US3292264A

US3292264A - Telescope sight mounting

Info

Publication number: US3292264A
Application number: US454869A
Authority: US
Inventors: Leo T Kincannon
Original assignee: Individual
Current assignee: Individual
Priority date: 1965-05-11
Filing date: 1965-05-11
Publication date: 1966-12-20
Anticipated expiration: 1983-12-20

Description

d., m$ NN N Y a R my e /o OnNU 2 J1 u r l N m NNN @N mm .m sw V ww@ NP, m@ nw ww N W m pml/ IW E., f Oi m mw \,c M L d N W L @Nah/sv m.. @Hrm 04N mm N y u m u w K E M P d T w m L W n m L m M n, x 6 L N mi m w NHY N 2 n w M P p VN ww mw 565m wm United States This invention relates to telescope sight mountings for rearms.

An object of the invention is to provide improved means for detachably mounting on a rifle a telescope sight of the long-eye-relief type.

Another object is to provide a mounting including a track-forming base member on which the telescope sight can be easily and rmly applied in longitudinally adjusted position.

Still another object is to provide novel fastening means for detachably securing the track-forming base member to the rifle in a position forward of the receiver.

A further object is to provide a telescope sight mounting which is of simple and reliable construction and capable of inexpensive manufacture.

The invention further consists in the several features hereinafter described and claimed.

In the accompanying drawing,

FIG. l is a right-hand side elevational view of a rifle equipped with a telescope sight mounting of the invention, a rearwardly adjusted position of the telescope sight being indicated in broken lines;

FIG. 2 is a detail side elevational view of the mounting on an enlarged scale;

FIG. 3 is a top view of the mounting, the telescope being indicated in broken lines;

FIG. 4 is a bottom plan view of a track-forming base bar of the mounting;

FIG. 5 is a transverse sectional elevational view taken generally on the line 5-5 of FIG. 2;

FIG. 6 is an enlarged transverse sectional view taken generally on the line 6-6 of FIG. 2;

FIG. 7 is an enlarged fragmentary sectional view taken generally on the line 7-7 of FIG. 3;

FIG. 8 is a top plan view of a clamp collar for the base bar;

FIG. 9 is a transverse sectional elevational view, similar to FIG. 5, showing a modified form of telescope sight mounting, and

FIG. 10 is a detail end view, partly in section, of a modified form of barrel-embracing collar.

In the drawing, the numeral designates a rie of conventional type, and the numeral 16 designates a telescope sight which is mounted on the rifle as hereinafter described. The rie includes a barrel 17 secured to a stock 18 and having a receiver 19 at its rear end. The usual horizontal dovetail slot or groove 20 is formed transversely in the upper rear portion of the rifle barrel at a region forward of the receiver. The rie is equipped with the customary front and rear

metallic sights

21 and 22, the front sight being secured to the front end of the barrel and the rear sight being secured to the receiver. The rifle is here shown to include a tubular magazine 23 extending below the barrel in close parallel relation thereto, the front end portion of the magazine being attached to the barrel by a vertically elongated clamping loop member 24. A somewhat similar clamping loop member 25 secures the rifle barrel to the fore-end of the stock.

atet

ice

By way of example, the rifle is here shown to Ibe of the lever-action type.

An elongated track-forming lbase bar 26, which is fabricated from fiat bar stock, extends longitudinally above the rifle barrel forward of the receiver and is rigidly secured to the barrel in slightly spaced parallel relation thereto, as hereinafter described. The base bar is of trapezoidal cross-section with parallel top and bottom faces and beveled side edges, as seen in FIGS. 5 and 6, to form parallel dovetail ways 27, the wide horizontal face of the bar being at the top.

The rear end portion of the base bar has rigidly secured thereto a downwardly projecting attaching member 28 with a cylindrical vertical shank 29 which is riveted in a vertical bore 30 formed in the bar centrally of the width of the bar and which has integrally formed at its lower end a frusto-conical dovetail tenon 31. The tenon 31 has a detachable slidable t in the horizontal dovetail groove or slot 20 formed in the rifle barrel. A vertical set screw 32 with a socketed wrench-receiving upper end is threaded coaxially in the attaching member 28, as best seen in FIG. 7, and is engageable with the Hoor of the dovetail groove 20 to lock the frusto-conical tenon 31 in laterally adjusted position in the groove. The attaching member 28 can be inexpensively formed as a screw machine part.

