Posts Tagged ‘Electric Dog’

1912 – Seleno, the Electric Dog – Hammond / Miessner -Addendum

In my earlier post on the "Electric Dog" by Miessner and Hammond (here), I commented on some uncertainty regarding Miessner's and Hammond's relationship together, and as to whether or not there may have been another dog built. This was as a result of how the newspaper and magazine articles were reporting on the "electric dog".

I finally got around to getting a copy of Miessner's book "On the Early History of Radio Guidance", published in 1964.

In 1957, in the proceedings for the Institute of Radio Engineers No45 pp1191-1208, there was an article written by John Hays Hammond Jr., together with E.S. Purlington titled "A History of Some Foundations of Modern Radio-Electronic Technology". The image below is from that article.

Electric dog Hammond Purlington 57 x640 1912   Seleno, the Electric Dog   Hammond / Miessner  Addendum

This article covers many aspects of Radio-Electronics, but for our purposes here we are only interested in Radio-Guidance and the "electric dog". In essesence, claims were made around secret work and Hammond's patents on radio-guidance, all without a single reference to Miessner himself. There was a bit of controversy at the time, but Miessner remained quiet, until 1964 by way of publishing his book.

Miessner 64 p37 x640 1912   Seleno, the Electric Dog   Hammond / Miessner  Addendum

In the book, he describes Hammond's sketch diagram of a phototropic vehicle. Hammond was influenced by Loeb's writings on "trophism".

Hammond goes abroard, and leaves Miessner and an assistant  mechanic, Joseph Broich, to build the machine. Miessner had already outlined a similar device, in tracking a searchlight for a torpedo. So with Hammond's  brief, Miessner and Broich designed and constructed what was later to be called the "electric dog".

Miessner 64 p39c x640 1912   Seleno, the Electric Dog   Hammond / Miessner  Addendum

Compare with Patent 1,387,850 by Hammond filed Apr 1912. see here.

Hammond's and Miessner's relationship deteriorated somewhat, and Miessner left Hammond's employ and went back to school. In wishing to demonstrate the model, Hammond allowed Miessner to borrow this obsolete piece of technology. Miessner describes the lecture series which so popularised the "electric dog".

So, there was only one dog, Hammond initiated and funded its development, Miessner refined the design and built it with Brioch in 1912, and Miessner later borrowed it.

[Note: also significant in the below is a transcript of a letter from Nikola Tesla to Miessner on Teleautomatons.]


Below are the relevant text extracts from Miessner's book.  

