US2493865A - Gun sight mount - Google Patents

Description

Jan. lb, 1950 2 Sheets-Sheet l luren/rn' Jan. 10, 1950 E. l.. FOSTER 2,493,865

GUN SIGHT MOUNT Filed Oct. l7, 1947 2 Sheets-Sheet 2 Afl IIIA

111 rel/tru J0 BY" 674m Patented Jan. 10, 1950 UNITED STATES yPATENT GFFICE GUN SIGHT MOUNT Emery L. Foster, Baytown, Mo.

Application October 17, 1947, Serial No. 780,431

3 Claims. 1

This invention relates to an improved mount for gun sights and more particularly to a mount adapted to be detachably disposed on a rie or other small firearms for adjustably supporting the rear sight or the rear end of a telescope sight relatively to the firearm barrel.

More particularly, the primary object of the present invention is to provide a rear sight mount which is so constructed that after initially zeroing in a firearm on which the mount is disposed ata plurality of ranges, said mount can belalniost instantaneously adjusted for accuratelyadjusting the sight to any one of the-rangeslto which the mount has been zeroed in thereby f'eliminating the need for employing guesswork in holding over or under a target at a range different from that at which the sights are set as is commonly required, especially in hunting.

A still further object of the invention is to provide a sight mount for use with telescopic sights whereby the entire sight may be adjusted relatively to the firearm barrel thereby eliminating the need for displacing the cross hairs of the sight either vertically or horizontally with respect to the axis thereof thus eliminating the distortion and inaccuracies which occur when the cross hairs of a telescope sight are moved away from the optical center of the lens.

Numerous other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings illustrating a preferred embodiment thereof, and wherein:

Figure 1 is a side elevational view showing the novel sight mount supported on a rifle or other firearm;

Figure 2 is a top plan view thereof;

Figures 3 and 4 are cross sectional views taken substantially along the planes as indicated by the lines 3 3 and 4 4, respectively, of Figure 1;

Figure 5 is an exploded perspective View of the sight mount, and

Figure 6 is an end elevational view of the upper portion of the sight mount and shown equipped with a peep sight.

Referring more specifically to the drawings, for the purpose of illustrating the preferred application and use of the sight mount, designated gendepending upon the size and shape of the barrel 8. Base I has screw fastenings I2 which extend transversely therethrough for engaging tapped recesses I4 of the receiver or barrel 8 to demountably secure the mount 1 thereto. The mount 'I may be mounted on either side of the receiver or barrel or the receiver tang, preferably as close to the eye of the rer as possible.

The base I0 is provided with an integral barrel portion I which projects from the outer side thereof and which communicates with the hollow interior I6, as best seen in Figure 4, of the base I0. The barrel I5 contains two rings I 'I and I8 which are rotatably disposed therein in side by side relationship and each of which is provided:

with a clamping screw I9 having an outwardly projected shank portion which extends through a circumferentially extending slot of the barrel I5 and so that the heads of the clamping screws I9 are disposed externally of the barrel I5 and spaced, longitudinally of the barrel, from one another. Thus itis readily apparent that the rings II and I8 may be rotated relatively to one another through an arc limited by the length of the slots 20 and may be secured within the barrel I5 in adjusted positions relatively to one another by tightening the clamping screws I9 thereof, the inner ends of which threadedly engage in the rings II and I8.

A drum or disc 2I is journaled in the rings II and I8 and is provided at its outer end with an actuating lever arm 22 having a handle portion 23 which is disposed outwardly of the barrel I5 and by means of which the drum or disc ZI can be rotated within said rings I 'I and I8 and the barrel I5. As best seen in Figure 4, the drum 2I is provided with longitudinally spaced radially extending bores 24 each of which contains an expansion coil spring 25 and a pin which is erally 'I and comprising the invention, a portion of a barrel and/or receiver 8 and forearm 9 of a rie or other firearm is illustrated.

The mount 1 includes a base I0 the inner face II of which is machined to fit flush against a portion of the barrel 8 and it will be readily obvious that the shape of the face II may vary urged outwardly thereby. Said pins 26 and 2l are disposed to align with indentations 28 of the rings I'I and I8, respectively, in certain posi# tions of the drum 2| relatively to said rings and for a purpose which will hereinafter become apparent.l The drum or disc 2I is provided at its inner end with an inwardly projecting eccen" trically disposed pin 29 which engages an opening v30 at the lower end of a link 3| and which is rotatably disposed therein. The link 3I extends upwardly through the recess I6 of the base I0 and through a slot 32 in the top wall of said base I0.

