Circuit breaker having an integrated power trap arm

Details Circuit breaker having an integrated power trap arm Circuit breaker having an integrated power trap arm

1983-06-24

1985-02-19

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

335175, H01H 7324

Patent

active

045008639

ABSTRACT:
A circuit breaker includes a fixed contact, a pivotable contact carrier having a movable contact for engagement with the fixed contact, a pivotable trip arm, a latch adapted to latch the trip arm, a thermostatic element adapted to engage the latch, and an overcenter spring coupled between the contact carrier and the trip arm. In the event of an overcurrent, the latch releases the trip arm, and the overcenter spring retracts the contact carrier, disengaging the contacts. An improved trip arm includes an integrally formed, perpendicularly extending lug which strikes the contact carrier, providing an impact force to disengage the contacts in the event of welding of contacts together.

REFERENCES:
patent: 2627564 (1953-02-01), Ericson
patent: 4032875 (1977-06-01), Belttary

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