Setback responsive arming device

Claim 1

AN ORDNANCE PROJECTILE SAFETY AND ARMING MECHANISM WHICH IS ADAPTED TO ARM ONLY IN RESPONSE TO A PREDETERMIMED ACCELERATION CHARACTERISTIC, SAID MECHANISM COMPRISNG; A PLATE POSITIONED PERPENDICUALRLY TO THE LONGITUDINAL AXIS OF THE PROJECTILE IN WHICH SAID MECHA NISM IS PLACED; FRAME MEMBERS VERTICALLY FIXED TO SAID PLATE; A FIRST SHAFT PARALLEL TO SAID PALTE AND JOURNALED IN SAID FRAME MEMBERS; A FIRST ROTOR FIXED TO SAID FIRST SHAFT, SAID FIRST ROTOR HAVING A CAM-LIKE MEMBER AFFIXED THERETO, SAID CAM-LIKE MEMBER BEING DISPLACED FROM THE CENTER OF ROTATION OF SAID FIRST ROTOR; A SECOND SHAFT PARALLEL TO SAID FIRST SHAFT AND JOURNALED IN SAID FRAME MEMBERS; A SECOND ROTOR FIXED TO SAID SECOND SHAFT, SAID SECOND ROTOR BEING SUBSTANTIALLY CYLINDRICAL AND HAVIN AN ARCUATE CUTAWAY PORTION INTO WHICH SAID CAM-LIKE MEMBER FITS TO LOCK SAID SECOND ROTOR AGAINST ROTATION; FIRST AND SECOND TORSION SPRINGS CONNECTED TO ONE END OF SAID FIRST AND SECOND SHAFTS RESPECTIVELY TO BIAS SAID SHAFTS IN A DIRECTION OPPOSITE TO THE DIRECTION OF ROTATION WHICH PROJECTILE ACCELERATION ACTS TO DRIVE SAID ROTORS; STOP MEANS CONTACTING SAID FIRST AND SECOND ROTORS TO PREVENT SPRING-BIASED ROTATION THEREOF; A SUBSTANTIALLY CYCLINDRICAL HUB FIXED TO THE END OF SAID SECOND SHAFT OPPOSITE ITS SPRING END, THE LONGITUDINAL AXIS OF SAID HUB BEING PARALLEL TO THE AXIS OF SAID SECOND SHAFT, ONE PORTION OF SAID HUB BEING CIRUCULAR AND THE REAMINING PORTION BEING FLAT; A THIRD SHAFT PARALLEL TO SAID FIRST AD SECOND SHAFTS AND JOURNALED IN ONE OF SAID FRAME MEMBERS, SAID THIRD SHAFT BEING ADAPTED TO ARM ASID PROJECTILE; A THIRD TORSION SPRNG CONNECTED TO SAID THIRD SHAFT TO BIAS SAID THIRD SHAFT IN THE SAME DIRECTION AS SAID FIRST AND SECOND SHAFTS; STOP MEANS CONTACTING SAID THIRD SHAFT TO BIAS SAID THRID SHAFT IN THE SAME DIRECTION AS SAID FIRST AND SECOND SHAFTS; STOP MEANS CONTACTING SAID THIRD SHAFT TO PREVENT SPRING-BIASED ROTATION THEREOF; A FLAT BLADE EXTENDING FROM THE END OF SAID SHAFT TO ENGAGE SAID CIRCULAR PORTION OF SAID HUB, SAID BLADE BEING SO CONSTRUCTED AND ARRANGED THAT IT CONTACTS SAID CIRCULAR PORTION OF SAID HUB LOCKING SAID THIRD SHAFT AGAINST ROTATION IN A DIRECTION OPPOSITE TO THE DIRECTION OF BIAS OF SAID THIRD SPRING; THE ACCELERATIVE FORCES PRODUCED BY PROJECTILE ACCELERATION CAUSING SAID FIRST ROTOR WITH SAID CAM-LIKE MEMBER TO ROTATE IN A DIRECTION AGAINST THE BIAS OF SAID FIRST SPRING UNTIL SAID SECOND ROTOR IS UNLOCKED, SAID SECOND ROTOR AND SECOND SPRING BEING SO CONSTRUCTED AND ARRANGED THAT SAID SECOND ROTOR REACHES A POSITION WHERE SAID ACCELERATIVE FORCES NO LONGER ACT TO CAUSE ROTATION THEREOF AT THE POINT WHERE PROJECTILE ACCELERATION BEGINS TO DECREASE RAPIDLY, THE MAMENTUM OF SID SECOND ROTOR THEREUPON ROTATING SAID SECOND ROTOR THROUGH AN ANGLE SUCH THAT SAID HUB PRESENTS SAID FLAT PORTION TO SAID BLADE UNLOCKING SAID THIRD SHAFT, THE ACCLELERATIVE FORCES PRESENT AT BLADE UNLOCKING THEN BEING SUFFICIENT TO ACT ON SAID BAR TO ROTATE SAID THRID SHAFT, THEREBY ARMING THE PROJECTILE.