Range-finding telescopic sight

G - Physics – 02 – B

Patent

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88/17

G02B 23/00 (2006.01) G01C 3/04 (2006.01) G01C 3/22 (2006.01) G02B 23/14 (2006.01)

Patent

CA 1163843

ABSTRACT OF THE DISCLOSURE A telescopic sight provides means for deter- mining 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.

401944

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