p12 BENJAMIN FRANKLIN MIESSNER
….. it would appear that Hammond's technical background was very limited indeed at the time. This view is reinforced by a plaintive query I received a few days later.
Hammond to Miessner, March 1, 1912:
As I understand, in the order of the General Electric Co. you intend to excite the fields of the low frequency, thousand spark frequency, generators with the high frequency alternators. This will give the effect of producing a 500 cycle note at the receiving station. Each of the 500 cycle circuits will in turn be composed of higher periodicities which are produced by the high frequency alternators. Explain the principle of this in your next letter a little more definitely.
A great many of Hammond's conceptions, given to me orally or by letter, were so crudely or wrongly put that they required invention on my own part to give them any meaning at all.
Hammond to Miessner, March 19,1912:
I have here enclosed a sketch of a proposed method of multiplex telephony, which if allright I wish you to submit to Mr Austin … Also include in my Orientation patent the idea of stopping the machine by the intensity of the light.
But more often the procedure was reversed and ideas went from me to Hammond and then to the patent attorneys.
Hammond to Miessner, March 23, 1912:
I would suggest your sending me your descriptions of the System of Selective Multiplex Wireless Telegraphy and Telephony and the description of the undamped waves of the periodically varying amplitude and the description of the Orientation System. I will go over these carefully and draw up claims for them and forward them to Austin.
I have said enough to show that during this entire period, far from actively undertaking laboratory work or even acting as my collaborator,
EARLY HISTORY OF RADIO GUIDANCE p13
Hammond was not even present in the laboratory except for brief visits; his relationship to the technical work being carried on was rather that of an absentee entrepreneur. In the spring of 1912, he actually left the country, having been appointed a member of the U.S. delegation to the International Radiotelegraphic Conference in London. I saw him off: there is a snapshot of the two of us on board his ship in New York harbor (Fig. 3). Besides going to London, Hammond managed to contact every important expert in Europe. From London he wrote me (on Conference Radiotélégraphique Internationale de Londres stationery, under the date le 4 Juillet) that he had already been in touch with "Count Arco, Majorana, Ferrie, Dr. Goldschmidt, Marconi, and Duddell, Erskine Murray, Prof
3.—Snapshot of author (right) and Hammond taken on day of Hammond's departure for England in June 1912.
p14 BENJAMIN FRANKLIN MIESSNER
Flemming and others. I have a stack of papers … that will fill a trunk … I am in touch with Zenneck … keep all of this to yourself."
It was during this period that I conceived, designed, and supervised the construction of an entirely new torpedo-control system and apparatus, utilizing known principles where possible and inventing new features as necessary. It was very fortuitious for me that the work was carried on in Lowenstein's laboratory, for I certainly learned a lot from him while spending nearly half of my time helping out on his own projects. On the other hand, Lowenstein participated relatively little in the work that was being done in his laboratory for Hammond, which was left almost entirely to me. In addition to the above-mentioned torpedo-control system, I also originated and designed many circuits related to the development of a jam-proof radio transmitter-receiver system.
First, I constructed four vacuum-tube assemblies (designated by Lowenstein as "ion controllers") for general experimental use. Their first application was in replacing the motor-driven, commutator-type dc current interrupters for tests on an of beat-type selective system that I had also designed. Tests with the audio-beat system proved to be very successful, albeit with a beat-tuned reed relay, but to some extent also with a beat-tuned LC circuit, followed by detector and a de relay. The main problem of close-range interference by enemy rf transmitters was not yet solved in practice; such interference could lock on the torpedo-control receiver and render the desired control ineffective.
Second, I increased the sensitivity and reliability under extreme vibration of the Weston microammeter relay by substituting a storage-battery-excited electromagnet for the permanent magnet (quadrupling sensitivity) and improving the contacts: a pointed platinum contact replaced the button contact on a moving arm, and a mercury globule covered by an oil film (to limit oxidation) replaced a fixed platinum contact element. The design was quickly carried out: my notebook shows that it was conceived and first tested in mid-February, with final tests taking place on March 1, 1912. (This instrument, which later accompanied me to Gloucester, attracted the attention of all who saw it; I well recall overhearing Dr. G. W. Pierce of Harvard University, when he first visited us at Gloucester, saying to Hammond that he would "take off his hat to the man who made that.")
Next, I designed and constructed a rotary stepping switch driven by an electromagnet, a crucial element in starting, stopping, or reversing the direction of rotation of the steering motor's armature-current control. A microammeter relay controlled a more powerful relay in the magnet circuit, which in turn controlled the pawl-and-ratchet device. The final design was carried out by Frederick Pierce Co. at 18 Rose Street in New York City.
EARLY HISTORY OF RADIO GUIDANCE p15
An even more important component that I designed and saw through construction was a motor-power relay with an adjustable time delay. This device involved a solenoid with a sliding core connected to a piston in a pneumatic dashpot fitted with an adjustable needle-valve air inlet and a spring-biased flapper-type valve for quick exhaust. An extension spring at one end served to return the core quickly to its normal position. A contact point on the opposite end of the core connected to a fixed contact; these contacts were in series with the armature circuit of the steering motor and the battery. After the stepping switch had selected the correct armature rotation direction, no current would flow until the time-delay switch finally closed the armature circuit ; but the field winding of the motor remained always energized.
This was a very necessary device, for the following reason. If the rudder was set, say, for a half-starboard position, and the steering motor was stopped because the stepping switch was in an "off" position, the stepping switch would have to go to a reverse (i.e., port) rudder position before it could go through the next "stop" and onto the following starboard rudder position. (The stepping switch ran in a continuous repetitive sequence, off—starboard—off—port—off—starboard, etc.) The time-delay relay simplified the operation, since short impulses did not switch on the current to the motor armature, so that any intermediate positions of the stopping switch could be, so to speak, skipped.
I also devised a mechanism driven by the steering motor via a flexible shaft; this device acted as a limiting switch for the steering motor, permitted setting of the rudder at the "dead center" position, and controlled flashing signal lights that indicated rudder position; and I designed such details as a worm drive and a clutch for the steering motor, so that it could be used in conjunction with a conventional steering wheel and be manually coupled to it or decoupled from it.
Finally, I designed and constructed an automatic photoelectric orientation mechanism for the purpose of demonstrating the "homing" type of guidance system. This apparatus, which became known as the "electric dog," attracted much attention; it is shown as Fig. 3 of the Hammond-Purington paper.'
