Engineers and Mechanics Encyclopedia 1839: Railways: John and Samuel Seaward

In November 1825, Messrs. John Seaward and Samuel Seaward, of the City Canal, London, obtained a patent under which their claim was for "the propelling locomotive engines, vehicles, and other carriages, by means of a wheel or wheels connected either by a swinging frame or frames to the crank shaft of a steam-engine, or other moving power, or working in circular grooves, so that it, or they, may rise or fall, to connect themselves to the roughness or unevenness of the ground, but supporting no part of the weight of the said engine, such weight being entirely supported upon separate wheels."

A locomotive engine at a was placed on two pair of wheels b; c is the crank shaft of a steam-engine within the body of the machine; to the shaft c is attached the swinging frame d, with a propeller e turning on its axis g, at the vibrating end of the swinging frame. The steam-engine was upon the springs f, so that the machine might travel upon rough roads.

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