As best seen in Figure 1, the base III is provided adjacent each end thereof with a bore,34 which extends vertically therethrough and which is preferably but not necessarily non-circular in cross section. Each of the bores 34 reciprocally receives post 3-5, which posts are of the same cross sectional shape as the bores 34. The upper end of the posts 35 are secured to and support an elongated head 36 which is disposed above the top wall 33 of the base I0 and which, as best seen in Figure 5, is provided at one side edge thereof and intermediate of its ends with a notch 31 to accommodate the upper end of the link 3| which is pivotally connected to the head 36 by a pin 36. A set screw 39 extends threadedly through the head 36 and the lower end thereof is adapated to abut against the top wall 33l for limiting the movement of the head toward the top wall, and it will be readily apparent that the extent of downward movement of the head 36 may be' varied by adjustment of the set screw 39.

A pair of guide rods 40 is fixed to and projects from the opposite side edge of the head 36, said guide rods 40 extending transversely across the top of the barrel 8. A cross bar 4| is secured to the opposite ends of the rods 40 and has a feed screw 42 extending threadedly therethrough, the inner end of which extends and is journaled in a support 43 which slideably engages the guide rods 40. The feed screw 42 carries the clamping collars 44 which engage opposite sides of support 43 for retaining said feed screw in rotatable engagement therewith and whereby the sup ort may be adjusted longitlaiginally of the rod 4 and transversely of the barrel 8 by rotation of the feed screw. In the embodiment of the invention illustr ted in Figures 1 to 5, the support 43 is shown provided with an upstanding lug 45, which may be adjustable with respect thereto and which is adapted to receive a slotted base 46 of a clamp 41 which is detachably secured around the rear portion of the barrel of a telescope sight 48. The slotted base 46 is provided with upstanding ears 49 which are pivotally connected to the base portion of the clamp 41. A base 50 is suitably secured to the upper portion of the barrel 8, forwardly of the sight mount 1 and is provided with an upstanding stud for receiving the slotted base of an upstanding post 52 which is preferably connected swivelly at 53 to the base portion of a clamp 54 which detachably engages the forward part of the barrel of the sight 48.

Assuming that the mount 1 is assembled, as previously described and that the telescope sight 48 is mounted thereon, as illustrated in Figure 1, the firearm is first zeroed in at the shortest desired range, for example, 100 yards, by turning the lever 2| to cause the pin 29 to exert a push or pull on the link 3| for raising or lowering, respectively, the head 36 and the support 43 carried thereby., The set screw 39 is then turned until it engages the top wall 33 of the base I9 so that said head 36 can thereafter not be lowered below the minimum range. The lever 22 is then rotated clockwise, as seen in Figure 1 to elevate the support 43 until the firearm is zeroed in at an intermediate range, desired by the marksman. By loosening the clamping screw I9 of the ring I 1, said ring .can then be rotated until the recess 28 thereof is disposed to receive the pin 26 which will be projected into said recess by spring 25. The clamp screw I9 of the ring I1 is then tightened to xedly position said ring relatively to the barrel I5. The outer ends of the pins 26 and 21 are rounded so that when the lever 22 is thereafter turned clockwise to further elevate the support 43, the pin 26 will be cammed out of engagement with recess 28 of the ring I1 so that the sight mount 1 can be further elevated to zero in the telescope sight 48 of the firearm at a third, maximum range. The ring I8 is then turned until pin 21 engages in the recess 28 thereof and is then clamped relatively to the barrel I5 by tightening its clamp screw I9. It will thus be readily apparent that thereafter the mount 1 can be readily adjusted to any one of the three ranges very rapidly and accurately. For example, to set the firearm for firing at the shortest range the lever 2| is swung counter-clockwise as seen in Figure 1 to the extent of its movement or to adjust it to an intermediate range from its shortest range, said lever is turned clockwise until rotation thereof is impeded by engagement of the pin 26 with the indentation 28 of ring |1 which will be readily felt by the marksman. If it is desired to adjust the mount for the maximum range, lever 22 is forced beyond the intermediate position and turned clockwise until the pin 21 seats in the indentation 28 of the ring I8.

Windage adjustments can be accomplished by rotating the feed screw 42 in either direction depending upon whether it is desired to displace the support 43 to the left or right of the barrel 8.

