4. AN OMNI-DIRECTIONAL INERTIAL SWITCH COMPRISING IN COMBINATION: (A) AN ELONGATED TUBULAR HOUSING, (B) SUPPORT MEMBERS MOUNTED IN EACH LONGITUDINAL END OF SAID HOUSING, (C) FIRST AND SECOND ELECTRICAL CONTACT ASSEMBLIES INCLUDING SPRING LOADED CONTACTS IN THE LONGITUDINAL DIRECTION, (D) RESILIENT MEANS MOUNTING SAID FIRST AND SECOND ELECTRICAL CONTACT ASSEMBLIES ON A FIRST AND A SECOND SUPPORT MEMBERS RESPECTIVELY, (E) STOP MEANS MOUNTED INSIDE SAID TUBULAR HOUSING FOR ALIGNING SAID ASSEMBLIES UNDER A PREDETERMINED TENSION ALONG THE LONGITUDINAL AXIS OF SAID HOUSING AND FOR PREVENTING LONGITUDINAL AND TRANVERSE MOVEMENT OF SAID ASSEMBLIES EXCEPT IN OPPOSITE DIRECTIONS AND AGAINST THE TENSION FORCE WHEN A PREDETERMINED ACCELERATION FORCE IS APPLIED