Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1981-04-17
1982-09-21
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
335 8, 335189, H01H 7500, H01H 7700, H01H 8300
Patent
active
043509657
ABSTRACT:
A circuit breaker for interrupting current through plural electrical circuits has a separate current responsive circuit path for each electrical circuit. Each path includes a manually operable latching mechanism capable of engaging and disengaging a pair of electrical contacts on demand and further includes a circuit responsive releaseable latch mechanism for automatically disengaging the pair of contacts. A common manually activated handle is connected to each of the latching mechanisms to enable manual and automatic operation of the breaker for simultaneous engagement or disengagement of the paired electrical contacts. The connection of the common handle to the several latching mechanisms encompasses a trip bar arranged for both pivotal movement about an axis parallel to the axis of the handle and sliding movement relative to guides within a common insulating case of the circuit breaker. The disclosed breaker assures tripping of all latching mechanisms, instantly, upon release by any one or more of the circuit responsive mechanisms. The pivotal and sliding movement of the trip bar eliminates high frictional forces between the linkage portions and permits the use of a minimal overcenter angle to latch the breaker.
REFERENCES:
patent: 2923788 (1960-02-01), Norden
patent: 2923795 (1960-02-01), Martin
patent: 4146855 (1979-03-01), Schultz et al.
Broome Harold
Federal Pacific Electric Company
Hollander Roy F.
Stanley Ronald R.
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