Improvements in or relating to the triggering off of a predetermined action on an accelerated carrier such as a rocket projectile

摘要

1,090,400. Inertia switches. CONTRAVES A.G. Sept. 29, 1966 [Oct. 15, 1965], No. 41890/66. Heading H2B. [Also in Divisions F2 and F3] A device for actuating an electrical switch 5 in a rocket when the rocket has covered a predetermined flight path from the launching point comprises an inertia-operated nut 2 which, under the influence of acceleration, is movable along a screw-threaded spindle 10 towards the electrical switch, the nut having mounted therein planet rollers 21 and 22, 23, Fig. 2 (not shown), which roll freely on the screw thread of the spindle and whose axes of rotation A 1 , (A 2 ) and (A 3 ) obliquely correspond to the helical pitch angle of the screw thread. At the end of the displacement path Eo of the nut the leading end face of the nut makes impact on an abutment pin 60 and an actuator pin 50 of the electrical switch and when continuing its rotation pushes the abutment pin rearwardly against an opposing spring 6 until the head of the pin is driven by the spring into a recess 26 in the end face of the nut to lock the nut against further rotation and keep the switch 5 actuated. The nut is secured against rotation in its initial position by a security pin 40 engaging in a recess 24 in the rear face of the nut, until, under the influence of effective acceleration forces of predetermined minimum magnitude and duration on a movable inertial body 4 connected with the security pin, the latter is moved out of the securing position against the opposing force of a spring 42, and the damping effect of a plunger 41 which moves in a guide cylinder to expel air through a narrow vent 45. Upon return movement of the plunger a wider air inlet 44 is automatically opened.