Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1985-03-19
1986-12-16
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337 68, H01H 7104, H01H 7116
Patent
active
046300201
ABSTRACT:
A circuit breaker having a manually-resettable handle which extends when the breaker is tripped by a circuit overload. An indicator lamp housed within the handle is lit when an overload condition occurs. The handle also has a lens for allowing light from the lamp to be visible. The far end of the handle has a wedge-shaped member for breaking the main circuit between two main contacts in the circuit breaker when an overload occurs. The wedge-shaped member also has two conductive sheets on its upper and lower surfaces for completing the circuit for the indicator lamp when the overload condition occurs. When the handle moves as a result of a circuit overload, the wedge-shaped member of the handle moves in between the main contacts in the circuit breaker and separates them thereby breaking the main circuits. At the same time that the main circuit contacts are being opened, the conductive sheets on the upper and lower surfaces of the wedge-shaped handle member complete the circuit for the indicator lamp thereby indicating the presence of an overload and a tripped circuit breaker.
REFERENCES:
patent: 2254347 (1941-09-01), Blakesley
patent: 3311725 (1967-03-01), Butler et al.
patent: 4342979 (1982-08-01), Phillips
Bloom Leonard
Broome Harold
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