Object Size Or Distance Known Patents (Class 356/21)
  • Patent number: 3948587
    Abstract: Disclosed are telescopic gunsights for aiding shooters to achieve proper "hold-over" when shooting at targets of estimatable heights at long ranges. The reticles in the preferred telescopic gunsights comprise two or more superjacent target-spanning and aiming apertures of differing heights. By comparing the height of a target image viewed through the sight to the height of one or more of the apertures, the shooter can determine the aiming sight picture which produces the hold-over necessary to strike the target. Using the preferred variable power scopes of this invention the shooter can rapidly make adjustments so that the scope will be "calibrated" for any one of a plurality of target heights and/or trajectories, and for trajectory variations caused by altitude and ambient temperature variations and for angles of fire differing substantially from horizontal.
    Type: Grant
    Filed: January 28, 1974
    Date of Patent: April 6, 1976
    Inventor: Paul E. Rubbert