Marvin C Barnes182 Als Dr, Bedford, KY 40006

4495481, Jan 22, 1985

Jun 30, 1982

6/393810

Colin D. Hickling - Frankfort KY
Marvin Barnes - Stamping Ground KY

Trigometer, Inc. - Frankfort KY

H01H 3712
H01H 3752

337349

An electric switch that is temperature responsive is provided for operation in a temperature range that is substantially above normal ambient temperature. A pair of contacts are mounted on respective first and second spring members. The second spring member includes a bimetal compensating portion at the distal end thereof. The second contact is mounted on the compensating portion so that upon increasing the temperature of the switch structure, the second contact moves toward engagement with the first contact to eliminate initial overshoot and to compensate for variable contact weld size between the contacts. An operating bimetal assembly in direct contact with the heated surface being monitored is used to break the contacts. The bimetal assembly includes a bimetal base element and a metal element butt-welded to the distal end thereof. The metal element carries a ceramic button to engage the first or upper spring member to move the first contact.