GB460180A - Improvements relating to the braking of motor vehicles - Google Patents

Abstract

460,180. Controlling motor vehicles. PEYRUQUEOU, P. May 17,1935, No. 14472. Convention date, May 17, 1934. [Class 79 (v)] [Also in Group XXXIV] In means for controlling motor vehicle brakes by the accelerator pedal, movement of this pedal R to the extent of angle A beyond the closed-throttle position is permitted by a telescopic device 3 in the connection to the throttle and during this movement a contact 1 carried by the pedal moves over contacts 2 of a rheostat whereby the brakes are gradually applied. As shown, the brakes are applied by a disc 8 connected to the brakes at 10, 11, adapted to engage a disc 7 driven from the vehicle drive shaft 4, the disc 8 being attracted to the disc 7 when a winding 9 in circuit with the rheostat is energized. The circuit is adapted to be broken by contacts on the gear lever to prevent application of the brakes during gear changes and also by contacts actuated by the ignition key to avoid waste of current when the vehicle is stopped. The Specification as open to inspection under Sect. 91 comprises also the following subjectmatter : The brake may be operated by a servomotor actuated by engine suction. The servomotor may be controlled by a slide valve connected by a friction coupling with the accelerator pedal so that the brake is applied whenever the pedal is moved in the throttleclosing direction and released by movement in the other direction. The servomotor, Fig. 3 (Cancelled), may have three stages or compartments, the pipes of which may be connected to pipes f, f<1>, f<11> of the graduator shown in Fig. 4 (Cancelled). This comprises a piston a subject to the suction through passage d and to springs e, e<1>, e<11> of different lengths which are successively engaged by the piston as the suction increases to connect the several compartments to suction. The braking action is thus graduated according to the extent to which the accelerator is raised and to the speed of the vehicle. An additional stopping device is provided for effecting complete stopping of the vehicle. As the braking action disappears at low speeds, an additional stopping device is provided for effecting complete stopping of the vehicle. The pedal of this device may be mechanically connected to the piston a to bring the servomotor, Fig. 3 (Cancelled), into action. The braking devices may be used in combination with transmission systems having a free-wheel, automatic declutching or a pre-selector gearbox. In the latter case, the braking action may be eliminated when declutching to effect the speed gear change. A suction servomotor for operating the brakes may be controlled electrically by a contact actuated by the accelerator pedal through a friction coupling. The brake servomotor may be operated by oilpressure furnished by the oil pump of the motor and controlled by a valve actuated by the accelerator pedal. This subject-matter does not appear in the Specification as accepted.