It was during this period that I also conceived and designed, but did not carry through to construction, a stationary type of automatic orientation mechanism for mounting on a moving vehicle or boat. A rotating circular table of the "lazy Susan" type carried a motor with a pinion meshing with a stationary outer circular rack. The turntable also carried two condensing lenses separated by an opaque screen, and a selenium cell behind each lens. The entire apparatus was enclosed in a weatherproof housing through which the "eyes" looked outward. The device was intended for use with my fixed-frequency, amplitude-modulated, infrared
p16 BENJAMIN FRANKLIN MIESSNER
control system and would serve to keep the "eyes" always facing the control searchlight as a sunflower faces the sun, to avoid the possibility of enemy searchlight interference. Moreover, the control searchlight would be af-modulated mechanically to prevent stray interference by sunlight, or 120-cps-modulated electric light, and thus to permit daylight operation. In his letter to me of March 6, 1912, after acknowledging receipt of my progress report on this device, Hammond concluded by saying, "I also approve of your method of light orientation." (Previously, on Feb. 5, 1912, he had authorized purchase of the searchlight and other apparatus for this control.)
I even devised another method of modulating the electric-arc searchlight, using 500-cps ac instead of dc. Instead of using a large inductance to sustain the arc, I planned to use a small high-voltage step-up transformer to charge a high-voltage condenser that would periodically discharge across the arc carbons, as in a spark gap. (Choke coils were included to prevent the rf discharges from passing through the generator.) The primary current of the step-up transformer would be fed through a phase-advancing capacitor adjusted so as to cause the rf spark discharge across the arc carbons to occur when the primary current was passing through zero, so that the rf spark discharge would prevent extinguishing of the of arc current, which would ride across on the rf discharge. (I never did get around to testing this scheme during my work with Hammond, but I did test it a few years later at the Kearney power plant of the Public Service Co. of New Jersey, when I was employed by E. J. Simon, Inc. These tests were carried out with the help of William Siebenmorgan, a consultant to Simon who was very much interested in electric arc welding. The high currents and low power factors inherent in the use of arc welders, in which a large inductance is used to sustain the arc, were anathema to the power companies and we were encouraged to develop my alternate scheme; but although the tests were successful, we did not carry them very far. A similar scheme was later patented by others and I understand is in considerable use today.)
……
36 BENJAMIN FRANKLIN MIESSNER
But my misgivings regarding the motives that had inspired this offer were not dispelled; I wrote him refusing the offer and telling him that I intended to publish my own investigations and inventions. I concluded by saying, "I wish to assure you that my intentions in publishing the results of work which is original with me are not to injure you, but merely to get whatever credit may be due me for original work."
Hammond still endeavored to keep a door open: a letter he wrote me on April 12, 1913, closed with yet another offer: "If I am still in wireless work after you complete your studies at the University I will always be glad to offer you a good position."
During 1913-16, I attended Purdue University, a rather advanced student in some subjects, but quite unconcerned with others. On Oct. 15, 1913, soon after I started college, I gave a paper before the Purdue University branch of the AIEE, describing the radio-controlled torpedo work that, together with an account of all known prior art, had been also the subject of my article in the Scientific American of July 20, 1912. (A description of the lecture appears in Proc. AIEE 33: 21-22, 1914.) In a later lecture, a fascinated student body and faculty watched a demonstration of my light-control methods, including the aforementioned "electric dog," which Hammond had loaned me for the purpose. This device created a great deal of interest and I was asked to give three more lectures on the same subject. One was given in Indianapolis, before the Purdue-Indianapolis section of the AIEE. The second lecture was given at the Chicago Electric Club, where I made expanded demonstrations that included my "electric thief catcher." The third one was for charity: a brief demonstration of the electric dog, of remote firing of a pistol by a light beam, etc., made at the Auditorium Opera House; as part an Associated Charities minstrel show sponsored by the public utilities companies of Chicago. The electric dog caught the public fancy and newspapers throughout the country reported on it.
This device had been originally constructed on the basis of a two-page letter containing a rough sketch from Hammond, dated March 2, 1912. Hammond had been much taken with the writings of Jacques Loeb, the famed Rockefeller Institute biologist, who had proposed various theories explaining many kinds of trophism—for example, why moths fly into flames. Hammond thought that an analog device could be embodied in a photoelectrically activated mechanical contrivance on wheels containing its own motive power and a steering device (a turning rear wheel). It was my job to translate this sketchy concept into a workable, demonstrable device, and I did so, with the able assistance of Lowenstein master mechanic, Joseph Broich.
Hammond's original proposal (Fig. 9) was based on two selenium cells "eyes" separated by an opaque screen, each operating a relay. The two
p38 BENJAMIN FRANKLIN MIESSNER
relays controlled currents (from separate batteries) used to energize two solenoids, pulling oppositely on a centrally and vertically pivoted arm on which a tricycle-like steering wheel was mounted at the back end of the contraption. Hammond showed the two front wheels geared to a propelling motor for the machine.
Hammond seemed untroubled by the fact that sensitive relays would be necessary for use with selenium cells and could not be used to control the current in the steering solenoids directly. Nor did he worry over the fact that an automobile-like differential was required for the drive wheels and that the two solenoids were always pulling against one another for mastery of the position of the steering wheel. He did show adjustable series resistances in each of the solenoid circuits, perhaps in a vague hope that their pulls could be somehow balanced for the dead-center position, with the light shining into both "eyes." Once again, a considerable amount of inventing on my part and design work by Broich was necessary to construct a workable device, which turned out to be quite different.
As I mentioned previously (see p. 16), even before receiving Hammond's suggestion, I had already made selectivity tests on my modulated-light ideas, and on March 11, 1912, I sketched out my plans for the orientation mechanism that would keep a torpedo's "eyes" always facing the controling searchlight (Fig. 10). Since those days, the principles involved have been, of course, widely applied for missiles of the homing type, as well as for remotely guided missiles; for automatic guidance of celestial photographic telescopes; and for satellite tracking. The fixedfrequency-modulated infrared signaling system has also been applied to "invisible fences" for intruder alarms around factories, banks, etc.
….
p39
fig. 10.—Notebook entry dated Mar. 11, 1912, showing my plan of an "orientation mechanism" for torpedo control. Central table rotates to keep "eyes" facing controling searchlight.

