Electrical fuses for projectile or the like

Claim 1

AN ELECTRICAL FUSE FOR A PROJECTILE COMPRISING; A PIEZO-ELECTRICAL CELL OPERABLE UPON THE APPLICATION OF PRESSURE THERETO TO DEVELOP AN IGNITION VOLTAGE FOR IGNITING THE CHARGE IN A PROJECTILE IN WHICH THE FUSE IS MOUNTED, A HAMMER ELEMENT IN THE FUSE MOVEABLE TO DEVELOP PRESSURE ON SAID CELL BY IMPACT THEREON, A FIRST SPRING BIASING SAID HAMMER ELEMENT TOWARD SAID CELL, A TRIGGER ARM HAVING ONE END ENGAGING SAID HAMMER ELEMENT AND NORMALLY HOLDING THE HAMMER ELEMENT IN INEFFECTIVE POSITION, AN INERTIA BODY CONNECTED TO THE OTHER END OF SAID TRIGGER ARM, SAID INERTIA BODY BEING MOVEABLE IN ONE DIRECTION TO MOVE SAID TRIGGER ARM INTO INEFFECTIVE POSITION OUT OF ENGAGEMENT WITH SAID HAMMER ELEMENT THEREBY TO RELEASE SAID HAMMER ELEMENT TO CAUSE PRESSURE TO BE DEVELOPED ON SAID CELL THEREBY, A SECOND SPRING URGING SAID INERTIA BODY IN THE OTHER DIRECTION, AND INERTIA FORCES ACTING ON SAID INERTIA BODY WHEN THE PROJECTILE IS ACCELERATED DURING THE FIRING PHASE THEREOF URGING THE SAID INERTIA BODY IN THE SAID ONE DIRECTION.