Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1980-08-29
1982-04-20
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
335 43, 335 45, H01H 7116
Patent
active
043261833
ABSTRACT:
An electric circuit breaker including a U-shaped bimetal operably associated with a trip crossbar to effect rotation of the crossbar and subsequent opening of breaker contacts in response to heating of the bimetal to a predetermined temperature by the passage of an electrical current of a selected magnitude therethrough. The bimetal provides self-contained adjustment through the use of a calibration screw threaded into the lower leg of the bimetal which exerts force through an insulating member to the upper leg of the bimetal permitting ready calibration of the bimetal according to ampere rating of the particular circuit breaker.
REFERENCES:
patent: 2370024 (1945-02-01), Dyer
patent: 2406325 (1946-08-01), Dorfman
patent: 2667548 (1954-01-01), Page
patent: 3341791 (1967-09-01), Leonard
Broome Harold
Golden Larry I.
Guttman Richard T.
Lesser Norton
Square D Company
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