Dual circuit temperature controlled switch
AssigneeGeneral Electric Company
InventorJames P. Frank
Life of this patent
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Abstract
A temperature responsive switch includes a housing, an actuator arm for movement in response to temperature conditions, a movable contact, and an adjustable contact connected to a auxiliary terminal for completing an auxiliary circuit. The movable contact engages and disengages the auxiliary contact to cycle a first element on and off in response to exceedingly large temperature swings a specified location, and also engages a stationary contact to complete a main circuit and cycle a different electrical element on and off in response to relatively modest changes in temperature changes at the same specified location.
Claims23
A condition responsive electric switch comprising:
- a housing;
- an actuator arm pivotally mounted within said housing, said arm pivoting in response to fluid communication with environmental conditions outside said housing;
- a movable contact communicating with said actuating arm;
- and
- an adjustable auxiliary contact for engagement with said movable contact for opening and closing an auxiliary circuit in response to movement of said actuator arm, wherein said auxiliary contact comprises a first end and a second end, at least one of said first and second ends comprising a depressed surface.
A condition responsive electric switch comprising:
- a housing;
- first and second terminals extending through said housing;
- first and second electrical contacts within said housing and connected to said first and second terminals, at least one contact moveable between an open position breaking a first electrical circuit through said first and second terminals and a closed position completing an electrical circuit through said first and second terminals in response to fluid communication with environmental conditions outside said housing;
- an actuator arm pivotally mounted within said housing;
- a spring switch element within said housing for separating and engaging said first and second electrical contacts in response to movement of said actuator arm;
- a third contact within said housing and positioned for engagement with said movable contact;
- said third contact comprising a first end and a second end, at least one of said first and second ends comprising a depressed surface, and wherein a position of said third contact is adjustable;
- and
- a third terminal extending through said housing and connected to said third contact for completing a second circuit through said first terminal and said third terminal in response to movement of said actuator arm.
Dependencies are inferred from the claim text.