摘要:
An overload circuit breaker which has a main pushbutton which when depressed closes the circuit breaker and has a central cavity in its outer end, and a second pushbutton which, when both pushbuttons are depressed, is held arrested fully within the cavity and, when the main pushbutton is released, is likewise released and then projects for a certain distance out of the cavity and thus outwardly beyond the end surface of the main pushbutton. The end surfaces of both pushbuttons are preferably of the same color so that, when depressed, the second pushbutton will not be noticeable, but the peripheral surface of the second pushbutton is preferably of a different color contrasting with the color of the main pushbutton when the latter is in its outer off position and the second pushbutton projects from the main pushbutton.
摘要:
A plunger type relay for locking the door of a washing machine. Such a relay includes first and second bimetal strips, at least one heating winding for heating the bimetal strips, a fixed contact and a movable contact actuatable by the second bimetal strip to co-operate with the fixed contact to short circuit the heating winding.
摘要:
An excess current switch has a thermal and/or electromagnetic trip, a pivotally mounted actuating member, a bell crank connecting the actuating member with a movable contact carrier and a locking lever for locking the bell crank in an extended position to establish a switched on position of the switch. The switch is further provided with a spring biased latch having a retaining portion which during switch on engages a stop prior to the contact carrier reaching its switched on position. The latch is subsequently disengaged from the stop by an arm of the actuating member to allow the contact carrier to move to its switched on position. When a thermal and/or electromagnetic trip occurs a release lever actuates the locking lever to move it to a release position to thereby allow the bell crank to assume its switched off position and thus allow the switch to break. Such a switch provides for instantaneous switch on and off which results in a lengthening of the life of the contacts of the switch.