Firearms – Muzzle making – attaching or repair
Patent
1992-03-09
1993-10-19
Bentley, Stephen C.
Firearms
Muzzle making, attaching or repair
362110, F41G 135
Patent
active
052534430
DESCRIPTION:
BRIEF SUMMARY
The present invention relates, in general terms, to a laser-beam aiming appliance intended to be fastened to a firearm in order to make it easier to aim it at a target. It is concerned particularly with an improved mode of construction and especially a device for axial positioning of the laser generator.
A laser-beam aiming or sighting appliance takes the form of an elongate housing, in which are accommodated a laser generator, an electrical-energy source for supplying the laser generator, and an axial-positioning device for adjusting the axial position of the laser generator on the inside of the housing, in order to orient the axis of the laser beam in such a way that, at a predetermined distance from the firearm to which the aiming appliance is fastened, the axis of the laser beam coincides with the axis of the barrel of the firearm.
In the known laser-beam aiming or sighting appliances, the axial positioning of the laser generator is carried out by means of adjusting screws. An alternative embodiment is described in U.S. Pat. No. 2,715,275 relating to a sighting telescope. The axial alignment of this appliance is obtained by means of two radial plungers arranged in two planes perpendicular to one another, the first plunger being displaceable longitudinally in order to ensure adjustment in elevation, and the second plunger being displaceable longitudinally in order to ensure adjustment in azimuth or drift. The displacement of each plunger is controlled by means of a ring. With such a device, however, the adjustment in elevation and in azimuth is limited to a displacement corresponding to one revolution of the corresponding ring, that is to say to 360.degree..
Now it has been found that, although a laser-beam aiming or sighting appliance makes sighting easier, especially when the gunner is working under poor lighting conditions, the laser beam reproduces the least tremor of the firearm. Moreover, an adjustment of the laser beam is practicable only for a precisely determined distance because the laser beam has a perfectly straight path, whereas the projectile has a curved path. The adjustment of the beam as a function of the distance of the target is therefore an especially difficult problem which calls for a very high fineness of adjustment.
The object of the present invention is to afford a solution to this problem by providing an aiming or sighting appliance equipped with an arrangement capable of ensuring an adjustment of the direction of the laser beam with a fineness and accuracy higher than those which the known devices allow.
There is provided, according to the invention, a laser-beam aiming or sighting appliance, in which the laser generator is mounted on the inside of a sleeve, in such a way that the gun of the laser generator is held by three bearing members arranged in angular positions spaced from one another, a first bearing member being arranged in a radial position located in a vertical axial plane, whilst a second bearing member is arranged in a radial position located in a horizontal axial plane.
Each of the first and second bearing members consists of a slide having a bearing face which extends in a plane oblique relative to the axial plane perpendicular to the radial direction of the bearing member under consideration, the oblique face of each slide co-operating with a rib provided on the outer surface of the gun of the laser generator. The face of the slide which is opposite the bearing face having a thread, meshes in a thread formed in the inner surface of a ring, in such a way that the rotation of the ring causes the displacement of the slide parallel to the axis of the sleeve, whilst the abovementioned oblique bearing face displaces the axis of the gun of the laser generator parallel to the radial direction under consideration.
In an exemplary embodiment, each of the slides passes through an orifice formed in the sleeve, and each slide is coupled to a separate ring which extends coaxially relative to the sleeve. The rib which co-operates with the oblique face of each slide extends o
REFERENCES:
patent: 4916713 (1990-04-01), Gerber
patent: 5033219 (1991-07-01), Johnson et al.
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