Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1994-05-25
1995-09-26
Picard, Leo P.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337 59, 337 52, 337 91, 200 6119, H01H 7116, H01H 6100, H01H 2704
Patent
active
054537258
ABSTRACT:
An overcurrent breaker switch includes an upper housing including a lever block with a push rod and a lower housing engaged with the upper housing. First and second blades are mounted to the lower housing, the second blade having a dual metal plate mounted thereon. A lever plate base is mounted in the lower housing and has a first end for releasable electrical connection with the dual metal plate and a second end. A conductive lever plate is pivotally mounted to the second end of the lever plate base and actuatable by the push rod under operation of the lever block. The conductive lever plate has a first end for releasable electrical connection with the first blade and a second end on which a pressing piece is formed. An insulating plate is mounted between the lever plate base and the dual metal plate and has an insulating piece below the pressing piece of the conductive lever plate. A spring is mounted under the insulating piece to provide an upward force. When switch is under an overload condition, the dual metal plate disengages with the lever plate base and the insulating plate is moved upwardly under action of the spring thereby breaking the circuit.
REFERENCES:
patent: 4068203 (1978-01-01), Unger
patent: 4363016 (1982-12-01), Unger
patent: 4528538 (1985-07-01), Andersen
patent: 4833439 (1989-05-01), Bowden
patent: 5021761 (1991-06-01), Stack
patent: 5248954 (1993-09-01), Chiang
Kuo Shou-Chi
You Long-Cheng
Picard Leo P.
Ryan Stephen T.
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