1. AN ELECTRICAL SWITCH COMPRISING A SWITCH HOUSING CONTAINING A MOVABLE PISTON MEMBER AND A PLURALITY OF PAIRS OF ELECTRICAL CONTACTS MEMBERS, EACH PAIRS OF ELECTRICAL CONTACT MEMBERS HAVING A CLOSED POSITION WHEREIN THEY ARE IN CONTACT AND AN OPEN POSITION WHEREIN THEY ARE OUT OF CONTACT, SAID ELECTRICAL CONTACT MEMBERS OF EACH PAIR POSITIONED IN RELATION TO EACH OTHER SO THAT DEFORMATION OF ONE MEMBER OF THE SAID CONTACT PAIR INTO A PERMANENT SET EFFECTS A CHANGE OF SAID PAIR FROM ONE OF SAID POSITIONS TO THE OTHER OF SAID POSITIONS, MEANS WITHIN SAID SWITCH HOUSING TO DRIVE SAID MOVABLE PISTON TOWARD SAID CONTACT MEMBERS, SAID PISTON MEMBERS POSITIONED SO THAT UPON MOVEMENT OF SAID PISTON MEMBERS SAID PISTON MEMBER CONTACTS AND DEFORMS INTO A PERMANENT SET ONE MEMBER OF EACH CONTACT PAIR AND THEREBY CAUSES THE PAIR OF CONTACT MEMBERS TO CHANGE FROM ONE OF SAID POSITIONS TO THE OTHER OF SAID POSITIONS.