Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1999-09-02
2000-11-28
Tolin, Gerald
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337 38, 337 39, 337 59, 337 85, 337112, 337113, 337334, H01H 3702, H01H 3732, H01H 3746, H01H 3752
Patent
active
061541168
ABSTRACT:
The thermal circuit breaker and switch has fixed and movable contacts, and non-conductive contact and trip actuators. The movable contact is provided on the free end of a lever arm that normally biases the movable contact toward its open position. The contact actuator transfers movement from a rocker or operator to the movable contact arm when no overload condition exists. The trip actuator is L shaped and rotates in a socket when engaged by a thermally sensitive bi-metallic element so as to allow one end of the contact actuator to float freely, allowing the movable contact arm's bias to open the circuit. The bi-metallic element is so positioned as to engage and rotate the trip actuator only when the bi-metallic element is deformed due to an overheat condition that occurs with an overcurrent. A compression spring acts between the upstanding legs of the trip actuator and the underside of the rocker thus biasing the rocker to the `off` position and biasing the trip actuator to the `reset` position. The rocker employs hooks or posts to engage and position the contact actuator to the reset position after being tripped or manually switched off.
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Tolin Gerald
Vortman Anatoly
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