Patent GB-227818-A (GB)
Title: Brake operating device of steering wheels for vehicles
IPC: B60T11/04
Filed: 1925-01-01
Abstract: 227,818. Compagnie d'Applications MÚcaniques. Jan. 16, 1924, [Convention date]. Brakes, arrangement of; arrangements of hand and foot gear in conjunction with controlling- apparatus.-In a steering-wheel brake wherein the brake-actuating rod 11 is slidably supported by means of a ball joint 14 on the axle, and is connected by means of a universal joint 12 with the cam shaft 10, the parts are so disposed that the steering movements of the wheel with the brakes applied either do not affect the position of the point b on the arm 13 at which the braking stress is applied; or its movement is derived solely from the rotation of the rod 11, or solely from the forward or rearward movement of this rod. In the form shown in Fig. 1, the axis f of the rod 11 is at right-angles to the axis d of the steering-pivot, the angle between the axis e of the cam and the axis d is other than 90‹, and the axis m of the joint 12 about which the rod 11 pivots is parallel to the axis d when the brakes are applied. With this arrangement, steering of the wheels will not rotate the rod 11, and, when, as shown, the joint 12 is outside the axis d and the point b is above the ball joint c, its forward or rearward movement, as shown in Fig. 4, will not displace the point b. In the case when the joint 12 is in line with the axis d, the rearward and forward movements of the rod 11 are eliminated, so that the arm 13 can then be located at any point of the rod 11 without affecting the position of the point b when the wheels are steered. The result given by the arrangement shown in Fig. 1 may also be achieved by having the angle between the axes f, d other than 90‹, that between the axes e, d 90‹, and that between the axes m, d 90‹ with the brakes applied; or both the angles between the axes f, e and the axis d may be 90‹, and the axis m then be inclined at an acute angle to the axis d in the braking position. In a further form, where neither of the axes f, e is at right-angles to the axis d, the angle between the axes m, d may be so chosen that the rotative and forward or rearward movements of the point b are balanced. If, in either of the arrangements resulting in forward or rearward movement of the rod 11, the point b is located at b<1> or b<11>, Fig. 4, it will have a displacement during steering which will result in a differential braking action on the brakes of the two steering wheels. Arrangements are also described in which, as in Fig. 1, the point b has no rearward or forward movement, but wherein it is given a displacement due to a rotation of the rod 11 during steering. In the first form, where the ,angle between the axes f, d is 90‹, and that between the axes e, d is other than 90‹, the axis m is inclined to the axis d at any angle less than 90‹ according to the result required; when the angle between the axes f, d is other than 90‹ and that between the axes e, d is 90‹, that between the axis d and the axis of the universal joint perpendicular to the axis m may have any value up to 90‹; whilst when neither of the angles between the axes f, e and the axis d is 90‹, the axis m may be either parallel or perpendicular to the axis d in the braking position. A fitting 8, 9 is provided to take up the wear of the brake shoes, and a spring 15 to take up axial wear, which urges the members 11, 12, 10 to the left, a ball bearing 17 being provided against which the cam 10 bears.