Adjustable sight for firearms
US4388772A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1981 |
| Grant date | Jun 21, 1983 |
| Priority date | — |
| Expiry date | Jan 12, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G1/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An adjustable sight for firearms of the type having a trapezoidally shaped dovetail extending transversely across the upper rear end of the firearm and a sighting bead projecting upwardly at the front of the slide. The adjustable sight includes a trapezoidally shaped base which replaces trapezoidally shaped, fixed sights normally mounted in the dovetail. The base is frictionally secured to the slide by a set screw extending through a threaded bore in the base which is torqued against the lower wall of the dovetail. A transverse slot formed in the base receives a sight blade having formed therein a notch projecting downwardly from its upper edge. The blade is held in place by a blade set screw mounted in a second threaded bore in the base. The set screw intersects the slot at an acute angle, and its end is sufficiently pointed so that its lower surface contacts the lower edge of an aperture formed in the blade. The aperture is positioned at the side of the notch, which causes the notch to rotate downwardly as the set screw imparts a rotational moment to the blade about the aperture, thereby forcing the lower edge of the blade against the bottom of the slot. The aperture is elliptica…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.