Felgenbremse, insbesondere fuer Fahrraeder

摘要

959,199. Cycle brakes. O. PLETSCHER, and T. PLETSCHER, [trading as GEB. PLETSCHER]. Sept. 13, 1960 [Sept. 18, 1959], No. 31571/60. Heading B7E. A cycle brake has a pair of brake shoes,' each articulated to a jaw of a brake-tong, which, when braking, move under the influence of frictional force on paths converging towards the plane of the wheel, the brake shoes being guided on said paths by tong jaws which pivot about tong pivot-pins inclined with respect to the plane of the wheel or perpendicular to the direction of the frictional force. Fig. 1 shows a friction pad 11 mounted in a holder 6 which rocks in a plane tangential to the wheel-rim circle against a spring 8 about a pivot 7. The pivot 7 is supported between the cheeks 4 of a U-shaped guide-piece secured at 1 to the end a brake calliper-arm (shown in section at 2). In Fig. 2 (not shown), the pad-holder is crimped in the guide-piece within which it is free to tilt against the restoring force of a rubber pad. The convergent motion of the pads may be achieved additionally and/or alternatively by causing the calliper-arms 301 to converge rearwardly about pivots 31 as in Fig. 4 and Fig. 11 (not shown). In other embodiments, as in Fig. 3 (also in Figs. 8, 12 and 13, not shown), the arms 24 have sufficient play to rock about their spindle 25. In the embodiment in Fig. 3, the pads are caused to converge by quick plates 21 on the arms 241 whose surfaces 21 press against the wheel-forks 23 and a spring 27 restores their position after use.