Shock absorber for circuit breaker

Details Shock absorber for circuit breaker Shock absorber for circuit breaker

1997-04-29

1998-09-08

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 35, 335 46, 335176, H01H 7510

Patent

active

058050388

ABSTRACT:
A circuit breaker has a shock absorber to prevent nuisance tripping which results from shock generated during ON to OFF operation of the circuit breaker. The shock is primarily caused by a snap action which occurs within the operating mechanism of the circuit breaker when the handle is moved from the ON to OFF position. The snap action results from the circuit breaker employing, as part of the operating mechanism, a toggle mechanism within an over center tension spring as a means for imparting motion in the operating mechanism. By strategically positioning the shock absorber for engagement with the operating mechanism when the circuit breaker is in the OFF position, the shock may be effectively absorbed thereby preventing the undesirable nuisance tripping.

REFERENCES:
patent: 3849747 (1974-11-01), Mrenna et al.
patent: 4263492 (1981-04-01), Maier et al.
patent: 4267419 (1981-05-01), Maier et al.
patent: 4481491 (1984-11-01), Heft et al.
patent: 4891617 (1990-01-01), Beatty, Jr. et al.
patent: 4933653 (1990-06-01), Mrenna et al.
patent: 5008645 (1991-04-01), Mrenna
patent: 5430422 (1995-07-01), Gibson

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