42 BENJAMIN FRANKLIN MIESSNER


AN EARLY TEXT ON RADIO CONTROL
While still an undergraduate, I published a book (Radiodynamics, D. Van Nostrand Co., New York, 1916) of 200 pages and containing 112 illustrations, in which most of the "preliminary work" that the HammondPurington paper so blithely passes over is described in some detail, together with an account of all earlier known work on the same subject. The book is something of a rarity now outside of libraries: only 1100 copies were printed. Hammond tried desperately to stop its publication, by intimidating the publishers and myself, and by appealing to the War Department on grounds of security. The publishers questioned me about the propriety of disclosing Hammond's "secrets," and in a letter to Charles E. Speirs of Van Nostrand I sought to reassure them.
Miessner to Speirs, Aug. 14, 1915:
As to the laboratory secrets of my former employer, I would be foolish in hazarding my own reputation and future career by revealing anything which I was not entitled to speak, and have limited my manuscript accordingly. Moreover, M(r). Hammond not only knew that I was to lecture and write along this line, but approved of the same and supplied me with both material, experimental apparatus [the "electric dog"] and photographs for this purpose. On this point he wrote me on Oct. 11, 1913: "You may mention any of the points which you recorded while working here. These matters are now obsolete and I do not believe that their disclosure would have much bearing on my work."
With my letter, I enclosed blueprints of two letters from Hammond relating to my proposed publications and confirming that he was aware of my plans and eager for me to describe and picture the early work in his laboratory during my time there.
I also wrote to Gen. Weaver, chief of U.S. Coast Artillery, to whom we had made our control demonstrations in late 1912, and offered to submit my manuscript to him for editing. General Weaver begged off, saying that he did not feel equal to the task, but he suggested that we should submit the manuscript to Hammond for possible deletions. In the meantime, Hammond wrote to Van Nostrand asking for permission to look at my manuscript and threatening suit if any of "his" details were made public.
EARLY HISTORY OF RADIO GUIDANCE 43
Accordingly, Hammond was invited to see the manuscript at the Van Nostrand offices in New York, an invitation that he accepted with alacrity. Speirs wrote me afterwards that Hammond had exhibited an "attitude which was rather imperative." Speirs himself felt that "whatever we do is more as a. matter of courtesy than right, and it is quite apparent to me from his letters to you that you have his permission to do precisely what you have done." Hammond wrote out a page of criticisms, which Speirs sent on to me, and which ended with another threat of legal action.
Hammond to Speirs, Feb. 26, 1916:
… I wish to state that my letter to Mr. Miessner authorized him to describe the work up to the time that his services ended with me at my laboratory. This he seems to have done fairly exhaustively. Any information which he may have been able to obtain later than that time concerning my work which he attempts to publish will be taken by me as grounds for legal suit, and I am confident that I shall have the backing of the government in the institution of such a suit.
I have shown this book to present-day experts and have been told that the only reason why it did not go beyond a single printing was that the material was far ahead of its day. It is interesting to note that the publishers' reader thought that my manuscript was well done, but felt that some of my statements might sound "over sanguine" to some readers. In the light of later developments in radio control and guidance, he need not have been so diffident.
I am almost certain that the reader who reviewed the book for Van Nostrand was none other than Nikola Tesla. Since I was planning to include descriptions and drawings of his pioneering efforts in the field of automatic control, I had written to him, only to find that he was already well acquainted with my project. We exchanged three letters in all, the first in September 1915. (The originals of his letters are in the Manuscript Division of the New York Public Library.)
Tesla to Miessner, Sept. 29, 1915:
Your favor of September 24th has been received in due course and has interested me in view of your forthcoming book on "Radio Dynamics". Some time ago my friend, Charles E. Speirs of the D. Van Nostrand Company, told me that you were engaged in its preparation and I commended it for publication as very little has been written on the subject …
I am naturally greatly absorbed in this field of invention which has been barely touched and which I look upon as extremely promising. In an article in the Century Magazine, copy of which I am forwarding to you, I have related the circumstances which led me to develop the idea of a self-propelled automaton. My experiments were begun sometime in '92 and from that period, on, until '95, in my Laboratory at 35 South Fifth Avenue, I exhibited a number of contrivances and perfected plans for several complete telautomata. After the destruction of. my Laboratory by fire in '95, there was an interruption in these labors which, however, were resumed in '96 in my new Laboratory at 46 East Houston Street where I made more striking demonstrations,
44 BENJAMIN FRANKLIN MIESSNER
in many instances actually transmitting the whole motive energy to the devices instead of simply controlling the same from distance. In '97 I began the construction of a complete automaton in the form of a boat, which is described in my original patent specification 013,809. A copy of this, also, is being forwarded under separate cover. This application was written during that year but the filing was delayed until July of the following year, long before which date the machine had been often exhibited to visitors who never ceased to wonder at the performances. The drawings of this specification were made from this machine to scale. In that year I also constructed a larger boat which I exhibited, among other things, in Chicago during a lecture before the Commercial Club. In this lecture I treated the whole field broadly, not limiting myself to mechanisms controlled from distance but to machines possessed of their own intelligence. Since that time I have advanced greatly in the evolution of the invention and think that the time is not distant when I shall show an automaton which, left to itself, will act as though possessed of reason and without any wilful control from the outside. Whatever be the practical possibilities of such an achievement, it will mark the beginning of a new epoch in mechanics.
I would call your attention to the fact that while my specification, above mentioned, shows the automatic mechanism as controlled through a simple tuned circuit, I have used individualized control; that is, one based on the co-operation of several circuits of different periods of vibration, a principle which I had already developed at that time and which was subsequently described in my patents #723,188 and 723,189 of March, 1903. The machine was in this form when I made demonstrations with it in 1898 before the Chief Examiner, Seeley, prior to the grant of my basic patent on Method of and Apparatus for Controlling Mechanisms at a Distance. [My italics.]
In my experiments and investigations in Colorado from 1899 to 1900, I developed, among other things, two important discoveries which will be essential in the future development of telautomatics. They are described in my patents #685,953 and 119,732 which were taken out at a later date. These two advances make it possible to supply to an automaton great amounts of energy and also to control it with the utmost accuracy when it is entirely out of sight and at any distance.
My book summarized the radio-control work done at the Hammond laboratory (mostly by myself) during the period preceding that covered by the Hammond-Purington paper.1 It is curious that neither the book nor any of my subsequent publications are referenced in that paper. ….
p58 BENJAMIN FRANKLIN MIESSNER
….
(2) The target-seeking feature for homing on enemy searchlights and the operative mechanism of the "electric dog" ( p. 1193) were devised and constructed under my direction while Hammond was attending the International Radiotelegraphic Conference in London in 1912.
…..

1928 – Phil the Radio Dog a.k.a. “Philidog” – Henri Piraux (French)

 1928   Phil the Radio Dog a.k.a. Philidog   Henri Piraux (French)

This is what everyone’s been waiting for – new and more detailed information on “Philidog” by Henri Piraux (sometimes Henry Piraux, of Philips France).

One of the articles to be presented tells us that the dog has gone through a bit of an evolution. Unfortunately I’ve been unable to get a date of the original incarnation.  Here’s the list of versions created:

1st was not mobile,
2nd was mobile and batteries,
3rd was mains powered,
4th mod included touch sensitive whiskers.

138587658 philidog gettyima  1928   Phil the Radio Dog a.k.a. Philidog   Henri Piraux (French)

Image source: Getty images


I was fortunate enough to locate an article that gives a description of operation, as well as a circuit diagram!!

The Anatomy of PHIL the Radio Dog

An ingenious device has been produced by Philips Radio for demonstrating the working of their new photo-electric cells. This is “Phil,” the “Radio Dog.” Wherever he has been exhibited, his ability to bark and to move forward or in circles at the command of his owner, has caused much speculation, Below we unveil the mystery of his anatomy.

Fig. 1 shows the radio dog deprived of his external covering [not the above pic]. The “eyes,” formed by two photo-electric cells stand out clearly, Furthermore, there are the amplifying valve’s and several relays, an accumulator, batteries, and several other electrical accessories the operation of which will be explained in the continuation of this article.
A photo-cell consists at an exhausted glass bulb containing two electrodes. One electrode consists of a metallic mirror deposited  on the inner side of the bulb, while the other electrode is a spiralised filament. The metallic mirror will emit electrons when light falls upon it, just, as in the case of the filament of a radio-valve. If the metallic mirror is connected to the negative pole, and the spiralised filament to the positive pole of a source of voltage, these electrons will be attracted by the anode so that by exposing the photo-cell a current is generated.
If a resistance is placed in the circuit, there will be a drop in potential dependent on the strength of the photo-electric current passing through it.
As the resistance is also included in the grid circuit of the amplifying valve, this drop in potential at the same time controls the amplifying valve, so that the anode current of the valve is altered in the same ratio as the current passing through the photo-cell.

