Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1987-11-03
1988-06-28
Broome, H.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337102, 29622, H01H 6102, H01H 3752
Patent
active
047542519
ABSTRACT:
A housing has a switch chamber in which an electric switch is placed and a recess in which is received a snap acting, thermally responsive disc which actuates and deactuates the switch upon snapping from one configuration to another. A thermal biasing assembly used to modify the operating temperature of the disc has a pair of cylindrical film type resistors electrically connected in parallel circuit relation and physically connected to a pair of rivets. Resistors of a rating chosen for a particular application are dropped into the recess with the leads of the resistors received in bores provided in the housing. A rivet is then inserted into each bore making good electrical connection with the leads without welding by deforming them a selected amount. The rivets are attached to suitable terminals and the disc is then placed over the thermal biasing assembly to provide a multiple temperature operating thermostat.
REFERENCES:
patent: 4533894 (1985-08-01), Bishop et al.
patent: 4591820 (1986-05-01), Ruszczyk et al.
Brown Ronald W.
Ting Youn H.
Broome H.
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
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