1907 – Walking Wheel Carriage – Henry S. Hele-Shaw (British)

  Patent number: 880526 – see full patent details here. Filing date: Jun 27, 1907 Issue date: Mar 3, 1908 A very ingenious walking wheel mechanism was invented by the British inventor H. S. Hele-Shaw.  He was inspired by another British invention, Diplock's Pedrail and heavily promoted the Pedrail before inventing his own variation. The carriage …

1900 – Pedrail Walking Wheel – Bramah J. Diplock (British)

See full patent details here. Patent number: 658004 Filing date: Feb 7, 1900 Issue date: Sep 18, 1900 Further patent improvements include US747387, US787500, and US979447. Source: Popular Science September 1933 Some images located here. The Pedrail wheel Text from Wikipedia.   A pedrail wheel climbing stairs, February 7, 1904 The New York Times. The pedrail wheel is …