Fig. 2 shows the next stage [not shown but included in Fig 4.]. For the sake of simplicity we assume that relay 1 is in direct. connection with the positive pole of the anode tension supply. A relay is an apparatus which makes it possible to close with low power a second circuit for higher power. It consists of an electro-magnet and a movable armature which, being attracted, makes and breaks contact when the magnet is excited by an electric current.

With the Radio-Dog, when the photo-cell is exposed to light, the anode current of the amplifying valve passes through Relay 1 (Fig 2), so that the armature is attracted and closes contact C. This excites Relay VII., the result being that armature AIV is changed over and motor MI switched on via contact D.
As the other “eye” can start the second motor in  an entirely similar manner, both motors will turn when both “eyes” are exposed, thus causing the dog to move forward The two motors are entirely independent of each other, so that by exposing only one of the photo-cells, one of the motors is made to turn, thus causing the Radio-Dog to revolve on its axis.
“Phil” can also bark like a real dog. Fig. 3 shows [not shown but included in Fig 4.] the circuit by which this effect was obtained. The anode current of both amplifying valves passes through relay III., which is connected in series with the anode supply of both amplifying valves. The adjustable resistance, R4, is shunted on its winding in order to regulate sensitivity. This resistance has been adjusted in such a manner that relay III. does not operate until the two valves supply their saturation current. This is the case when the photo-cell is strongly illuminated. Then armature AIII. is attracted, thus exciting relay VI.
As armature AV. is changed over, the supply of the two motors via contact F is interrupted, so that the dog stops, and as armature AVI. touches contact G, the horn is operated. Moreover, an interrupter is incorporated in the horn circuit, so that the dog does not keep on howling, but barks only at intervals.
If the above description is read attentively, will be easy to follow the complete circuit diagram of the Philips Radio-Dog, as shown  in Fig. 4. The greater part of the electric currents supplied are obtained from the lighting mains by rectifiers.


From San Antonio Light newspaper 08 June 1930 p59  -text below

Le chien de garde electrique (electric watchdog) was the hit of the recent radio show in Paris, where its “kennel” drew greater crowds than did the blue-ribbon winner at the Winter’s dog show.
Mr. Piraux’s first canine robot merely barked and worked its jaws whenever light fell on its glassy eyes. The power for this was supplied from a storage battery, inside the wooden hound. Then the inventor put wheels on the legs and supplied them with motors to pursue anyone who turned a light on the automatic animal.
These, however, with the storage battery, made too much weight for the power and resulted in such a slow-footed “dog” as to be unimpressive.
To pep him up, the inventor removed the battery and connected his pet with a long wire to the electric light socket. This had the effect of making the “chien electrique” as quick and vicious as if he had been fed all Winter on raw meat. Being a patriotic Frenchman, M. Piraux, of course did not build his chien on the lines of the German police dog nor the English bull either, but chose the French poodle which, to his mind, is the noblest form of canine life.
In the head of the 1930-model mechanical poodle are eyes, containing lenses behind which lie photoelectric cells. As long as no light falls on these nothing happens. But, if someone lights a match or turns the rays of a flashlamp in their direction, the light passing through the lenses causes the photo-electric cells behind them to allow a current to pass through. This current is amplified by two radio tubes and several relays before reaching the motor.
One of these motors works the lower jaw and its teeth up and down and with the same action draws a phonograph needle over a steel record, producing a series of growls and barks, calculated to alarm the invader and rouse the household.
This much happens whether the light falls on either eye or both. The mechanism that sends the mechanical Towser in pursuit of the person carrying the light is more complicated.
If the light falls on the left eye, the photo-electric cell beneath sends current only to the wheel on the right side. When the light falls only on the right eye, the opposite happens.
In either case the result is to turn the “animal” around until it is headed for the light, which then falls on both eyes alike and then both wheels revolve at the same speed, causing the robot poodle to charge at the source of the illumination, barking and snapping as he goes.
Provided the sudden, noisy interruption does not scare the wits out of the burglar, he probably could avoid the jaws easily enough, because they only work vertically, but the inventor has added another feature more suggestive of the cat family. This consists of a set of long feelers, or whiskers, made of pointed steel and electrically charged.
It would be harder to avoid these, and if one touches him the intruder will find the dog’s sting worse than his bite. A bullet shot into the mechanical mutt would probably cause it to die of short circuit, but after the barking and the firing no burglar would hesitate about getting out of the neighborhood as fast as he could.
The synthetic dog cannot be chloroformed, poisoned or beguiled by meat and candy but he has other faults. He is too incorruptible. The average family dog, left to sleep downstairs by the door, uses some discretion, like a policeman. He recognizes the belated steps of the head of the house, even if they are a trifle unsteady, and known it is not necessary to betray the fact that he ia coming home at an unseemly hour.
But how is the mechanical Fido to know who is who? It might not be so hard to sell these dogs if only the man of the house would be exposed, but nowadays, everybody, including the flapper daughter, has a latch key and sometimes “checks in” a little later than she wants to advertise.
M. Piraux is ready to adapt his idea to all sorts of other forms besides the dog. In a museum, where it would not be desirable to have the electric animal charging around among glass specimen cases, he suggests on the wall a bison’s head that will bellow and keep it up till the watchman comes and opens a switch, or a suit of armor that can be made to swing a sword or battle axe.


From the French magazine Atomes Oct 1957

“Il fut présenté en 1929 au Salon International de la T.S.F. de Paris et à l’Exposition Internationale de Magic-City. Il était l’oeuvre d’Henry Piraux, aujourd’hui chef de la propagande technique à la Société Française Philips, qui doit donc être considéré comme un pionnier de la cybernétique. Sensible à la lumière, ce chien suivait une torche électrique, tournait, virevoltait autant de fois qu’on le lui commandait. Mais, quand on lui présentait la lumière de trop près, just sous le nez, il se mettait à aboyer, pas content du tout.”

translation:
“It was presented in 1929 at the International Salon of the TSF in Paris and at the International Exhibition of Magic-City. It was the work of Henry Piraux, now head of technical propaganda at the Philips company in France, who should hence be considered as one of the pioneers of Cybernetics. Sensitive to light, this dog followed an electric torch; turned and twirled around as often as it was told to do. But when the light was presented too closely, just under its nose, it started to bark, not happy at all.”

