| 摘要 |
<p>AN INDICATOR-EQUIPPED DUAL-ELEMENT ELECTRIC FUSE of the Disclosure: A circuitinterrupting device has a stationary current-conducting member, a movable current-conducting member which has an initial position and a moved position and which has one end thereof adjacent one end of the stationary currentconducting member whenever it is in its initial position, a connector which accommodates the adjacent ends of the current-conducting members and which normally holds a mass of heat-softenable alloy in engagement with those adjacent ends, an indicator which is connected to the movable current-conducting member and which has an initial position wherein it is retracted and a moved position wherein it is extended, and a spring which can simultaneously move the movable current-conducting member and the indicator from their initial positions to their moved positions whenever the circuit-interrupting device opens the circuit. The adjacent ends of the current-conducting members extend into the connector, but each of those adjacent ends extends into that connector a distance less than one-half of the minimum distance through which the spring will move the indicator whenever the circuit-interrupting device opens the circuit, thereby making certain that a gap will exist between that connector and one or the other of those adjacent ends whenever the circuit-interrupting device opens the circuit.</p> |
