Circuit breaker having an electrodynamically opening contact sys

Details Circuit breaker having an electrodynamically opening contact sys Circuit breaker having an electrodynamically opening contact sys

1988-03-18

1989-06-20

Goldberg, E. A.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335147, 335195, H01H 7500

Patent

active

048412660

ABSTRACT:
A circuit breaker comprises a housing; a stationary contact mounted in the housing; an operating shaft disposed in the housing and rotatable about a first axis of rotation; and a movable contact including a contact arm pivotally held in the operating shaft for rotation about a second axis of rotation from an on position into a tripped position. By rotating the operating shaft about the first axis of rotation, the contact arm is movable into and out of the on position and an off position. The contact arm further has a terminus including a rounded corner and an adjoining rounded engagement face. There is further provided a structural unit stationarily supported in the housing and comprising a spring having a stationarily supported first end and a second end and a transfer lever having an end pivotally supported for rotation about a third axis of rotation. The lever is disposed between the second end of the spring and the terminus of the contact arm and engages the rounded corner or the rounded engagement face dependent on the position of the contact arm for transmitting a torque from the spring to the contact arm about the second rotary axis.

REFERENCES:
patent: 4219790 (1980-08-01), Batteux et al.
patent: 4540961 (1983-09-01), Maier
patent: 4562419 (1985-12-01), Preuss et al.

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