US2187096A

US2187096A - Adjustable sight for firearms

Info

Publication number: US2187096A
Application number: US296897A
Authority: US
Inventors: Edward S Pomeroy
Original assignee: Smith and Wesson Corp
Current assignee: Smith and Wesson Brands Inc
Priority date: 1939-09-28
Filing date: 1939-09-28
Publication date: 1940-01-16
Anticipated expiration: 1957-01-16

Description

33-257 GR 2918799096 5R Jan. 16, 1940. E 5 POMEROY 2,187,096

ADJUSTABLE SIGHT FOR FIREARMS Filed sein. 2s, 19:59

i@ jf ff? 1l F .if A 4 {I UILUWICIULJHL INQIHUIWCIMCM Patented Jan. 16, 1940 UNITED STATES PATENT OFFICE ADJUSTABLE SIGHT FOR FIREARMS Edward S. Pomeroy, Springfield, Mass., assigner to Smith and Wesson, Inc., Springfield, Mass.,

a corporation of Massachusetts Application September 28, 1939, Serial No. 296,897

6 Claims.

This invention relates to sights of the type having a vertical adjustment for elevation and a horizontal adjustment for windage. While the improved sights may be applied to rearms of various kinds, they are particularly intended for use on small firearms such as revolvers and pistols.

The principal objects of the invention are toprovide a sight which is simple and inexpensive to construct, which is compact and unobtrusive, which may be adjusted quickly and easily, which does not get out of adjustment in response to shocks such as the shock of ring, which is efficient and durable in use and which is generally superior to prior sights of the type referred to.

For the purpose of illustration a typical embodiment of the invention is shown in the accompanying drawing in which:

Fig. 1 is a side elevation of a portion of a revolver with the improved sight applied thereto;

Fig. 2 is a top plan view of the sight and a portion of the revolver;

Fig. 3 is a section on line 3--3 of Fig. 1;

Fig. 4 is a section on line 4-4 of Fig. 2;

Fig. 5 is a section on line 5 5 of Fig. 3;

Fig. 6 is a section on line 6-6 of Fig. ll;

Fig. 7 is a top plan of a portion of the revolver with the sight removed; and

Fig. 8 is a section on line 8-8 of Fig. '7.

The particular embodiment of the invention chosen for the purpose of illustration is shown in position on a revolver comprising a frame I, a barrel 2, a hammer 3, and a revolving charnber il. Extending lengthwise of the revolver along the top of the frame is a groove 5 which terminates at the rear end in the plane of the vertical shoulders 6 (Figs. 1, 2, 7 and 8). EX- tending forwardly from the plane of the shoulders 3, in the bottom of the groove 5, is a deeper groove I having an undercut portion 9 extending throughout the full length of the groove and flaring side portions 8 extending throughout only a portion of the length of the groove.

The mount for the sight comprises a rear portion whose width is approximately equal to that of the revolver treme I (Fig. 2) and an elongated forward portion including a spring leaf l2 which ts into the groove 5. The shoulders at the junction between the forward and rearward portions seat against the shoulders 6 (Figs. l and 2). The mount |||2 of the sight is held in position by means of the screw I3 near the forward end of the groove 5.

The adjustable sight comprises a lower cylindrical portion Ill and an upper at portion |5 containing the sight notch |6, the lower portion being confined to the central portion of the frame and the upper portion I5 projecting symmetrically on opposite sides of the central portion, As shown in Fig. 3 the frame is provided with a cylindrical recess I8 to receive the cylindrical portion I4 of the sight, the recess I8 extending into the frame from the right-hand side and terminating at the shoulder I9 (Fig. 3). Above the recess I8 is a transverse slot extending the full width of the mount to receive the at upper portion of the sight.

Extending through the cylindrical portion I4 is a screw 2| comprising two heads 22 and 23, one integral with one end of the screw and the other in the form of a nut on the other end of the screw and seating in a recess in the left-hand side of the frame. The head 22 is somewhat larger than the recess I8 and the right-hand side of the frame is provided with a larger circular recess 24 t0 accommodate the larger head, the shoulder between the recesses I8 and 24 serving to restrain endwise movement of the screw 2|. Both heads 22 and 23 are provided with slots to permit rotation of the screw by means of a screw driver or the like, the nut 23 being fast to the screw so that rotation of the nut produces rotation of the screw.

As shown in Figs. 1 and 5 the recess 24 is provided with three pairs of opposite chisel-shaped recesses 3| to receive the detents 32 mounted at the opposite ends of a diametrical bore through the screw head 22 with a compression spring 33 therebetween yieldingly to urge the detents into opposite recesses 3|. Thus the screw remains in any one of the adjusted positions in which the detents extend into a pair of recesses. By reference to Fig. 3 it will be evident that rotation of the screw 2| shifts the sight transversely of the rearm, thereby providing a windage adjustment.

