Geometrical instruments – Straight-line light ray type – Multisight line
Reexamination Certificate
1998-06-26
2001-05-15
Carone, Michael J. (Department: 3641)
Geometrical instruments
Straight-line light ray type
Multisight line
C042S107000
Reexamination Certificate
active
06230414
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a rear sight which is mounted on a firearm transverse to the gun-target line and can be moved in a preferably dovetailed slot transverse to the gun-target line.
BACKGROUND OF THE INVENTION
A sight of this type, which has proven itself, is known from AT 379 447 B, which is herewith introduced into this application by reference.
Various problems have arisen when the user wanted to adjust the sight in the open; thereby the spring laid in additionally, which holds the rear sight in place, was lost due to carelessness. A further particular, not always viewed as advantageous, was that the force necessary to displace the sight changed along the path of displacement. Moreover, its manufacture was relatively expensive due to construction of plastic with a metallic insert on the underside.
Another type of sight is known from DE 34 16 696 A. It is transversely displaceable in a horizontal slot by screws disposed horizontally and transversely to the direction of travel, and vertically displaceable by a vertical adjustment screw projecting with its head into a groove of the sight whereby play related to tolerances is eliminated by springs. This construction requires several threads, screws, and springs and is accordingly expensive in construction, care, and maintenance.
BRIEF SUMMARY OF THE INVENTION
The invention aims to avoid the disadvantages of the prior-art sights and to provide a sight which is simple in construction, easy to adjust, and cost effective to manufacture.
According to the invention it is intended to provide a sight of the type stated above with a recess having an essentially T-shaped cross section by which the middle area of the lower part of the sight, which sits in the slot of the firearm, is formed to act as a spring.
The T-shaped recess therein consists, in essence, of a groove-like longitudinal indentation, running in the direction of the slot and perpendicular to the direction of travel, proceeding from the base of the sight, and of an opening, running parallel to the axis of the slot and parallel to the axis of travel and cutting through the sight from its front wall up to its rear wall. Preferably its extent, in the direction of the axis of the slot, essentially coincides with the length of the longitudinal recess in the base which, for its part, opens into the upper opening recess.
Through these two recesses, a one-piece sight is obtained which in its side regions is a solid piece from the upper part down into the lower lying guide part, but in its central section makes possible a transverse movement of the guide part with respect to the upper part through the horizontal opening whereby an elastic inward compression of the residual guide areas is made a possible by the vertical recess in the base.
These guide regions acting as springs are, according to a particular embodiment of the invention, easily formed to project outwardly, wherein these projections lie in the range of a few tenths of a millimeter, for example, 0.2 mm.
According to the invention the material from which the sight is manufactured can be metal and, in the case of steel, for example, can be manufactured by metal-cutting processing whereby it is possible, in particular for the horizontal opening, to choose manufacture by means of electrical discharge machining.
It is also possible to use metal suitable for injection molding and to make the openings and recesses with cores, which is preferable due to cost-effective manufacture.
Finally, it is of course also possible to use plastic capable of injection molding, and thereby to form the openings and recesses by cores as well.
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Buckley Denise J
Carone Michael J.
Kilpatrick & Stockton LLP
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