US2208576A - Gun sight - Google Patents

Description

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33-1254. me 2192039576 v5R @mi July 23, 1940. J, Q GARAND 2,208,576

GUN SIGHT Filed May 4, 1939 Fig 5- lTLvET-Ll'. my' Jahn. E.. Envnna 233', @rommelen msTRUMENTs.

Patented July 23, 1940 UNITED STATES Search PATENT OFFICE the Government of the United States of America, as represented by The Secretary of War and his successors in office Application May 4, 1939, Serial No. 271,729

5 Claims.

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

The subject of this invention is a gun sight.

The purpose of the invention is to provide a front sight in which the sighting member is offset with respect to the center line of its base so that it may be offset with respect to the center line of bore by the simple operation of reversing the base. The mounting of the base is arranged so that it may be conveniently applied and removed.

The specific nature of. the invention as well as other objects and advantages thereof will clearly appear from a description of a preferred embodiment as shown in the accompanying drawing in which:

Fig. 1 is a view in side elevation of the improved sight mounted on a gun barrel;

Fig. 2 is a View in front elevation of the sight;

Fig. 3 is a sectional view on the line 3-3 of Fig. 2.

Referring to the drawing by characters of reference there is shown a barrel 5 of a gas operated firearm in which the gas cylinder is mounted on the barrel by means of a band 'l which for the purpose of this illustration may be fixed to the barrel in any convenient manner, and retained in place by a member 8 threaded on the barrel.

The band conveniently forms a support for a front sight and to this end its upper portion is formed into a block 'Ia of. substantial thickness to provide a transversely disposed dovetail tongue 9 and a transversely disposed slot III. The tongue and slot receive a complemental groove Il and rib I2 on a front sight base I3. A pair of set screws I4-I4 threaded in the front and rear portions of the band engage the rib I 2 of the base and rmly hold it in place. In view of this there may be appreciable tolerance in the tongue 9 and groove II.

The rib I2 on the base is provided centrally with a through aperture I5 for threadedly receiving a vertically adjustable pin I6 inserted from the under side of. the base. The pin includes an upper end I1 which constitutes a sighting member of any suitable or desirable configuration and is disposed between curved arms I8I8 integral with the base and forming a shield or guard. The pin I6 is preferably offset with respect to the center line of the base and guard so that by the operation of reversing the base the sighting member I1 can be placed to the right or to the left of the center line of bore oi the barrel to apply a lateral deviation to the line of sight, for example to correct for drift. The lower end of the pin is located between the set screws I4 so that pressure of the screws on the rib serves to lock the pin in position of. vertical adjustment.

It will be noted in Fig. 2 that the front set screw I4 is on the center line of bore and that the lateral offset of the sighting member may be readily determined by reference to this set screw and the arms I8-I8 of the guard.

The sighting member Il may be readily adjusted vertically by merely loosening the set screws I4 and turning the member IB-I'I by acting on the part Il. However when it is desired to adjust the sighting member laterally it is necessary to remove the base I3, and reverse it from side to side, or merely loosen the set screws Ill-I4 and shift the base I3 sideways the desired amount. Then, re-tighten the set screws.

I claim:

1. In a gun sight, a support having a transversely disposed tongue and a parallel transversely disposed slot, a sight base having a groove to receive the tongue of the base and a rib fitting in the slot of the base, said rib and base having a vertical threaded aperture extending therethrough and laterally offset with respect to the center line of. the base, a pin threaded in the aperture and having an upper end disposed above the base to constitute a sighting member, a sighting member guard on the base, and a pair of aligned set screws threaded into apertures in the front and rear of the support and engaging the rib of the base to hold the same in its position of adjustment.

2. In a gun sight, a support having a slot, a sight base having a rib fitting in the slot, means carried by the support and `engaging the rib of the base to hold the base in place, and a vertically adjustable sighting member mounted in the rib between and in line with said holding means and held in position of vertical adjustment in the rib through action of said holding means on the rib.

3l. In a front sight for a gun, a support, a base mounted on the support for movement transversely thereof, a sighting member mounted in the base for movement vertically thereof, and means carried by the support for holding the base fixed in the support in position of transverse adjustment and acting through the base to hold the sighting member xed in the base in position of vertical adjustment.

4. In a gun sight, a support having a transw uw.

versely .disposed slot, a sight base having a rib slidably fitting in the slot and Whose center line represents the center line of bore of a gun barrel, a sighting member mounted in the base through the under side of. the rib and having a portion extending above the base, said member being laterally oiset with respect to the center line of the base, and means in the front and rear of the support engaging opposite sides of the rib to hold the base in its lateral position of adjustment on l0 the support.

JOHN C. GARAND.

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