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Range-finding telescopic sight

  • US 4,389,791 A
  • Filed: 05/04/1981
  • Issued: 06/28/1983
  • Est. Priority Date: 05/04/1981
  • Status: Expired due to Term
First Claim
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1. In a telescopic sight of the type comprising an objective lens set, an ocular lens set, an erector lens set disposed between said objective and ocular lens sets, a first reticle, fixed in the rear focal plane of the sight;

  • the improvement comprising in combination;

    (a) a second reticle fixed in the front focal plane of the sight;

    (b) means for controllably displacing the image of said second reticle formed in said rear focal plane operable to bracket a target of known size between said first reticle and said image of said second reticle, said displacing means further including means for indicating the range to said target; and

    (c) means integral with said displacing means for shifting the target image in said rear focal plane subsequent to determining the range to compensate for predetermined bullet drop over the range indicated by said displacing means.

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