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Bi-directional motion sensing and clocking system

  • US 4,041,285 A
  • Filed: 04/12/1976
  • Issued: 08/09/1977
  • Est. Priority Date: 04/12/1976
  • Status: Expired due to Term
First Claim
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1. An electrical bi-directional motion sensing and clocking system for identifying the relative sense and magnitude of movement experienced by a moving body, said system comprising:

  • a sensor mounting means,target means mounted for relative motion with respect to said sensor mounting means in a direction and in a magnitude corresponding to the relative direction and magnitude of movements experienced by said moving body,a first sensor mounted on said sensor mounting means in proximity to the path of said target means and producing a first input signal in response to the passage of said target means thereby,a second sensor also mounted on said sensor mounting means in proximity to the path of said target means and producing a second input signal in response to the passage of said target means thereby,said first and second sensors being located relative to one another such that said first and second input signals each occur once in a first sequence for a predetermined increment of movement in a first direction by said moving body and once in a second reverse sequence for a predetermined increment of movement by the body in a second direction opposite to said first direction,first recording means connected to said first sensor for recording the occurrence of said first input signal,second recording means connected to said second sensor for recording the occurrence of said second input signal,output gate means connected to said first and second recording means for producing a clock output signal upon the recorded occurrence of both said first and second input signals,clearing means connected to said first and second recording means and to said output gate means for clearing the recorded contents of the first and second recording means upon the production of said clock output signal thereby preparing for similar processing of the next succeeding pair of first and second input signals, andsequence recording means connected to detect whether the first input signal or the second input signal last occurred just prior to the production of said clock output signal and to provide a respectively corresponding sequence output signal representing the input signal sequence and hence direction of body movement to be associated with the increment of body movement represented by said clock output signal.

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