The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . ar form of road motor is made by eouipping the axles ofa traction engine with the so-called Pedrail invented b^ B. J^.^Diplock. This is an arrangement whereby circular pads or feet,fastened around the periphery of a wheel, come successively incontact with the ground, the motion approximating to a smooth,even stepping or walking along. Fourteen of these feet are placed on the ground as the movement of the engine proceeds, and the engineitself roils along on the rail portion of the cam wliich rests
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . ar form of road motor is made by eouipping the axles ofa traction engine with the so-called Pedrail invented b^ B. J^.^Diplock. This is an arrangement whereby circular pads or feet,fastened around the periphery of a wheel, come successively incontact with the ground, the motion approximating to a smooth,even stepping or walking along. Fourteen of these feet are placed on the ground as the movement of the engine proceeds, and the engineitself roils along on the rail portion of the cam wliich rests on therollers beneath it. Ball and socket joints are used to connect thefeet to the spokes so that they may rest on any conformation theymay encounter. This machme has shown a remarkable abilityto pass over obstacles and rough roads, and even to climb roadlesshills. It gives a maximum of adhesion of the drivers, and it isclaimed that it will pass over rough roads with the expenditureof less energy than will an ordinary wheeled traction engine. Usspeed is necessarily low—about 4 m. per Fig. 2.—Chain Track Tractor. The Hornsby Chain Track Tractor (fig. 2), patented by Mr David Roberts, is provided with two endless chains, one on each side, which constitute the track on which the machine travels. Each chain is carried on two sprocket wheels, placed at the extreme
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