The front end portion of the track-forming base bar 26 has rigidly secured thereto a downwardly projecting attaching member 33 which includes a cylindrical vertical shank 34, FIG. 6, snugly fitting in a vertical bore 35 of the base bar and tightly secured to the bar as by a nut 36 threaded on the shank and engaging the upper face of the bar. The projecting lower portion of the front attaching member 33 is in the form of a transversely extending at plate or bar 37 the opposite ends of which have downwardly projecting arcuate gripping flanges 38 with inner coaxial dovetail grooves 39 of arcuate shape, FIGS. 4 and 6. A clamping ring or collar 40 with a convexly rounded outer surface and a top gap or opening 41 snugly encircles the rifle barrel 17 forward of the front end of the stock and is exteriorly grooved at its open upper end to form laterally spaced tenons 42, FIGS. 6 and 8, having coaxial convexly formed segmental rustoconical gripping surfaces 43 engageable in the complementary dovetail grooves 39 of the attaching member 33. As seen in FIG. 6, the lower portion of the clamping collar 40 is thinned to increase the resiliency of the collar and also to clear the tubular magazine. A vertical set screw 44 with a socketed wrench-receiving upper end is threaded coaxially in the attaching member 33, as seen in FIG. 6, and passes through the collar opening 41 into engagement with the upper surface of the rifle barrel to lock the attaching member firmly to the barrel collar 40. The front attaching member 33 and the barrel collar 40 can be inexpensively formed as screw machine parts.

A vertical set screw 45 with a socketed wrench-receiving upper end is threaded through the track-forming base bar about midway of the length of the bar and is engageble with the upper surface of the rifle barrel to brace the assembled base bar and also to effect a slight bowing of the base bar when this is desired.

To mount the track-forming base bar 26 on the rifle, the front attaching member 33 `is first engaged with the dovetail tenons 42 of the rie barrel collar 40, the bar being placed at an angle to the barrel for this purpose, as indicated by broken lines in FIG. 3, to enter the tenons into engagement with the arcuate dovetail grooves 39' of the attaching member 33. The base bar is then swiveled rearwardly on its joint with the barrel collar 40 to the position over and parallel to the barrel, the bar clearing the upper end of the clamping loop member 25, and the frusto-conical tenon 31 of the rear attaching member 28 entering the transverse dovetail groove 2() in the rifle barrel to a position vertically above the barrel axis. The set

screws

32, 44 and 45 are then tightened into engagement with the barrel.

The mounted base bar 26 forms a support for the telescope sight 16 which is of the low-power long-eyerelief type, such as with `a power in the range of 1 to 3. By way of example, a telescope of this type may be of 1.3 power. The telescope sight is here shown to include a cylindrical tube 46 secured to a bracket or fitting 47. The laterally spaced lower side portions of the bracket are slightly resilient in a transverse direction and are provided with parallel, laterally spaced inwardly facing dovetail Vgrooves 48, FIG. 5, in which are engaged the opposite dovetail ways 27 of the track-forming base bar 26, the bracket being slidably entered onto the base bar from the rear end of the bar. rPhe telescope 'assembly is slidably `adjusted along the base bar through a considerable range of travel, for example several inches, to suit the vision characteristics of the user, and is clamped in adjusted position by transversely extending clamping screws 49 on the bracket. In the present instance, the telescope bracket is also provided with means including convention-al adjusting

devices

50 and 51 for effecting sighting adjustments. The position of the telescope forward of the receiver 19 avoids interference with the conventional metallic sighting means on .the receiver and also avoids interference with ejection of spent cartridges in the case of certain types of rifles.

To remove the telescope sight from the rifle the clamping screws 49 on the telescope bracket are slightly loosened and the telescope is slid rearwardly off the base bar 26. The base bar may remain attached to the rifle without interfering with sighting by means of the conventional front and

rear sights

21 and 22 when lthis type of sighting is desired, the line of sight passing over the base bar.

The modied form of telescope sight mounting shown in FIG. 9 is adapted for accommodating a conventional type of telescope 16 without sighting adjustments. In this modified mounting, the telescope is secured to an inverted U-shaped bracket 57, which has an enlarged circular bight 58 snugly embracing the telscope tube and a pair of parallel vertical legs 59 with respective dovetail notches 60 in which are seated the opposite dovetail ways 27 of a track-forming base bar 26', the bracket legs being slightly resilient and being connected by one or more transverse clamping screws 49, as in FIGS. 2 and 5, to clamp the bracket in slidably :adjusted position on the base bar 26. The base bar 26 and its attachment to the rifle barrel may be identical with that of FIG. 2, but is here shown to have a different front end attachment in which a looped clamping member 61 with `a contracted waist 62 snugly embraces both the riie barrel and the subjacent tubular magazine and has a top boss 63 to which the front end of the base bar is secured by a snugly fitting pivot-forming vertical screw 64. The looped clamping member -61 is fixed to the rie by a transverse clamping screw 65' connecting the contracted waist portions of the clamping member and passing between the barrel and the magazine. In the case of a rie without the tubular magazine the lower portion of the clamping loop member may be omitted. In some instances, the telescope may be carried on a pair of the brackets 57 disposed in axially spaced relation. The telescope 16 is suitably sighted as by laterally adjusting the frusto-conical rear tenon 31, FIGS. 2 and 3, in the 4 dovetail groove 20 of the rifle barrel and by screwing down the intermediate set screw 45, FIGS. 2 and 3, to effect a slight bowing of the track bar.

