| 摘要 |
A bicycle braking system incorporates a pedal crankshaft operated brake actuator, a lost motion connection in the chain drive to the rear wheel of the bicycle, the lost motion being taken up by a highly progressive spring of sufficient strength to require a significant proportion of normal pedalling torque to overcome its action, and a brake incorporating a resilient stirrup supported at three points distributed around the rim of the rear wheel of the bicycle, the stirrup arms being subjected to a wedging action upon actuation of the brake causing brake shoes mounted on the stirrup to grip the rim of the wheel with a caliper action. |
