Circuit breaker mechanism

Details Circuit breaker mechanism Circuit breaker mechanism

1994-07-06

1996-04-09

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

335 23, H01H 900

Patent

active

055065562

ABSTRACT:
A circuit breaker actuating mechanism has a magnetic frame and a load coil, with a magnetic pole piece which is aligned with the axis of the coil. An elongate L-shaped armature pivots on the magnetic frame and has a head which moves transversely relative to the axis of the coil towards the pole piece. The pole piece is typically circular in section, and the head of the armature has a circular recess which matches the shape of the pole piece. The head of the armature has a pair of projections which extend relatively close to the pole piece when the armature is in a retracted position, increasing the initial attractive force between the pole piece and the armature. The mechanism is relatively simple and economical to manufacture, and offers an improved pull-in force.

REFERENCES:
patent: 3566320 (1971-02-01), Bakes
patent: 5066935 (1991-11-01), Harper

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