Mechanical digital stopwatch

摘要

A mechanical spring-powered hand-held digital stopwatch having a gear-operated decade counter display assembly, a spring-powered windup mechanism adapted to reset the counter during winding by means of a unidirectionally activated ratchet assembly, and a cam adjustable timing escapement mechanism, the escapement mechanism including an escapement gear actuating a balance through a limited pivotal angle, the angle of pivoting being governed by cam means interposed between a pair of arms carried by the balance.