Circuit breaker

Details Circuit breaker Circuit breaker

1982-12-27

1984-09-18

Goldberg, E. A.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 23, H01H 7512

Patent

active

044726961

ABSTRACT:
A circuit breaker having an overload mechanism including a support member mounted in the circuit breaker housing. One end of an elongated bimetallic element is fixed to one end of the support member. An armature element is mounted at one end to the one end of the bimetallic element and its other end has a latching surface engaging a trip arm to hold it in a set position. The support member has a reference surface adjacent to its other end and the trip arm is biased against it. An overload current causes the other end of the bimetallic element to deflect, moving the other end of the armature element with it and disengaging its latching surface from the trip arm. The released trip arm pivots to a tripped position causing the breaker contacts to open. The dimensional relationships between the reference surface and the latching surface determine the tripping characteristics of the circuit breaker.

REFERENCES:
patent: 2611052 (1952-09-01), Platz et al.
patent: 2953661 (1960-09-01), Hammerly et al.
patent: 3030470 (1962-04-01), Hargreaves
patent: 3566318 (1971-02-01), Gelzheiser et al.
patent: 3566326 (1971-02-01), Middendorf et al.
patent: 4047134 (1977-09-01), Maier et al.

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