| 摘要 |
A mechanism (10) for actuating an electric circuit is shown including a switch box (11) fastened to a housing (26) to which a cover (60) is movably mounted. The threaded stems (54) of four de-energizing momentary switches (52) extend through and are held to the front wall (32) of the housing (26). The cover (60) includes a sleeve extending rearwardly of its broad surface front wall (62) and slideably received in a tubular extension (46) of the housing (26). A flange (72) on the sleeve abuts with the ledges (50) formed in the tubular extension (46) to prevent movement therebeyond. The cover (60) can be pushed against the bias of coil springs (74) arranged concentrically around the stems (54) such that any point of the broad surface front wall (62) can be moved in an actuation direction to slide the actuation pins (58) slideable in the stems (54) of one or more of the de-energizing switches (52) to de-energize the electric circuit. The electric circuit is energized by actuating an energizing momentary switch (18) mounted to the switch box (11).
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