1. AN EXPLOSION OPERATED ELECTRICAL SWITCH COMPRISING A HOLLOW ELONGATED CONTAINER CONSTRUCTED OF DUCTILE METAL, AN EXPLOSIVE CHARGE DISPOSED WITHIN SAID CONTAINER, AN ELECTRICAL INSULATING MEDIUM DISPOSED ON THE EXTERIOR OF SAID CONTAINER, A FIRST ELECTRICAL CONTACT ELEMENT INCLUDING A FLANGE ENCOMPASSING SAID CONTAINER AND DISPOSED ON SAID INSULATING MEDIUM, A SECOND ELECTRICAL CONTACT ELEMENT DISPOSED ADJACENT SAID FIRST ELECTRICAL CONTACT ELEMENT AND IN CONTACT ESTABLISHING RELATIONSHIP WITH THE FLANGE THEREOF, AND A FLEXIBLE ELECTRICAL INSULATING MEDIUM DISPOSED BETWEEN SAID FIRST AND SECOND ELECTRICAL CONTACT ELEMENTS, SAID SECOND ELECTRICAL CONTACT ELEMENT HAVING A SHARP EDGE ADJACENT SAID FLANGE FOR PIERCING SAID FLEXIBLE INSULATING MEDIUM TO ESTABLISH CONTACT WITH SAID FIRST ELECTRICAL ELEMENT.