The modified form of barrel-embracing loop member or collar 70 shown in FIG. 10 is split at the bottom and clamped to the rifle barrel by a transverse screw 71 below the barrel. The upper portion of the collar has arcuate segmental dovetail grooves 43, as in FIGS. 6 and 8, to form tenon portions 42 for swiveled interengagement with the arcuate grooved gripping iianges 3S, FIG. 6, of the front attaching member 33 of the track-forming base bar. The upper portion of the collar also has a central opening 72 to admit the clamping screw 44, FIG. 6, of the front lattaching member of the base bar.

I claim:

1. A telescope sight mounting for `a rie having a barrel with -a receiver and a transverse dovetail top groove forward of the receiver, comprising a track-forming base bar extending longitudinally above the rie barrel forward of the receiver, front and rear fastening means rigidly and detachably securing said base bar to the riiie barrel, said front fastening means having a detachable verticalaaxis swivel connection with the barrel to permit turning of the base bar thereon to a position in substantial alignment with the barrel, and said rear fastening means including a dovetail tenon engageable in said dovetail barrel groove and releasably clamped therein, said track-forming base bar being adapted to interengageably support a telescope sight thereon forward of the receiver in longitudinally adjusted clamped position.

2. A telescope sight mounting for a rifle having a bar rel with a receiver, comprising a track-forming base bar extending longitudinally above the barrel forward of the receiver, and front and rear fastening means lrigidly and detachably securing said base bar to the riiie barrel, said front fastening means including a barrel-embracing member and a fastening member on the base bar having a swiveling vertical-axis frusto-conical dovetail connection with the upper portion of the barrel-embracing member, said front fastening means further including a clamping set screw coaxially threaded in said fastening member, said track-forming base bar being adapted to interengageably support a telescope sight thereon forward of the receiver in longitudinally adjusted clamped position.

3. A telescope sight mounting for a riiie having a barrel with a receiver at its rear portion, a track-forming base bar extending longitudinally above the rifle barrel forward of the receiver, a front and rear fastening means for the base bar detachably secured to said barrel, said front fastening means including a barrel-embracing member having laterally spaced opposed arcuate dovetail grooves at its yupper portion, said front fastening means further including a fastening member rigidly attached to said base bar at the lower side thereof and having lateral- -ly spaced depending projections with opposed arcuate dovetail grooves interengageable with the dovetail grooves of the barrelembracing member to form a vertical-axis swiveling connection between the base bar and the barrelembracing member, -said base bar when disposed transversely of the rifle barrel permitting engagement and release of the base bar projections with respect to the dovetail grooves of the barrel-embracing member. 4. A telescope sight mounting for a rie having a barrel 'with a transverse dovetail top groove forward of the receiver, comprising a track-forming base bar extending longitudinally above the barrel forward of the receiver and having a vertical bore in its rear portion, and front and rear fastening means rigidly and detachably securing said base bar to the barrel, said front fastening means having a detachable vertical-axis swivel connection with the barrel to permit swinging of the base bar thereon to a position in substantial alignment with the barrel, said rear fastening means including a fastening member with a frustoaconical tenon below the base bar and with a re` duced upper coaxial shank tightly secured in said base bar bore, said rear fastening means further including a clamping set screw threaded Coaxially in said fastening member, said tenon being engageable in said dovetail barrel groove and clarnpable therein by said set screw, said track-forming base bar being adapted to interengageably support a telescope sight thereon forward of the receiver in longitudinally adjusted clamped. position.

1,323,151 11/1919 Burton 42-1 ll/l951 6 Belding 33-50 Lowe 33-47 Pike 42-1 Fischer et al. 33--50 Weaver 42-1 Felix 42-1 BENJAMIN A, BORCHELT, Primmy Examiner.

Claims

1. A TELESCOPE SIGHT MOUNTING FOR A RIFLE HAVING A BARREL WITH A RECEIVER AND A TRANSVERSE DOVETAIL TOP GROOVE FORWARD OF THE RECEIVER, COMPRISING A TRACK-FORMING BASE BAR EXTENDING LONGITUDINALLY ABOVE THE RIFLE BARREL FORWARD OF THE RECEIVER, FRONT AND REAR FASTENING MEANS RIGIDLY AND DETACHABLY SECURING SAID BASE BAR TO THE RIFLE BARREL, SAID FRONT FASTENING MEANS HAVING A DETACHABLE VERTICAL-AXIS SWIVEL CONNECTION WITH THE BARREL TO PERMIT TURNING OF THE BASE BAR THEREON TO A POSITION IN SUBSTANTIAL ALIGNMENT WITH THE BARREL, AND SAID REAR FASTENING MEANS INCLUDING A DOVETAIL TENSON ENGAGEABLE IN SAID DOVETAIL BARREL GROOVE AND RELEASABLY CLAMPED THEREIN, SAID TRACK-FORMING BASE BAR BEING ADAPTED TO INTERENGAGEABLY SUPPORT A TELESCOPE SIGHT THEREON FORWARD OF THE RECEIVER IN LONGITUDINALLY ADJUSTED CLAMPED POSITION.