| 摘要 |
A circuit interrupter with an accessory case socket into which an accessory bell alarm member is disposed. A two-piece lever arrangement is provided in the bell alarm accessory case between the micro-switch button thereof and th e operating mechanism of the circuit breaker. In the first stage of operation the operating mechanism rotates the entire two-piece member as a unit until the bell alarm button has been completely depressed, after which overtravel of the operating mechanism is accommodated by rotational movement of only one o f the members on a common axis against the force of a hub located torsion spri ng.
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