Thermal circuit protective device

Details Thermal circuit protective device Thermal circuit protective device

1993-02-11

1993-11-23

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337 79, 337 91, H01H 7116

Patent

active

052648176

ABSTRACT:
In a single housing that looks like a standard rocker switch a thermally responsive movable contact element is mechanically opened by the rocker in a "switch" mode, or opened in response to an overcurrent condition in a circuit protection mode. Both conditions result in a trip flag being moved between the movable and a fixed contact. The trip flag rests lightly on the movable contact when the device is ON and during reset motion the trip flag is so mounted in the switch case that it reaches such a reset position only after the movable contact has returned to its ON or closed condition. The rocker has skirts that define cam teeth cooperable with cam teeth on the trip flag. The housing defines slots for receiving projecting portions of the trip flag to define a movable pivot for the trip flag to so reduce the forces and/or moments of the trip flag as it "rests" on the movable contact.

REFERENCES:
patent: 5089799 (1992-02-01), Sorenson

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