Circuit breakers

Details Circuit breakers Circuit breakers

1982-12-16

1984-08-07

Hartary, Joseph W.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 37, 337 54, H01H 7512

Patent

active

044646410

ABSTRACT:
A circuit breaker having an overload mechanism including an elongated bimetallic element having one end pivotally mounted in the circuit breaker housing and the other end pivotally positioned at one end of an armature element. The armature element has a latching surface engaging a trip arm to hold it in a set position. An overload current causes the bimetallic element to bend. Since the ends of the bimetallic element are constrained, its central portion moves causing the armature element to pivot disengaging its latching surface from the trip arm. The released trip arm pivots to a tripped position causing the breaker contacts to be opened.

REFERENCES:
patent: 2732455 (1956-01-01), Ericson et al.
patent: 3566318 (1971-02-01), Gelzheiser et al.

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