Thermostatic control having electrically insulated heater element

Claim 1

A THERMOSTATIC CONTROL COMPRISING A CUP-SHAPED HOUSING DEFINING A SWITCH CHAMBER, A SWITCH MOUNTED IN SAID CHAMBER HAVING A FIXED CONTACT, A CANTILEVER MOUNTED CONTACT-CARRYING ARM HAVING A MOBILE CONTACT MOUNTED ON THE OUTER END OF SAID ARM IN OPERATIVE RELATION TO SAID FIXED CONTACT, A DISC SHAPED CLOSURE MEMBER FOR SAID SWITCH CHAMBER, A HIGH TEMPERATURE INSULATING DISC HAVING HIGH THERMAL CONDUCTIVITY SEATED ON THE OUTER SURFACE OF SAID CLOSURE MEMBER, ELECTRIC RESISTANCE MATERIAL DISPOSED ON THE SURFACE OF SAID DISC ADJACENT TO THE CLOSURE MEMBER, A BI-METALLIC DISC MOUNTED ON THE PERIPHERAL EDGE OF THE OPPOSITE SURFACE OF SAID INSULATING DISC HAVING RELATIVELY STABLE POSITIONS OF OPPOSITE CONCAVITY AND A SLIDABLE MEMBER CARRIED BY SAID CLOSURE MEMBER FOR ACTUATING SAID CONTACT-CARRYING ARM IN RESPONSE TO MOVEMENT OF THE BIMETAL DISC FROM OUTWARD TO INWARD POSITION OF CONCAVITY.