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Device for monitoring relative point of impact of an object in flight proximal a reference line on a surface

  • US 4,814,986 A
  • Filed: 04/28/1987
  • Issued: 03/21/1989
  • Est. Priority Date: 04/28/1987
  • Status: Expired due to Fees
First Claim
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1. Device for monitoring the relative point of impact with a surface of an object in flight proximal a reference line on said surface, comprising:

  • means for forming one or more planes of radiated energy, said one or more planes being pre-positioned with respect to a reference line on a surface,means for detecting relative elevation of an object in flight at two successive points in time based on intersection of at least one plane of radiated energy by the object and for generating data representative of the relative elevation of the object at each point in time, andmeans for generating a signal indicative of whether the point of surface impact of the object is to one side of said reference line or the other based on the difference in said elevation.

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