Patent GB-161364-A (GB)
Title: Improvements in motor-cycle, cycle, and analogous saddles or seats
IPC: B62J1/04
Filed: 1920-01-29
Abstract: 161,364. Brooks & Co., Ltd., J. B., and Brooks, B. Jan. 29, 1920. Saddles; spring devices.-The top of a motor or other cycle or analogous saddle or seat is mounted at each side upon two, three, or more parallel-motion cantilever laminated leaf springs which are carried by the frame or carrier of the machine or by a part attached thereto. Means may be incorporated for adjusting the tension on the springs, for adjusting the inclination of the saddle top, and for adapting the device to machines of different widths. As shown in Fig. 1, the top 1 is carried by the front ends of springs 10, which are pivoted at about the middle to the carrier 7 and at their rear ends abut against cross-pins or stops 24, 25. The centres of the springs are enclosed in inverted U-shaped clips 13, which are pivoted to the front bolts 12 serving to fix plates or brackets 11 to the carrier stay. One or more rubber or metal stops 28 may be provided to limit the upward movement of the springs. To provide for adjustment to suit the width of the carrier frame, the top 1 is secured to angle-members 14 by bolts engaging with elongated slots in the horizontal portions of these members, and the inclination of the top is adjustable by slackening the nuts 17, pivoting the angle-members about the upper bolts, and then re-tightening the nuts. For adjusting the tension on the springs, the pins 25 are carried by the U-shaped ends 24 of a screw-threaded stem 23 which passes freely through the hole 20 of a bracket clamped to the rear stay of the carrier, the adjustment being effected by upper and lower nuts 26 having conical bosses to engage with corresponding seatings at the ends of the hole 20. The two brackets 14 may be replaced by a single inverted U-shaped member, and quarter-elliptic springs terminating in U-shaped clips upon the front vertical stay may be used in the place of the long springs 10. A dash-pot or other retarding-device may be arranged diagonally between each pair of leaf springs. Instead of using quarter-elliptic springs, springs of the construction shown in Fig. 8 may be employed. These springs comprise one or more leaves 29 extending from the saddle to the carrier or other part, the upper face at one end and the under face at the opposite end being built up with short laminations 30. In a still further modification shown in Fig. 11, the middle of the top carries depending brackets 31, which are pivoted to the centres of parallel-motion springs 32; at the back, these springs are linked together and at the front they are connected adjustably to a bracket 33 adjustably connected at 36, 37 to a pillar 34. The bracket may, however, be carried by the usual L-pin or by the cycle frame, and instead of the rear portion of the top being connected to the rear end of the upper springs 32 by helical springs 35, links or the like may be employed. According to one Provisional Specification, instead of the laminated springs being fixed to the vertical stay of the carrier, as shown in Fig. 1, they may be fixed to the down tube or seat pillar of the frame, or to a bracket on the L-pin, the springs preferably extending rearwards and the top being carried by their rear ends.