Translation borrowed from here.


Philidog andre breton 1928   Phil the Radio Dog a.k.a. Philidog   Henri Piraux (French)

Collage by the French Surrealist artist, Andre Breton (from here).


See other early Electronic and Cybernetic Animals here.


1915 – Electric Dog – Christian Berger – (Hungarian / American)

I found a single reference to a French Electric Dog that "will jump out of its kennel when a whistle sounds". The rest of the brief article talks about Miessner's "Electric Dog".

Ingenious Mechanism – Le Grand Reporter, 30 Dec 1921 p2 

The electric dog which will follow a lantern in the dark—a mechanical curio constructed by John Hays Hammond, Jr.— has a rival in a French electric dog that will jump out of its kennel when a whistle sounds. The Hammond dog is controlled by selenium cells. The amount of electricity that will pass through selenium varies with the amount of light shining on the metal. With a selenium cell for each eye of the dog, and a small electric current operating a steering gear inside the toy. the dog will steer its course so as to have an equal amount of light on each eye, which means that it will keep its head toward any light. Storage batteries, and a motor, or clockwork, may be used for moving the dog.—Christian Science Monitor.

 

My next post in this category will be Piraux's 1928 Radio Dog "Philidog". This dog went through a few modifications before the one listed.

However, article suggests the 1921 dog is activated by a whistle, not a light, so it probably is different to Piraux's.

There is a patent that describes a similar contrivance, and may be the same item, so I will present that here.

Christian Berger's patent 1,405,708
Patent number: 1405708
Filing date: Nov 14, 1918
Issue date: Feb 7, 1922

Berger was originally from Budapest, Austria-Hungary. In 1909 he applied for a patent for "CONTROLLING FROM A DISTANT POINT THE OPERATION OF A MECHANISM OR INSTRUMENT. Patented in the US in Mar 11, 1913 Ser # 1,055,985.

Having an affiliation with Europe, it is quite possible that the "electric dog" mentioned is actually Berger's invention.

Pat US1279831. See here.

berger dog eejun1917 x640 1915   Electric Dog   Christian Berger    (Hungarian / American)

Berger's toy as described in The Electrical Experimenter, June 1917.


 

1912 – Seleno, the Electric Dog – Hammond / Miessner

A lot has already been published already about Seleno, try these links: 

http://www.davidbuckley.net/DB/HistoryMakers/HM-ElectricDog1912.htm
http://www.beam-wiki.org/wiki/Seleno,_The_Electric_Dog
and my Addendum.

Here are some pics and excerpts showing different aspects of the "Electric Dog".

Technical articles on the Electric Dog appeared in Scientific American Supplement No. 2267 p376-7 June 14, 1919 written by Benjamin Franklin Miessner, in the Electrical Experimenter, 1915, p. 202. , and Popular Science Monthly.

Miessner described in some detail the behavior of the electric dog in Radiodynamics: The Wireless Control of Torpedoes and Other Mechanisms [Miessner, 1916].

Whilst the Electric Dog itself was not patented, certainly the technology was in terms of light guided missiles/torpedoes. Look up these in Google patents

SYSTEM OF RADIODIRECTIVE CONTROL – Patent #1467154
Filing date: Jun 7, 1912
Issue date: Sep 4, 1923
 
SYSTEM OF RADIODIRECTIVE CONTROL – Patent #1387850
Filing date: Jun 7, 1912
Issue date: Aug 16, 1921
See Fig 1. in this patent diagram. It is essentially the patented circuit of the "electric dog".
us001387850 001 x640 1912   Seleno, the Electric Dog   Hammond / Miessner

us001387850 002 x640 1912   Seleno, the Electric Dog   Hammond / Miessner

As mentioned in another post on Enabling Technologies, one of the best references is: 
Radiodynamics, By Benjamin Franklin Miessner (PDF file) – Chapter XXIV {24} (which begins on page 189 and continues through page 199) contains a description of the "orientation mechanism" that is the heart of Seleno, the Electric Dog. The entire book can be downloaded as a PDF file.

The earliest date I can find for Seleno is 1913, although Hammond was certainly exploring Selenium control since 1912 when he was looking at torpedo remote control. I tend to date on the creation of the model itself, rather than the underlying technology.

[Note: RH -  Jan 2010 - see new addendum here that actually dates "electric dog" in 1912.]


Miessner vs Hammond : It appears the the Electric Dog was developed when Miessner worked for/with Hammond. Most of the articles the include the "Electric Dog" either have Hammond or Miessner, never both.  It is unclear if they 'shared' the same dog, or the Hammond photographs are earlier than published, whilst Miessner seems to have the dog in latter years.

I have since seen a reference in a book by Miessner (1964) on "The Early History of Radio Guidance" where Miessner talks about Hammond loaning him the "Electric Dog" to demonstrate at a few lectures he was giving. At this time Miessner had already parted to work with the Navy and for further education.

[Note: RH -  Jan 2010 - see new addendum here that actually dates "electric dog" in 1912 and gives the story on Miessner vs Hammond.]

FortWayneSentinel27021915p14ElectricDog

Selenium is Magic Eye Which Sees Hundreds of Miles; Controls Torpedoes and Crewless Airships
Young Scientist Predicts Marvelous Results from Experiments With Selenium—
Points to "Electric Dog" as Example of Its Possibilities.

