Electric switch having improved calibration and adjusting means

Claim 1

AN ELECTRICAL SWITCH COMPRISING A BASE FORMED OF ELECTRICALLY INSULATING MATERIAL, A FIRST ELECTRICALLY CONDUCTIVE TERMINAL MOUNTED ON SAID BASE; A FIRST ELECTRICAL CONTACT CARRIED BY SAID FIRST TERMINAL; A SECOND ELECTRICALLY CONDUCTIVE TERMINAL MOUNTED ON SAID BASE; SAID SECOND TERMINAL HAVING A FIRST PORTION CONNECTED TO SAID BASE AND A SECOND PORTION OVERLYING SAID BASE AND EXTENDING AT AN ANGLE TO SAID FIRST PORTION; AN ELONGATED SNAP ACTING THERE MALLY RESPONSIVE ELEMENT HAVING A DEFORMED PORTION THEREIN RESPONSIBLE FOR ITS SNAP ACTION, A WELDING SLUG MOUNTED ON SAID ELEMENT ADJACENT ONE END THEREOF; SAID SLUG HAVING PORTIONS PROJECTING FROM OPPOSITE SIDES OF SAID ELEMENT, ONE OF SAID PORTIONS THICKER THAN SAID THERMALLY RESPONSIVE ELEMENT AND WELDED TO SAID SECOND PORTION OF SAID SECOND TERMINAL THEREBY CANTILEVER MOUNTING SAID THERMALLY RESPONSIVE ELEMENT ON SAID SECOND PORTION IN SPACED RELATION THERETO PREVENTIG DELETERIOUS EFFECTS ON THE CALIBRATION OF SAID THERMALLY RESPONSIVE ELEMENT, SAID ELEMENT ELECTRICALLY CONNECTED TO SAID SECOND PORTION OF SAID SECOND TERMINAL; A SECOND ELECTRICAL CONTACT ELECTRICALLY MOUNTED ON THE OTHER END OF SAID ELEMENT FOR MOVEMENT INTO AND OUT OF ENGAGEMENT WITH SAID FIRST ELECTRICAL CONTACT; AND MANUALLY OPERABLE RESETTING MEANS MOUNTED ON SAID BASE INTERMEDIATE SAID BASE AND SNAP ACTING ELEMENT; SAID BASE PROVIDING A GUIDEWAY FOR RECEIVING SAID RESETTING MEANS FOR RECIPROCAL SLIDING MOVEMENT THEREIN BETWEEN A CONTACTS-CLOSED POSITION AND A CONTACTS-OPEN RESETTING POSITION, SAID RESETTING MEANS HAVING A PORTION FORMED OF ELECTRICALLY INSULATING MATERIAL; SAID RESETTING MEANS PORTION IN THE CONTACTS-OPEN RESETTING POSITION BEING DISPOSED INTERMEDIATE SAID STATIONARY AND MOVABLE CONTACTS PREVENTING INTERENGAGEMENT OF SAID CONTACTS; MEANS URGING SAID PORTION OF SAID RESETTING MEANS FOR MOVEMENT FROM THE CONTACTS CLOSED TO THE RESETTING POSITION; SAID RESETTING MEANS PORTION ABUTTING A SIDE OF SAID MOVABLE CONTACT WHEN THE LATTER IS IN THE CONTACTS CLOSED POSITION AND BEING INOPERATIVE TO MOVE THE RESETTING POSITION UNTIL AFTER SAID MOVABLE CONTACT MOVES OUT OF ENGAGEMENT WITH SAID STATIONARY CONTACT.