Thermally responsive switch devices

Claim 1

A THERMALLY RESPONSIVE SWITCH DEVICE OF THE TYPE HAVING ONE CONSTANT AND ONE VARIABLE OPERATING CHARACTERISTIC, SAID DEVICE HAVING HOUSING MEANS AT LEAST ONE PORTION OF WHICH COMPRISES AN INSULATOR MEMBER FORMING ONE END OF THE HOUSING, SAID INSULATOR MEMBER ALSO SUPPORTING A RELATIVELY FIXED CONTACT IN SAID HOUSING FOR COOPERATION WITH SAID MOVABLE CONTACT ARM, A SNAP ACTING MECHANISM IN SAID HOUSING INCLUDING A TOGGLE MEMBER PIVOTED TO SAID INSULATOR MEMBER FOR MOVEMENT ABOUT A FIRST AXIS BETWEEN FIRST AND SECOND POSITIONS FOR ACTUATING SAID MOVABLE CONTACT ARM, A LEVER PIVOTED IN SAID HOUSING FOR MOVEMENT ABOUT A SECOND AXIS AND CONNECTED TO SAID TOGGLE MEMBER BY AN OVER-CENTER ACTING SPRING, A TEMPERATURE RESPONSIVE POWER ELEMENT FOR MOVING SAID LEVER TO EFFECT SNAP MOVEMENT OF SAID TOGGLE MEMBER BETWEEN SAID FIRST AND SECOND POSITIONS, ADJUSTABLE BIASING MEANS URGING SAID LEVER IN ONE DIRECTION AGAINST SAID POWER ELEMENT, SAID ADJUSTABLE BIASING MEANS INCLUDING A SECOND LEVER PIVOTED TO A WALL OF SAID HOUSING FOR MOVEMENT ABOUT AN AXIS TRANSVERSE TO SAID SECOND AXIS, SPRING MEANS CONNECTING SAID SECOND LEVER AND THE FIRST MENTIONED LEVER, AND CONTROL MEANS INCLUDING A ROTARY CAM ENGAGING SAID SECOND LEVER FOR POSITIONING THEREOF TO SELECT SAID VARIABLE OPERATING CHARACTERISTIC, AND MEANS CONNECTING SAID TOGGLE MEMBER AND SAID CONTROL MEANS FOR CHANGING ONE OF SAID FIRST AND SECOND POSITIONS IN ACCORDANCE WITH POSITIONING OF SAID SECOND LEVER WHEREBY SAID CONSTANT CHARACTERISTIC IS UNAFFECTED BY SAID SELECTION OF SAID VARIABLE OPERATING CHARACTERISTIC.