Front sight for projectile launchers
US4689910A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1986 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Mar 6, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G1/033
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Launchers of the type that are extensible when readied for use contain projectiles the efficiency of the propellants of which varies directly with their temperature. Prior to the extension of such launchers, they are water resistant and their interiors are thermally insulated and when extended, the rear and front sights become erected. The front sight, prior to launcher extension includes a sight housing in support of a sighting member having a central sighting post. One end of the sight housing is pivotally connected to the interior of the launcher housing and is under the influence of an erecting spring. The sight housing has a slideway extending to an opening through its free end and intersecting a lengthwise chamber in the sight housing. The slideway accommodates the sighting member and laterally of the chamber, the sighting member and the sight housing are interconnected in a manner enabling the sighting member to move lengthwise of the sight housing to a predetermined extent while preventing its lateral movement. A thermally responsive element within the chamber has one end connected to the sight housing below the chamber and its other end connected to the sighting member wit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.