Electric switches and systems controlled thereby

Claim 1

AN ELECTRIC SWITCH COMPRISING A CAM CONTOURED TO PROVIDE A SHOULDER, A PLURALITY OF SWITCH ARMS INCLUDING A FIRST SWITCH ARM AND A SECOND SWITCH ARM AND A THIRD SWITCH ARM MOUNTED BETWEEN SAID FIRST AND SECOND SWITCH ARMS AND ADAPTED TO ALTERNATELY ENGAGE ONE OR THE OTHER OF SAID SWITCH ARMS, SAID THIRD SWITCH ARM NORMALLY CONTACTING SAID FIRST SWITCH ARM, A SYNCHRONOUS MOTOR INCLUDING DRIVING MEANS FOR DRIVING SAID CAM FOR A SELECTED PERIOD OF TIME, SAID FIRST SWITCH ARM BEING ARRANGED TO RIDE ON SAID CAM DURING SAID DRIVING PERIOD, SAID SHOULDER OF SAID CAM BEING OPERATIVE WHEN DRIVEN TO HOLD SAID THIRD SWITCH ARM OUT OF CONTACT TEMPORARILY WITH SAID FIRST SWITCH ARM AND IN CONTACT WITH SECOND SWITCH ARM, THERMAL ELEMENT MEANS INCLUDING A BIMETAL MEMBER HAVING A FIXED END AND A MOVABLE END AND MEANS CARRIED BY THE MOVABLE END OF SAID BIMETAL MEMBER TEMPORARILY CONNECTING SAID MOVABLE END WITH SAID CAM WHEN A PREDETERMINED TEMPERATURE IS REACHED, SAID THERMAL MEANS BEING OPERATIVE TO OVERRIDE SAID SYNCHRONOUS MOTOR DRIVE AND ROTATE