JPS58127097A - Regulator for convergence for sport gun - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the convergence of a sporting gun barrel to a line of sight or a line parallel thereto. Therefore, in the case of a single-barreled gun with a ventilator strap on top, the axis of the ventilator strap is a straight line parallel to the line of sight, and the device according to the invention is capable of adjusting the convergence of the barrel axis with respect to the axis of said strap. Make adjustments.

In the case of a double gun, this axis of one barrel is parallel to the line of sight, and the device according to the invention is provided in the other barrel (preferably generally the lower barrel).

Numerous devices are known for modifying the barrel convergence of double-barreled guns. Most of the above devices consist of a special insert interposed between the barrels, which causes the barrels to be curved only slightly (for example, see Belgian Patent No. 837,789). With this type of device, experience has shown that it is not possible to change the geometrical convergence of the two barrels, and thus the target shooting height of the lower barrel, without impairing the straightness of the upper barrel. Now, for example, a person practicing traps is eager for the lower barrel to hit the point aimed at, whatever the desired intersection of the bundles of bullets fired successively by the upper and lower barrels.

Another solution that has already been proposed relies on devices with replaceable and directional tube chokes.

The tubes are associated with the muzzle of the gun barrel, where they are each maintained by threaded rings. The tubes are designed such that their conical inner part (forming the so-called choke) makes an angle to the axis of the outer cylindrical surface which rests on the barrel or barrels of the gun. Thus, any rotation of the tube relative to the associated barrel corresponds to the direction of the axis of the conical portion relative to the axis of the barrel.

Although such a device allows the desired modification of the target firing height of the corresponding gun barrel, this advantage has the adverse effect of inhibiting changes in the deviation adjustment of the bundle of bullets reaching the target.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a simple and convenient snow making system that adjusts convergence without interfering with deviation adjustment.

For this purpose, the device according to the invention comprises a tube for extending at least one barrel of the gun, which is integrated with the barrel by means of a fastening device and which is connected to the axis of the bore of the associated barrel. It is of the type that allows adjustment of the direction of the axis of the bore. The fixing device is also characterized in that the axis of the bore of the tube always lies in a plane containing the axis of the gun barrel and the center of the sight of the gun so equipped.

The present invention will now be described in more detail by way of example with reference to the drawings.

In Figures 1 and 2, the gun has upper and lower barrels (1).
and (2). Muzzle (3) at the muzzle of the gun barrel (2)
is brazed so that the gun barrel (1) can freely pass through its upper part.

Said muzzle (3) has a cylindrical journal (4), the axis of which is at right angles to that of the barrel (2). journal(
4) is traversed by a threaded diameter passage into which one end of the tube choke (5) is screwed.

Each muzzle (3) has two set screws (6), (
and their inner ends respectively engage the bearing surfaces of two lands (8), f9) provided on the journal (4).

These figures clearly show how the convergence can be easily adjusted by tightening and loosening the screw (6) (force screw).

To point out the various features of the above device: tube choke (
5) The axis of the barrel (1) and (2) is always on the plane containing the axes of the barrel (1) and (2), thus eliminating any correction of deviations when adjusting the convergence; Shorter by a length approximately equal to the length of the choke;
The internal rear part of the tube choke (5) has a 0 [ Due to the fact that the barrel (1), which is supported as shown in the figure, can slide freely inside the muzzle (3), the lower barrel, which is generally more used, is supported by any bimetallic material while the temperature rises. - This tube (5) is a very inexpensive component and also prevents the choke from opening or closing when worn or by the user, for example. easily replaced when desired.

As shown in Figure 3, the device according to the invention may also be installed in a single barrel gun. In that case, the muzzle (3) is the barrel (1
) is integrated with the ventilation strap supporting the sight star α4. Otherwise, the apparatus is similar to that described with respect to FIGS. 1 and 2, and operates in exactly the same way.

This single barrel embodiment is of particular interest given the regulations for clay pigeon shooting guns. The above regulations allow only one shot at a target (eg USA).

It will be clear that many modifications can be made to the embodiments described above without departing from the scope of the invention. For example, the set screw may be replaced in other positions than already shown and by equivalent means.

[Brief explanation of the drawing]

1 and 2 are partial cross-sectional views of the end of the barrel of an upper and lower double gun, and the lower barrel is equipped with the device of the present invention. FIG. 3 shows the application of the device to a single barrel gun. (1) is the upper barrel, (2) is the lower barrel, (3) is the muzzle, (4) is the journal, (5) is the tube, (6),
(Force is a push screw, (81, +9) is a land, (11)
is a ventilation belt, and the one below is a sight star.

Claims (1)

[Claims] 1. It has at least one barrel and one sight, and has at least one tube for extending the barrel, which is integrated with the barrel by a fixing device, A convergence adjustment device for sporting guns in which a fixing device is capable of adjusting the direction of the axis of the bore of the tube with respect to the axis 1c of the associated barrel, said fixing device always including the axis of said barrel and the center of said sight A convergence adjustment device for a sporting gun characterized by being located on a flat surface. 2. The convergence device for a sporting gun as set forth in claim 1, wherein the fixing device comprises a muzzle fixed to the barrel on which it is to be mounted, and the muzzle has an axis perpendicular to the axis of the barrel. 1. A convergence adjustment device for a sporting gun, characterized in that it has a cylindrical journal with a cylindrical diameter, said journal being traversed by a diametrical passage into which one end of a tube is secured by axial threading action. 3. In the convergence adjustment device for a sporting gun as set forth in claim 2, the muzzle is provided with two adjusting screws, the heads of which can be touched from the outside, and the opposite ends of the muzzles provided with two adjusting screws. Convergenx for a sports gun, characterized in that it engages with a pressing surface provided in advance on
Iil 91 device. 4. The convergence adjustment device for a sporting gun as set forth in claim 2 is equipped with a single barrel equipped with a ventilated strap, and the muzzle is integrated with the ventilated strap. Features Convergence i for sports guns! 1! l adjustment device. 5. The convergence adjustment device for a sporting gun as set forth in claim 2 is equipped on an earthwork double gun, and is attached to the end of the lower barrel of the gun, and the muzzle is integrated with the upper barrel. Features a convergence adjustment device for sporting guns. 6. The convergence adjustment device for a sporting gun according to claim 5, characterized in that the length of the lower barrel is shorter than the length of the upper barrel, and the difference between these lengths is equal to the length of the tube. Convergence adjustment device for sports guns.