Patent ID: 8413582
Filing Date: 2013-04-09
Classification: B33Y,F42C

Abstract:
1. A mechanical safing and arming mechanism, comprising: (a) a frame having a rotatable gear and star wheel, (b) a shaft configured to move along a substantially linear path relative to the frame and carrying an arming cell wherein the shaft comprises a plurality of teeth that engage the rotatable gear, (c) a rocking verge pivotably connected to the frame and configured to undergo oscillation relative to the shaft and the frame which inhibits the free rotation of the starwheel and rotatable gear to a series of discontinuous steps that have a rate dictated by an oscillation rate of the verge; (d) a first latch responsive to a event for releasably hindering at least a certain motion of the shaft relative to the frame; (e) a second latch responsive to a second event which is different from the first event for releasably hindering at least a certain motion of the shaft relative to the frame; wherein as a result of a trigger event comprising both the first and second events, the first and second latches are released and the mechanism moves the arming cell from a safe location to an armed location by the motion of the shaft relative to the frame wherein the timing of the movement of the shaft relative to the frame from the safe location to the armed location is controlled by the motion of the verge and the star wheel.