(By Kenneth W. Payne.)
Lafayette, Ind., Feb. 27.—After seein young Benjamin Franklin Miessner's "electric dog"—a small glass-eyed box on three wheels—actually pursue his
master about the room; after hearing Miessner predict that in time men in San Francisco will be able to witness a prize fight in Australia; after seeing a flattened bullet with which Miessner nearly killed himself while perfecting a magic "thief catcher;" after hearing him say that right now he could guide an absolutely unmanned Zeppelin from a boat in the English channel on a raid over coast towns; and after—
Well, naturally, after all this voyage into the land of miracles, one is too thrilled and dazed to know how to begin writing a story in a conservative, unenthusiastic way.
Yet this story must be told, for it concerns some extraordinary experiments with the element, selenium, which are taking place right under our noses in America today, and about which, in spite of their vast significance, only a few scientists know anything at all as yet.
Let's begin at the beginning, with Selenium.
"It's one of the elements,'' Miessner explained. "It comes in bluish-gray slicks which look like sealing wax; and it costs about $3 an ounce.
"Selenium has the peculiar property of changing its electrical resistance when influenced by light. That's the simple secret of all the weird things that scientists are doing with it."
Miessner is only twenty-five year's old now, a graduate of the Huntingburg (Ind.) high school, and of Uncle Sam's navy. After serving three years in the radio-telegraphic department of the navy, he worked for two years with John Hays Hammond, Jr., at the interesting job of steering deserted ships all over Gloucester harbor from a wireless station on shore.
Now Miessner is studying for a degree at Purdue university—and incidentally telling his learned professors a few things about radio-telegraphy and electrical engineering which they never heard before.
To illustrate his experiments, Miessner called his electric dog. From an electric flash he threw a bright light in the dog's goggly eyes, and the strange object at once ambled obediently out toward his master. Wherever Miessner went, about the room with that light, he dog patiently followed, as inexoribly compelled as the moth by the flame.
"The electric dog has two cells of selenium, one behind each of those glass
eyes," explained Miessner. "When I throw the light upon him, if it falls upon either eye it reduces the electrical resistance of the selenium, as I explained before and and an electrical current is allowed to pass through, starting the motor which turns the dog's wheels. He heging to advance. But if the light comes from the right, say, it hits only the right eye, because of the projecting screen between the eyes, then the current passes through that, eye, only and not through the other. An arrangement of batteries and electro-magnets then pulls the little rear wheel to the right and that turns the dog straight towards light, whereupon it shines in the other eye also, and the current passing through this eye charges an electro-magnet which pulls the little wheel, or rudder straight again. So you understand whenever the dog sees a light, he simply has to go.
"Now, we can make our electric dog over into a 'dog of war.' By simply readjusting the mechanism, the two selenium, eyes can be made to pursue a dark object amid light surroundings.
Supposing a torpedo fitted with such apparatus were launched from shore on a bright day toward an attacking fleet.
The battleships would stand up as the only dark objects against the bright sky and the torpedo would head straight for them with infallible and inescapable precision.
"A change in the mechanism makes it possible to drive your electric dog, or torpedo, or Zeppelin, away from "you by prodding it behind with a search–light, instead of pulling it toward you."
Miessner threw over a switch on his electric dog, and then when he flashed the light on the bulging eyes, the dog promptly, almost fearfully, backed away.
The marvelous see-at-a-distance projects of which Miessner talks, are based also on the ligut sensitivity of selenium, the "magic eye." The apparatus consists roughly of a great "compound eye," composed of some ten thousand selenium cells, each cell connected with a similarly situated glowlamp on the receiving apparatus. The selenium cells are unequally illuminated "by the light which falls on them from the objects within their range of vision, thus allowing currents of varying strength to pass through, they will light their respective glow-lamps in exact reproduction of the light and shadow of the objects before them.
"By a somewhat similar apparatus photographs have actually been transmitted by wire from Monti-Carlo to Paris, and published in the papers." Miessner commented.

The selenium thief-catcher invented by Miessner consists of a selenium cell with guns, bells, a camera and flash light. As soon as the light of the burgIar's dark lantern hits the selenium eye the whole array of noise makers goes off in one grand hubub. The thing's practical, because Miessner tried it out before a meeting of the Electric club in Chicago, recently, and nearly frightened the club out of its wits, besides taking a very good photograph of himself.

(Picture caption)
This extraordinary photograph—the first selenium-snapped picture ever published in Fort Wayne— shows Benjamin F. Miessner, surprised by his own burglar-catcher. Miessner was on the darkened stage before a meeting of the Chicago Electric club. When the flashlight in his hand hit the selenium cell—the small white object on the standard at 10ft—a gun was fired, a flash of powder went off, bells rang, and the camera took this picture. Below, Miessner drawing his electric dog toward him with a pocket electric lamp.
The canine's selenium eyes arc located behind the two glass lenses, in vacuum tubes whose tops form the dog's "ears" in this picture. His nose is the screen projecting between the eyes, which prevents light falling on both unless it is situated directly in front.

 

An interesting article describing the possible futures of the "Electric Dog".

Washington Post 02 May 1915 p55

Dog That Does The  Housework

A SURPRISE FOR THE BURGLAR—THE ELECTRIC DOG IS AS GOOD A
WATCHER AS HIS FLESH-AND;BLOOD COUNTERPART.
MECHANICAL CREATURE THAT WILL FIGHT BURGLARS, SWEEP
AND DUST AND BE GENERALLY USEFUL.
[Technical World Magazine ]

