Optical sighting devices

Details Optical sighting devices Optical sighting devices

1977-08-15

1981-04-28

Martin, Jr., William D.

Geometrical instruments

Straight-line light ray type

Reticle

33245, 33277, 350 10, 356247, F41G 146

Patent

active

042637198

ABSTRACT:
An optical device for use as a gunsight, telescope or viewfinder is disclosed, the device being capable of indicating the distance of the target from the user. This is accomplished by a reticle in, or associated with, the sighting device, the reticle being calibrated to give the viewer an instant indication of range without requiring mechanical adjustments.

REFERENCES:
patent: 2275631 (1942-03-01), Johnson
patent: 3190003 (1965-06-01), O'Brien
patent: 3392450 (1968-07-01), Herter et al.
patent: 3766656 (1973-10-01), Westphal
patent: 3948587 (1976-04-01), Rubbert

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