US2250861A - Sight for firearms - Google Patents

Description

Ssamh Hmm 7a3-258m QR 212509861 SR July 29,1941. c. E. EKDAHL 2,250,861

` SIGHT FOR FIREARMS Filed oct. 2v, 1939 Uhh VILvn-lhviuufk l). w n

Patented July 29, 1941 UNITED STATES PATENT OFFICE SIGHT FOR FIREARMS Application October 27, 1939, Serial No. 301,623

5 Claims.

This invention relates to sights for firearms, and more particularly to adjustable mounts for such sights, whereby the sight may be adjusted both for elevation, to compensate for changes in range, and horizontally or laterally to compensate for windage, and it is contemplated by the invention to provide a mounting in which the movable parts may be fitted together accurately and smoothly, and at the same time be economical to manufacture.

Mountings for sights of a similar character have in the past been provided with dove-tail connections between the movable parts to guide them in their relative slidable adjustment. While this arrangement has been fairly satisfactory in some respects, it has required a somewhat expensive process of manufacture in order that such parts fit together accurately so that fine adjustments may be accurately made. In the present instance such a dove-tail connection between the movable elements of the sight mount has been eliminated, and provision made for an accurate slidable fitting together of the parts which may be manufactured more economically, and at the 4 be assured, and at the same time the parts may be relatively cheap to manufacture.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawing:

Fig. l is a top plan view of a sight mounting embodying my invention;

Fig. 2 is a sectional view on line 2 2 of Fig. l;

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

Fig. 4 is a sectional view on line 4 4 of Fig. 2; and

Fig. 5 is a sectional view on line 5-5 of Fig. 1.

To illustrate a preferred embodiment of my invention, I have shown a sight mount comprising a body member III by which the mounting may be secured to the receiver of the rearrn, which body member is provided with a shank II and a head I2, upon which head the sight mount proper is supported.

It will be noted that the shank I I, as shown in Fig. 1, is slightly twisted so that the head I2 will be in a true vertical position when the body portion I0 is secured in place. As shown by the cross-sectional view in Fig. 5, the inner surface of the body member is of concave shape, as at I3, to properly lit against the receiver, and is provided at its lower portion with a rib I4 designed to bear in a complementary shaped groove cut in the receiver, the whole being attached by means of a fastening member such as a screw or the like (not shown) passed through the opening I5.

As shown more particularly in Fig. 4, the head I2 is provided with a vertically extending groove I6, which groove is of modified V-shaped form in f that its side walls diverge outwardly, whereby the width of the groove is reduced adjacent the bottom thereof as compared with its mouth. At a point spaced from the groove the head I2 is provided with a rib I'I shown in this case adjacent the rear end of the head, which rib projects slightly beyond the inner surface of the body portion of the head and extends generally parallel to the groove I6.

To an intermediate portion of the head is secured a stud I8, which stud may be riveted in place, as shown at I9, and may be provided with a reduced threaded end portion 20 to receive the nut 2|, as plainly illustrated in Fig. 2.

The sight mount proper is an L-shaped member comprising a vertically extending arm 22 disposed adjacent the head I2, and a horizontally extending arm 23, which arm is disposed at the upper end of the part 22. The arm 22 is slotted, as shown at 24, and within this slot is snugly received the stud I8, previously described. This arm is also provided with a rib 25, shown more especially in Fig. 4, which rib is of modified V- shaped form so that it will t accurately within the groove I6. The rib, as Ishown in Fig. 4, projects from the rear surface of the arm 2`2, and when it is disposed in the groove IISthe body of the arm 22 is held in slightly spaced relation with respect to the head I2, the outer edge of the arm, however, bearing upon the rib I'I. The arm is held in this position by the nut 2| threaded upon the end 2U of the stud I8, and between the nut and the arm 22 is a spring 26, so that the friction between the arm and the head I2 may be adjusted.

Rotatably mounted in the upper end of the arm 22 is an adjusting screw 21 having a threaded portion 28 received in a threaded opening in the stud I8. This screw is held against longitudinal movement with respect to the arm 22 by a shoulder portion 29 and the turn button 3D non-rotatably secured at the upper end of the screw 2l.

This turn button at its lower portion may bear against a spring 3| which in turn bears against the upper portion of the vertical arm 22.

It will be obvious that with this construction when the adjusting member 30 is rotated the adjusting screw 21 will be moved relatively to the stud I8. As this stud is secured to the head I2, and as the screw 21 is prevented from longitudinal movement in the arm 22, the arm will be moved in a vertical direction with respect to the head so as to eifect a vertical adjustment of the sight mount.

If desirable, and as shown in Fig. 2 of the drawing, a click device may be provided between the turn button 30 and the spring 3|. This click device may consist of a series of serrations 32 on the lower surface of a sleeve 33 secured to the turn button, and a projection or boss 34 on the upper surface of the spring 3l, which is designed to engage in these serrations, the spring being secured against movement with respect to the arm 22.

It will be obvious that with this construction the arm 22 will be attached to the head I2 for accurate sliding adjustment in a vertical direction by means of the rib and groove 25 and IB, respectively, and the bearing of the outer edge of the arm upon the rib I1. Moreover, such a construction is much more economical to manufacture than the ordinary dove-tail construction, while giving more accurate and eiiicient results.