He is a queer-looking dog. He has only three legs. He doesn't bark, bite, nor chase the neighbore' chickens. He is even at peace with the family cat, which purrs contentedly as it ;vetches with speculative mien the peculiar antics of this unknown thing which seems to be at the beck and call of his master. Of course her feline, majesty doesn't know he isn't a reel dog. She judges so only from hearsay—that is, she heard some one say, "Oh, isn't he a wonderful dog!" – So she trusts her ears and doubts her eyes. This dog possesses none of the malicious characteristics of "Snarleyow, the Dog Fiend." Rather, he could be likened to faithful "Old Dog Tray." His cost—that bugbear word in these days of high prices and low wages—is merely nominee. As to food, that is nil. Regarding repose, like the famous detective, he never sleep's. In fact, his every action is guided by the rays that penetrate his material being.
The eyes of this melancholy-looking creature are of bulging glass, each one as large as a saucer. Hie body is an oblong mahogany box, which contains an electric motor, a storage battery, two selenium cam, two relays, and two solenoid magnets. He has no tail to speak of, but in its place is an electric switch. He is controlled by three brass wheels, two in front and one in the rear.
When the motor inside the dog is started he will do some extraordinary things. If you walk before him carrying a lighted lantern, he will follow you, turning to the right or left as you turn, although you neither touch nor control him in any way that is visible to the spectator. He steers himself briskly after his leader in a way that is positively uncanny.
The mystery is solved, however, when it is explained that what guides him is the light from the lantern, which operates upon the strangely sensitive element called 'selenium. If this light is moved to the left, the left selenium cell receives more of it and thus more stimulation than the right veil, and so allows more current to flow from the storage battery into the left-hand magnet, which then deflects the hind wheel to the left and the dog turns in that direction. For the same reason. when one turns to the right, the dog follows. If one wants the dog to go backward, all that is necessary is to reverse the tail switch. Then. when his master advances on him with the light. he will seemingly become timid and back away in a most surprising manner. But how can this annual be made use-ful? Welt, so far, of course, the Held has not been thoroughly explored; but there are certain household utilitarian purposes to which we might imagine he may be adapted.
Sweeping rugs and carpets constitutes one of the numerous duties of the housewife. The form of drudgery may be done away with by utilizing the electric dog. While vacuum cleaners and patent carpet sweepers have to a certain extent supplanted the old-fashioned but still efficient broom there, is yet a necessary amount of manual labor required to operate either of them_ By a very simple arrangement a rotary brush, similar to that used by street railways to sweep the tracks, could be attached to the rear of the dog. together with a pan to catch the refuse from the floor. – Then, with a pocket electric light or a small dark lan tern in her hand, used as a guiding star. the lady could take her ease in a chef: and direct across the carpet the course of this faithful and tireless servant.
In flats or houses not Wired for electric lights the dog may be used to help out the housewife with her sewing. in Order to attain this result it would be necessary to have a grooved wheel. a simple accessory that could easily be attached to the mechanism of the apparatus. The latter could then be clamped to a box of convenient height, the sewing machine strap removed from the large wheel and adjusted to the grooved wheel of the dog. A pocket flashlight is installed where the operator could reach it with her foot. By pressing a buttonthe light could be turned on or off at will, thus starting or stopping the machine as desired.
One of the tables on wheels used for carrying kitchen dishes from the dining table into the kitchen might easily be mounted on the back of the dog. He could be made to follow the maid or mistress about as she piled the plates, cups, saucers, &c, on the top, and then follower her into  the kitchen.

Also, there could be arranged on the top of this table a receptacle for the aby, in which it could be placed for its afternoon nap. Directed by the rays, the whole apparatus; would traverse the room and a mechanism could automatically reverse an electric switch after the vehicle lad gone a certain distance, and compel t to retrace its path. In the course of erne, and with proper development, this selenium dog, with his accessories, might 3e utilized in the moving of heavy furniture, such as pianos, tables, refrigerators and trunks, and thus assist materially luring the trying days of Baring cleaning. There are various other devices in which this peculiar animal, with his sensitive attributes, could be utilized. He could. be used for a burglar alarm, in connection with an electric battery and relay. This may be wired to the alarm bell proper. connected with dry batteries, wherever it may be deemed advisable place the alarm bell—if in the home, in the bedroom of the head of the house; if in the office, the wire may lead to the nearest police station. When the gentlemanly burglar enters the room and flashes his electric pocket light, its rays will strike the selenium cell and the gong will ring. But this is not &1 that may be accomplished. If a little mechanical ingenuity is brought into play. A. revolver and a camera might be added to the equipment to complete the discomfiture of the burglar The revolver. aimed in his direction, would either cripple him or give him a good fright, while at the same time a flashlight would enable the camera, to take a photograph of him.
By mounting a revolver drum or capstan on the dog, and equipping the head of each flight of stairs with a hook, the dog could be made to pull himself from floor to floor, in order to fulfill his household duties anywhere in the structure Inasmuch as .-he would be a heavy dog, this !might be necessary. but of course, he could be made to carry loads on his back while climbing. For instance, he could take the family washing from the laundry, carry it to the stairs, and. when planks are laid, and his rope connected to the hook, he would carry it up to the floor where a was wanted.
By mounting a row of three auxiliary eyes, each with a different-colored glees in front of it, even greater results would be secured. Turning on a red light would actuate only the red cell, Inasmuch as the light would not pierce the blue and yellow filters. f some place In expected to burst forth into flame—as. for instance. a rubbish heap—the doe might be. put on watch. ready to Send an alarm if red and yellow light from an incipient fire fan upon his eyes. For ordinary household use, a lantern equipped with white, red. yellow and blue eyes could give a. variety of signals that would cause the,dog to perform a multitude of tasks.
A refinement that would immensely increase his usefulness would result if his eyes could be kept turned toward the light, no matter where he should be in the room. With such a device, and mirror opposite the doer, the dog could even be sent out of the room on errands. Truly, the possibilities for the electric dog ere endless

The following 2 images located on David Szondy's site here.

electric dog PracElecp2 1912   Seleno, the Electric Dog   Hammond / Miessner

electric dog 001 x640 1912   Seleno, the Electric Dog   Hammond / Miessner

Popular Science Monthly March 1916.

It didn't take long for other students at the time to be inspired…

Moberly Daily Monitor 14th May 1915 p3ElectricDog
(no pic)

Electric Dog Is Faithful
That engineers do not lose interest in animal life by dealing with machines is proved by the fact that the electrical engineering students of Highland Park college, Des Moines, Iowa, are making a dog which will follow his master all over the place.

This dog consists of a small box shaped like the animal with two rather prominant eyes in its head.

The eyes are made of metal Selenium . Thin mechanical dog moves his head around until he sees a light; when he at once fixes his eyes intently upon the light toward which be moves rapidly.
It in only necessary for the dog's master to carry around an electric light, a pocket search light, or something of the kind to cause the, dog to follow him. The inside of the dog, made entirely by students of Highland Park college, consists off wires, Motors,  and other electrical elemients. If this mechanical dog loses his master, he stands still and moves his head around until he discovers the light again.