Patent GB-497321-A (GB)
Title: Improvements in control means for motor vehicles
Filed: 1937-05-11
Abstract: 497,321. Controlling motor vehicles. DAUSMANN, C. F. May 11, 1937, No. 13401. [Class 79 (v)] Combined throttle and brake operating means comprises a brake lever 7, Figs. 1 and 2, having one end projecting upwardly through the vehicle floorboard 5 and a throttle-actuating member 27 mounted on the brake lever so as to have limited rectilinear and pivotal movement relatively thereto, the first part of the rectilinear movement of the member 27 in the brake lever causing the throttle tc open, but further movement causing the member 27 to disengage from the throttle mechanism so that the throttle is then closed by its return spring. In the construction shown, the brake lever 7 pivoted at 8 is formed with a guide 13 in which slides a rod 27 carrying a pedal 28 and adapted to control the engine throttle. The rod 27 is provided with a slot 30 engaging a roller 31 on the guide 13 and slides between rollers 36, 37 which allow the rod to pivot about the roller 31. A spring 33 connected to the lower end of the rod and the upper end of the guide urges the rod to its uppermost position as shown, in which it bears against the roller 36. The lower end of the rod carries a roller 40 bearing against a square block 24 adjustably secured by a bolt 23 to an arm 22 on a shaft 20 controlling the throttle (not shown). The brake lever 7 may act through mechanical connections 9 or hydraulic means 10 and is controlled by the usual return spring 14 which tends to keep the lever against a buffer 15. When the pedal 28 is depressed, the rod 27 slides downwardly in the guide 13, extending the spring 33 and acting through the roller 40 on the block 24 to open the throttle against the action of a spring 21. When the roller 31 on the guide 13 reaches the end of the slot 30 on the pedal rod 27, the pedal acts directly on the lever 7 and applies the brakes, At the same time the roller 40 rides over a rounded corner 26 of the block 24 and releases the throttle control so that the throttle is closed by its spring. The rate of opening of the throttle and the pedal position at which the throttle is released can be determined by adjusting the block 24 on its bolt 23. The throttle can be released at any part of the stroke of the pedal by pressing forwardly on the pedal so as to tilt it about the roller 31, as shown in broken lines, thus moving the roller 40 away from the block 24 and allowing the throttle to close. The block 24 may be replaced by a spring-loaded block 64, Fig. 9, adjustably carried by the arm 22. In the construction shown in Figs. 7 and 8, the throttle is controlled by a rod 49 slidable in a fixed guide or bearing 50 and having an arm 48 engaged by a roller 47 on a pedal part 45 slidablv mounted on the brake lever 7. The pedal part is provided with slots 51 engaging a roller 52 on the brake lever and is controlled by a, spring 55 and guided to some extent by a roller 53. When the pedal 28 is depressed, the roller 47 bears on the arm 48 and opens the throttle, the roller moving across the top of the arm until it finally passes the edge and allows the throttle to close. The brake is applied by depression of the lever 7 as soon as the roller 52 reaches the end of the slots 51. When the pedal is released the roller 47 rides back over a sloping face 57 of the arm 48 and passes above the arm ready to operate it again. The throttle may be closed at any moment by pressing the pedal 28 forwardly, thus rocking it about the roller 52 and carrying the roller 47 clear of the arm 48.