Firearm sight with dialable range control
US3991500A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Aug 22, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G3/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A shoulder firearm is provided with a receiver-mounted collimating optical ight comprising a housing containing a hollow pivoted, reticle holder, an elongated rod of fluorescent material mounted in the forward end of the holder, an inclined first mirror which reflects light from a reticle at the rear end of the rod transversely to a half-reflecting second mirror, parallel to the first mirror, which, in turn, reflects the light back to the shooter's eye. A vertical range scale is mounted on the second mirror adjacent to the reticle image. To aim the firearm, the shooter aligns the reticle image with a distant target. The reticle is adjusted vertically for different ranges by means of a range knob mounted on the firearm near the trigger and connected by pinion and rack gears to the reticle holder, by rotating the range knob while observing the relative positions of the reticle image and range scale. The reticle includes a horizontal fiducial marker. The positions of the range scale and fiducial marker may be interchanged. The projectile may be an explosive one carrying a delay firing circuit for exploding the projectile in air over the target at a pre-selected range, in which case th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.