Patent GB-191424434-A (GB)
Title: Improvements in or relating to Bicycles Pushers or Motor Attachments.
Inventor: DICKER STANLEY GORDON SINCLAIR
IPC: B62M7/14
Filed: 1914-12-21
Granted: 1915-12-21
Abstract: 24,434. Dicker, S. G. S., [Smith Co., A. O.]. Dec. 21. Cycle tractor attachments.-Motor attachments for bicycles consist of a stamped dished wheel having radial ribs, on the axle of which is mounted the motor, so arranged that it is directly above the tread of the tyre. The motor or pusher attachment is connected to the bicycle by means of a three-point connexion terminating in a double pivot, which permits the motor attachment to swing vertically and sideways, spring devices being provided to limit the latter movement. The motor frame is provided with extensions which carry a mud-guard, on which the fuel tank is mounted. The axle and crank shaft are provided with conical ends, which serve for connexion with the pusher wheel and fly-wheel, and form bearing-surfaces upon which the bearing-rollers ride. The pusher is attacherl to the bicycle by means of a bar 89, Fig. 1, connected to the rear axle and clamped at 88 to the frame. The bar 89 carries a bracket 90, through which passes a bar 91 having its upper end clamped to the frame at 92. The bar 91 is reduced at its lower end to receive a hollow vertical member 94 of a casting having an horizontal hollow member, to which the forward end of the arm 74 on the motor casing is connected by a bolt 98. By these means, the pusher is permitted to rock vertically and sideways. Springs 101 limit the latter movement. The crank-shaft 35, Fig. 5, and wheel axle 28, which is also the cam shaft, have coned ends and are mounted in roller bearings in cover-plates 30, 31, each shaft having an adjustable and fixed bearing. The bearings consist of rollers 33 mounted in cages 34 and bearing on the coned ends of the shafts, and coned rings 32; the adjustable coned rings are provided with lock-nuts 38 serving as housings for felt oil rings or washers 39. The crank-shaft and wheel axle are geared in the ratio 1:8, and are fixed to a fly-wheel 36 and the dished pusher wheel 20 respectively. The usual inlet and exhaust valves are fitted. The inlet valve is closed by a spring and is opened by the suction in the cylinder. The exhaust valve 47, Fig. 6, is closed by a spring 55 surrounding its stem 52, a stamped spacer 56 between the spring and the stem being provided to keep the spring cool. The lower end of the stem is actuated by a plunger 57 operated by a four-toothed cam on the shaft 28. The carburettor is bolted to the valve casing and is provided with a piston throttle valve 60, held open by a spring 61 and controlled from the handle-bar by a wire 62. The wire passes through the carburettor, and is provided with a collar 67 and passes through a lever 64, the end of which projects between the plunger 57 and valve-rod 52. These connexions facilitate start. ing by ensuring that, when the throttle valve is closed, the exhaust is open. The engine frame is provided with front and rear extensions. The front extension, forming an exhaust-silencer, is divided by a plate 72, Fig. 9. to form two chambers 70, 71, and a perforated plate 76 is secured by a dished plate 73. The exhaust passes in the direction of the arrows The rear projection 70', Fig. 7, forms an oil reservoir of the bird-fountain type, the oil run. ning through a channel 81 to the crank case.