It will be readily apparent, and as illustrated in Figure 6, that the mount 1 is likewise readily adaptable for supporting a peep or open sight. In Figure 6, the mount 1 is shown provided with a support 43 having a peep sight 55 projecting upwardly therefrom and preferably fixed thereto and which is adapted for use in conjunction with a conventional front sight of a rifle or other firearm. Obviously, in lieu of the peep sight an open'sight, not shown, could be provided and the adjustment of said peep sight 55 or open sight by actuation of the sight mount 1 will be the same as previously described with respect to the adjustment thereof for the telescope sight 48.

Likewise, it will be readily obviously that by providing additional rings |1 and I8 andadditional pins 26 or 21, that the mount 1 could be adapted for use at additional ranges.

Also by positioning the pin 29 on the other side of the verticalcenter of drum 2| the lever 22 when turned clockwise would adjust the sight toward a shorter range and when rotated counterclockwise would adjust the sight toward a longer range.

By having the lever 22 extending generally rearwardly from the drum 2|, said lever is disposed to be conveniently actuated by the thumb without removing the hand from the grip or the finger from the trigger of the firearm.

Various other modifications and changes are likewise contemplated and may be obviously resorted to, without departing from the spirit or scope of the invention as hereinafter dened by the appended claims.

I claim as my invention:

1. A gun sight mount comprising a base adapted to be detachably mounted against a side of a portion of a firearm barrel, a head disposed above said base and slidably connected thereto for movement toward and away from the base, guide means supported by said head and projecting laterally therefrom and adapted to be disposed transversely across the barrel, a sight supporting member mounted for sliding movement on said guide means transversely of the barrel, a drum or disc rotatably disposed in said base and adapted to be manually rotated relatively thereto, a link eccentrically connected to said drum or disc and pivotally connected to the head for raising and lowering the head, relatively to the base, when said drum or disc is revolved, said drum or disc being provided with spring pressed detent members slideably disposed for radial movement therein and projecting from the periphery thereof, said detent members being longitudinally spaced from one another, said base being provided with a barrel portion having a plurality of longitudinally spaced, circumferentially extending slots, a plurality of ring members rotatively disposed in said barrel portion and each provided with a clamp member extending through one of said slots and adjustable for clamping the ring thereof adjustably to the barrel portion, and each of said rings being provided with an inwardly opening indentation for receiving one of said detent elements releasably therein whereby said sight support may be adl justed accurately to various elevations by manually rotating said drum or disc for selectively positioning the detents thereof in said indentations.

2. A gun sight mount comprising a base adapted to be detachably mounted against a side of a portion of a rearm barrel, a head disposed above said base and slidably connected thereto for movement toward and away from the base, guide' means supported by said head and proj ecting laterally therefrom and adapted to be disposed transversely across the barrel, a sight supporting member mounted for sliding movement on said guide means transversely of the barrel, a drum or disc rotatably disposed in said base and adapted to be manually rotated relatively thereto, a link eccentrically connected to said drum or disc and pivotally connected to the heahdfgr raising and lowering the head, relatively to thnbase,

whe a' or disc is revolved, said drum or disc being provided with longitudinally spaced spring pressed detent elements projecting from the periphery thereof, said base including a barrel portion, a plurality of rings rotatably mounted in the barrel portion and in which the drum or disc is rotatably supported, each of said rings having an inwardly opening recess to releasably receive one of the detent elements in one position or rotation of the disc or drum, and means for adjustably clamping the rings individually to the drum for varying the circumferential spacing of the detent receiving recesses.

3. A gun sight mount comprising a base adapted to be detachably mounted against a side of a portion of a firearm barrel, a head disposed above said base and slidably connected thereto for movement toward and away from the base, guide means supported by said head and projecting laterally therefrom and adapted to be disposed transversely across the barrel, a sight supporting member mounted for sliding movement on said guide means transversely of the barrel, a drum or disc rotatably disposed in said base and adapted to be manually rotated relatively thereto, a link eccentrically connected to said drum or disc and pivotally connected to the head for raising and lowering the head, relatively to the base, when said drum or disc is revolved, said drum or disc being provided with longitudinally spaced spring pressed detent elements projecting from the periphery thereof, and said base being provided with adjustably disposed means for releasably receiving said detent elements when the drum or disc is revolved and whereby said head may be quickly and accurately adjusted to various elevations above the base.

EMERY L. FOSTER.

REFERENCES CITED The following references are of record in the le of this |patent:

UNITED STATES PATENTS Number Name Date 656,867 Tolman Aug. 28, 1900 1,330,002 Price Feb. 3, 1920 1,970,623 Redfield Aug. 21, 1934 2,052,562 Goudeau Sept. 1, 1936 FOREIGN PATENTS Number Country Date 101,181 Australia 1937 212,530 Great Britain 1924

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