GB400160A - Change speed gears for motor cars and the like - Google Patents

Abstract

400,160. Controlling variable speed gearing. CHRISTENSEN, H. T., 33, Refnaesgade, Copenhagen. Jan. 12, 1932, No. 937. Void [Abridged as open to inspection under Sect. 91 of the Acts, Jan. 14, 1932]. [Class 80 (ii).] Change-speed gearing upon a vehicle is controlled by connecting a number of cylinders 11 selectively to engine suction. In a form shown in Fig. 1, the cylinders 11 are arranged around a ball change-speed control lever 10 and the piston 12 of each cylinder 11 is connected to the lever 10 by a chain 14, a return chain 16 passing over a guide pulley 15. Each cylinder 11 has a cock 19 with a control lever 20 making connection to a common suction pipe 18. Gear changes are effected by operating these levers 20 selectively. As shown in Fig. 1, the levers 20 are connected by chains 26 to push-buttons 21 upon a keyboard. In an arrangement shown in Fig. 6, the levers 20 are operated automatically by tappets upon a rail 36 slid longitudinally by a governor 38 driven from the vehicle road wheels. Cylinders I, II, III and N are for first, second, and third, forward speeds and neutral respectively. Cylinder C is for the engine clutch. There are four tappets for operating cylinder C each corresponding to one of the single tappets for operating the other cylinders. An additional tappet may be provided for restricting the fuel supply during speed changing. Two of these tappets 42 and 43 are shown as pivoted bellcrank levers so as to be operative in one direction only. To effect reversed driving, the rail 36 is locked in neutral by thrusting a pin, not shown, down through the rail and through an aperture in a fixed plate so as to engage a chain connected to the lever 20 of a reverse cylinder R so as to connect that cylinder to suction. A construction of one of the cocks 19 is described.