1. A SELF-CLEANING MAGNETIC SWITCH INCLUDING A ROUND MOVABLE CONTACT BAR MADE OF PARA-MAGNETIC MATERIAL HELD IN ELECTRICAL CONTACT AT ONE END BY A MAGNETIC CONTACT THAT SERVES AS A FULCRUM FOR SAID ROUND BAR, AND ADJACENT OPPOSITE SIDES OF THE OTHER END OF SAID ROUND MOVABLE BAR, A MAGNETIC ABUTMENT AND A SECOND ABUTMENT, AT LEAST ONE OF SAID ABUTMENTS ALSO BEING AN ELECTRIC CONTACT, WHEREBY SAID ROUND BAR IS POSITIONED HAVING ONE END IN CONTACT WITH SAID MAGNETIC CONTACT AND THE OTHER END IN CONTACT WITH SAID MAGNETIC ABUTMENT, AND A PLUNGER POSITIONED ON THE SIDE OF SAID ROUND BAR WHICH IS ADJACENT SAID MAGNETIC ABUTMENT AT A POSITION INTERMEDIATE THE ENDS OF SAID ROUND BAR WHEREBY MOVEMENT OF SAID PLUNGER AGAINST SAID ROUND BAR THRUSTS SAID ROUND BAR AWAY FROM SAID MAGNETIC ABUTMENT WITH A SNAP ACTION AND AGAINST SAID SECOND ABUTMENT.