Bimetal circuit breaker

Details Bimetal circuit breaker Bimetal circuit breaker

1978-01-24

1979-06-26

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337111, 337379, H01H 6106

Patent

active

041591550

ABSTRACT:
A bimetal circuit breaker comprises a frame and a plate-like bimetal component which includes a base part, two U-shaped legs each having a first leg portion, a second leg portion and a U-shaped connecting portion. Each first leg portion is attached to the base part and diverges therefrom in a V shape. The circuit breaker further has a movable contact affixed to each second leg portion; a support tab attached to the base part and extending between the first leg portions; a support member attached to the frame and engaging a free end of the support tab for positioning the bimetal component in the frame; stationary contacts carried by the frame and cooperating with the movable contacts; and a rocker support held in the frame and engaging the base part in an over-the-center arrangement. The bimetal component and the rocker support have first and second stable positions in which the movable contacts are in engagement or out of engagement with the respective stationary contacts. The bimetal component and the rocker support are moved from the first stable position over the center and into the second stable position by the force generated by the deformation of the bimetal component caused by heat generated by an excess current passing through the bimetal component.

REFERENCES:
patent: 3238780 (1966-03-01), Doyle
patent: 3718162 (1973-02-01), Dafler et al.
patent: 3805207 (1974-04-01), Grimshaw

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