Patent GB-378164-A (GB)
Title: Improvements in a brake
IPC: F16D65/14
Filed: 1931-06-30
Abstract: 378,164. Brakes, frames, suspensions, and detachable wheels for motor vehicles. FORD MOTOR CO., Ltd., 88, Regent Street, London.-(Assignees of Ford, H. ; Dearborn, Michigan, U.S.A.) June 30, 1931, No. 18915. Convention date, Aug. 4, 1930. [Classes 103 (i) and 144 (i).] The brake operating mechanism of motor vehicles is substantially entirely enclosed to protect it from dirt and water. An equalized four wheel brake system is described wherein the brake rods extend through radius rods for the front and rear axles. Operating mechanism for the shoes of the front and rear brakes is described. Tubular radius rods 16 extend from the part 46 of the tubular front axle 13 to a hollow transverse member 22 which has a universal joint connection 23 with a transverse frame member 11 connected to the main side frame members 10. An equalizing bar 55 disposed in the member 22 is connected at its middle point to a pull-rod 57 passing through the joint 23 and at its ends by flat steel rods 54 passing through the radius rods 16 to bell cranks 48, Fig. 4, mounted in the axle 13. A rod 49 connected to each bell crank projects through the axle 13, Fig. 1, and is pivoted to an arm 44 ball-jointed to a wedge 35 arranged to slide radially, guided by a fixed pin 36, between rollers on the ends of the brake shoes 33, Fig. 2. A roller 43 on the end of the rod 49 runs on an inclined track formed on the end of the fixed king-pin 24. When the rod 49 is thrust outwardly the wedge 35 applies the shoes to the drum 37. An adjusting device 32 for the shoes is provided. A flexible protecting casing 52 for the end of the rod 49 extends from the axle 13 to the cover-plate of the brake or it may be replaced by a rigid tubular member provided with a hemi-spherical end slidably fitting a hole in the cover-plate. Tubular radius rods 17, Figs. 7, 9, and 11, extend from housings 79 on the anchor plates 65 of the rear brakes to a housing 20 to which the torque tube 21 is also secured. A shaft 60, Figs. 5 and 7, in this housing has an arm 62 connected to the front brake rod 57 and an arm 62<1> attached to an equalizing bar 63 to the ends of which flat rods 64 are pivoted, each of these rods passing through one of the radius rods 17 to an arm 78, Fig. 11, disposed in the housing 79 and secured to a shaft 76 passing through the anchor plate 65. The end of the shaft 76 within the brake drum carries a cam or projection that engages a wedge corresponding to the wedge 35, Fig. 2, for expanding the rear brake shoes. The shaft 60, Figs. 5 and 7, has a third arm connected by rod 67 to the pedal 68 which thus applies all four brakes. Independent application of the brakes is obtained by a shaft 61 connected by an arm and link 72 to a hand-lever 73 and provided with arms 75 engaging the ends of the rods 64. The upper end of the king-pin 24, Fig. 1, serves as a perch for the front spring 15 which is secured at its other end to the end cross frame member 12. The brake drum 37, Fig. 1, is secured to the hub 28 and the wheel is mounted on the drum by bolts 38, the spokes 41 extending from the hub shell 40 serving only to keep the wheel rim circular.