Surface sensing bimetal thermostatic switch

Claim 1

A THERMOSTATIC SWITCH COMPRISING AN ELECTRICALLY AND THERMALLY CONDUCTIVE HOLLOW BODY CLOSED AT ONE END, AND SAID BODY HAVING AN INTERGRAL FLAT EXTENSION OF SUBSTANTIAL AREA FOR MOUNTING TO AN OBJECT, THE TEMPERATURE OF WHICH IS TO BE SENSED OR CONTROLLED, ONE OR MORE PAIRS OF OPPOSED CONCAVE-CONVEX BIMETALS, THE CENTER OF ONE OF SAID BIMETALS SEATED AT THE CLOSED END OF THE BODY AND RESILIENTLY ENGAGED WITH THE OTHER OF SAID BIMETALS, A MOVABLE INSULATOR SEATED WITHIN THE HOLLOW BODY RESILIENTLY ENGAGED WITH ONE OF THE BIMETALS, THE MOVABLE INSULATOR HAVING A BORE, MEANS WITHIN THE HOLLOW BODY FOR MAINTAINING THE MOVABLE INSULATOR IN RESILIENT ENGAGEMENT WITH THE BIMETAL, A STATIONARY INSULATOR SEATED WITHIN THE OPPOSITE END OF THE BODY, THE STATIONARY INSULATOR HAVING A BORE, AN ELECTRICALLY CONDUCTIVE, INTERNALLY THREADED ANNULAR COLLAR SEATED WITHIN THE BORE IN THE STATIONARY INSULATOR, A THREADED CALIBRATION SCREW POSITIONED WITHIN THE COLLAR, AN ELECTRICALLY CONDUCTIVE ROD MOUNTED WITHIN THE HOLLOW BODY HAVING ONE END SECURED TO THE CALIBRATION SCREW AND THE OPPOSITE END SLIDABLY POSITIONED WITHIN THE BORE IN THE MOVABLE INSULATOR, AND PROVIDED WITH A RESILIENT CONTACT TO PREVENT PERMANENT SET OF BIMETALS AND CONSEQUENT CALIBRATION DRIFT FOR ELECTRICAL ENGAGEMENT WITH OPPOSED CONTACT ON ADJACENT BIMETAL IN RESPONSE TO THERMALLY INDUCED CHANGES IN THE CURVATURE OF THE BIMETALS, AND AN EXTERNAL ELECTRICAL CONTACT MEMBER ELECTRICALLY CONNECTED TO THE COLLAR BUT ELECTRICALLY INSULATED FROM THE BODY.