Note 73 — Chapter V · Early History of the Locomotive—George Stephenson begins its Improvement.
Reading edition
Other machines, with legs, were patented in the following year by Lewis Gompertz and by Thomas Tindall. In Tindall’s specification it is provided that the power of the engine is to be assisted by a horizontal windmill; and the four pushers, or legs, are to be caused to come successively in contact with the ground, and impel the carriage!