The sight member is shown at 35 having the peephole 36, and this member is carried upon a vertical arm 31 of a block or base member 38 duced lower end to receive the nut 42, which in turn bears against the spring 43 to adjust the frictional contact between the block 38 :and the upper surface of the arm 23. This arm is provided with an upwardly projecting rib 44 of modified V-shaped form, which rib fits snugly in a groove 45 of complementary shape formed in the block 38, the rib and groove extending longitudinally of the arm 23, and the groove being located adjaicent one edge of the block. Adjacent its other edge the block 38 is provided with a downwardly projecting rib 46, which rim bears againstthe upper surface of the arm 23, so that this block, like the arm 22, will have a two-line bearing upon the surface upon which it slides, and the main body of the block will be spaced from this surface between these lines.

Adjustment of the block 38 and the sight member 35 laterally is effected by an adjusting screw 41 having a threaded end 48 which is received in a threaded opening in the stud 40, this screw being rotatably mounted in the arm 23. The screw 41 is provided with a turn button 49, and is held against longitudinal movement in the arm 23 in the same manner as described in connection with the screw 21.

It will be obvious that I have arranged a sight mount wherein the sight may be adjusted both vertically and horizontally in an accurate and effective manner, and both adjustments are provided by substantially equivalent structure. At the same time the parts are so constructed that they may be manufactured economically, and Without the necessity of expensive and delicate operations. Moreover, the accurate tting of the movable parts against one another may be controlled by pressure upon the springs I8 and 43, so that the frictional contact of the movable parts may be adjusted whereby the ribs 25 and 44 may be maintained in a position accurately fitting the grooves I6 and 45 to insure the required sliding movement between these parts without the presence of any play or lost motion.

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and Variation within the spirit of the invention and within the scope of the appended claims.

What I claim is:

1. An adjustable sight mount for firearms comprising a mounting member, a sight-carrying member attached thereto for sliding adjustment, one of said members being provided with a groove extending in the direction of said adjustment and the other of said members having a rib received in said groove, said groove having side walls diverging outwardly from its bottom portion, said rib being complementally tapered to be received snugly against the side walls of the groove, one of said members being provided with an elongated slot parallel to said groove, a stud secured to the other member slidably tting said slot, securing means on the stud to hold said members slidably connected and said ribin said groove, and an adjusting screw rotatably mounted in said slotted member and extending within and along said slot to threadedly engage said stud whereby rotation of the screw eiiects slidable adjustment of said sight-carrying member. v

2. An adjustable sight mount for iirearms comprising a mounting member, a sight-carrying member disposed against said mounting member, a pair of spaced parallel ribs each of which is secured to a respective one of said members and bears against the other whereby said members are held in spaced relation between said ribs, means for securing said members together for relative slidable movement, and one of said members being provided with guide means cooperating with a rib on the other member to direct such movement in a linear path, said mounting member being provided with an elongated slot parallel to said ribs, an adjusting screw rotatably mounted in said mounting member and extending within and along said slot, and said securing means comprising a stud secured to the sight-carrying member and slidably fitting the slot to be threadedly engaged by said screw whereby rotation of the latter effects slidable adjustment of the sight-carrying member.

3. An adjustable sight mount for firearms comprising a mounting member, a sight-carrying member, a pair of spaced parallel ribs each of which is secured to a respective one of said members and bears against the other whereby said members are held in spaced relation between said ribs, one member being provided with guide means cooperating with a rib on the other member to direct such movement in a linear path, said guide means comprising a groove receiving a part of the rib therein, one of said members having a slot therein intermediate and parallel to said ribs :and the other member having a stud snugly and slidably received in said slot, a screw rotatably `carried by said slotted member and extending within and along the slot to be threadedly en- Search Room gaged with said stud, and means on the stud to resiliently urge said members in contact with each other and hold said one rib in said groove.

4. An adjustable sight mount for firearms comprising a body portion adapted to be secured to a part of the rearm, a supporting member adjustably secured to said body member for vertical sliding movement relatively thereto, means for guiding said supporting member in its movement relatively to the body member, said means comprising a groove in one of said members having outwardly diverging walls, a rib upon the other member having a complementally tapered outer edge to be received in said groove, one of said members being provided with a second rib bearing against the other member and disposed in spaced, parallel relation to said rst rib, and resilient means for holding said members in frictional contact, one of said members being provided With a slot parallel to said groove, and an adjusting screw extending within and along the slot and the other member having a stud extending into the slot to be threadedly engaged with the 'adjusting screw.

5. A sight mount for rearms comprising a body member adapted to be secured to the firearm, an L-shaped member adjustably secured to said mounting member for vertical movement with respect thereto, said L-shaped member having a horizontally extending arm, a block slidably mounted on said arm and carrying a gun sight, means for supporting said block on said arm and guiding it in its movements thereon comprising a groove in one of said members having outwardly diverging walls, a rib upon the other member having complementally tapered walls to be snugly received in said groove, a second rib on one of said members substantially parallel to the first and holding the surfaces of said members in spaced relation to each other between said ribs, one of said members being provided with a slot parallel to the groove, and an adjusting screw extending within and along the slot, the other of said members having a. stud extending into the slot and threadedly engaged with the adjusting screw, and means on the stud to hold said members slidably connected and said rib in said groove.

CARL E. EKDAHL.

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