| 摘要 |
A mechanical system for operating functions for example, electrical switches on a programmed basis. An actuator movable past a follower in reciprocatory movement with the follower on one path in one direction and on another path in the reverse direction. One way mechanical gate to require change in travel path on reverse of reciprocation to preclude reversal of sequence regardless of reversal of movement. Ramp and platform to actuate and hold switch on programmed basis. Application example, sequential operation of electronic flash units in a photographic system.
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