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ANGULAR ACCELERATION SENSOR

  • US 3,768,374 A
  • Filed: 01/28/1972
  • Issued: 10/30/1973
  • Est. Priority Date: 03/02/1971
  • Status: Expired due to Term
First Claim
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1. An angular acceleration sensor for sensing movement of an object about a predetermined axis of rotation comprising:

  • a pair of valves each containing an inertia body positioned on opposite sides of said axis and located on a line extending perpendicularly to said axis, each of said inertia bodies being movable upon motion of said object to control fluid flow through said valves to derive fluid pressure signals therefrom representative of the motion of said object, said inertia bodies being arranged to effect, upon rotation of said object about said predetermined axis, pressure signals which are different from pressure signals occurring as a result of other types of motion of said object;

    fluid logic means receiving said fluid pressure signals from said valves and operable to distinguish pressure signals occurring as a result of rotation of said object about said predetermined axis from other pressure signals; and

    actuator means operated in response to the fluid pressure received from said logic means to effect control functions upon rotation of said object about said predetermined axis;

    said valves comprising a fluid pressure input source, a pair of conduit means for each of said valves, with the positions of said inertia bodies being operative to effect selective application of fluid pressure flow to said logic means through either one or the other of said pair of conduit means, and fluid pressure vent ports for venting said fluid pressure input to divert pressure flow from said conduit means, said inertia bodies being movable as a result of movement of said object to selectively close and open said vent ports to control application of fluid pressure flow to said fluid logic means.

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