Range-finding telescopic sight

Details Range-finding telescopic sight Range-finding telescopic sight

1981-05-04

1983-06-28

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

Multisight line

356 21, F41G 138, G01C 902

Patent

active

043897916

ABSTRACT:
A telescopic sight provides means for determining the range of a target of known size and for compensating for predetermined bullet drop over the target range. Reticles are fixed in both the front and rear focal planes of the sight, and first screw means, calibrated to indicate range, are provided for controllably rotating the erector tube to displace the image of the front reticle, formed in the rear focal plane, so as to bracket the target between the rear reticle cross-hairs and the image of the front reticle. Second screw means, also operable to rotate the erector tube, displace the target image so as to compensate for bullet drop.

REFERENCES:
patent: 3123915 (1964-03-01), Wilkinson
patent: 3340614 (1967-09-01), Leatherwood
patent: 3386330 (1968-06-01), Burris et al.
patent: 3431652 (1969-03-01), Leatherwood
patent: 3777404 (1973-12-01), Oreck

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