Immediately in front of the sight I5 the narrower portion of the frame I2 is provided with a vertical opening or socket to receive the internally-threaded screw head H the upper end of the opening being enlarged to accommodate the larger upper end 42 of the head. The outer periphery of the lower smaller portion of the head is provided with an annular recess to accommodate the split ring 43 to retain the head in the aforesaid opening. The screw 44 which threads into the head 4| has an elongated head l5 tting into the aforesaid undercut portion 9 at the bottom of the recess l, thereby preventing rotation of the screw when the head l2 is turned. As shown in Figs. 2 and 6 the upper end of the head 112 is provided with a slot 46 by which the nut may be rotated, and as indicated in Figs. 2, 4 and 6 the head l2 has a diametrical opening il to accommodate a spring and a pair of detents, like spring 33 and the detents 32, which fit into recesses 48 corresponding to the recesses 3|. When the head 42 is rotated in the direction to thread it off the screw 44 the rear end Qi the frame |||2 is lifted by engagement of the split ring 43 with the under side of the frame, the head 45 of the screw pressing downwardly against the bottom of its groove and the elongate forward portion I2 of the frame flexing upwardly. As shown in Figs. 4 and 5 the head 45 of the screw 44 is preferably beveled to accommodate this flexing movement.

From the foregoing it will be evident that the rear end of the sight frame may be flexed upwardly by adjustment of the head 42 and the sight I5 may be shifted horizontally by adjustment of the screw ZI, thereby affording adjustment for both elevation and windage. Incidentally the screw driver slots in the heads 22 and 42 serve to indicate at a glance, by their angular positions in relation to the grooves 3| and 48, how the sight is adjusted at any time, the slots being parallel with the diametrical detent openings through the heads. To remove the sight from the gun it is necessary merely to remove the screw I3. To remove the transversely adjustable parts it isnecessary merely to remove the nut 23 from the screw 2|. After the as-sembly has been removed from the gun the screw 44 may be threaded out of the head 42, and the head may then be removed from the frame I2 by snapping out the spring 43.

The location of the detents in the heads of the adjusting screws affords a compact design, which is particularly advantageous in small arms. And the provision of two detents pressed in opposite directions avoids the danger of accidental displacement of the detents by shock, such as the shock of firing, because any shock which tends to retract one detent from its recess tends to force the other detent more tightly into its recess.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

I claim:

1. A device of the character referred to comprising a sight, a mount, and means for adjusting the sight including a screw having a circular head rotatably fixed in a circular socket in the mount, the periphery of the socket having a recess disposed in a plane perpendicular to the axis of the screw and the head having an axial opening disposed in the same plane, and a spring-pressed detent disposed in said opening for engagement with said recess, whereby the sight may be held in any one of a plurality of adjusted positions by the detent snapping into said recess.

2. A device of the character referred to comprising a sight, a mount, a screw for adjusting the sight, the screw having a circular head rotatably fitted in a circular socket in the mount, the periphery of the socket having a circumferential row of pairs of opposed recesses disposed in a plane perpendicular to the axis of the screw and the head having a diametrical opening disposed in the same plane, detents in opposite ends of said opening for simultaneous engagement with a pair of opposed recesses, and a compression spring in the opening between the detents for urging the detents outwardly into the recesses, whereby the sight may be held in any one of a plurality of adjusted positions by the detents snapping into a 0 pair of said recesses.

3. A device of the character referred to comprising a sight, a mount, and means for adjusting the sight transversely for windage, characterized in that said means includes ar screw having threaded engagement with said sight and having a circular head rotatably xed in a circular socket in the mount, the periphery of the socket having a recess disposed in a plane perpendicular to the axis of the screw and the head having an axial opening disposed in the same plane, and a springpressed detent disposed in said opening for engagernent with said recess, whereby the sight may be held in any one of a plurality of adjusted positions by the detent snapping into said recess.

4. A device of the character referred to comprising a sight, means for movably mounting the sight on a firearm including amount having a vertical socket, a screw head rotatably mounted in said socket, a vertical screw having one end threaded into said head and the other end seating on the firearm, means for restraining rotation of the screw when the head is rotated, means for restraining axial movement of said head relatively to the mount, the periphery of said socket having a recess disposed in a plane perpendicular to the axis of the screw and the head having an axial opening disposed in the same plane, and a springpressed detent disposed in said opening for engagement with said recess, whereby the sight may be held in any one of a plurality of elevated positions by the detent snapping into said recess. 5. A device of the character referred to comprising a sight means for movably mounting the sight on a rearm including a mount having a vertical socket, a screw head rotatably mounted in said socket, a vertical screw having one end threaded into said head and the other end anchored on the firearm, means for restraining rotation of the screw when the head is rotated, means for restraining axial movement of said head relatively to the mount, the periphery of said socket having a circumferential row of recesses disposed in a plane perpendicular to the axis of the screw and the head having an axial opening disposed in the same plane, and a springpressed detent disposed in said opening for engagement with said recesses, whereby the sight may be held in any one of a plurality of elevated positions by the detent snapping into said recesses.

6. A device of the character referred to comprising a sight, means for movably mounting the sight on a firearm including a mount having a vertical socket, a screw head rotatably mounted in said socket, a vertical screw having one end threaded into said head and the other end seating on the firearm, means for restraining rotation of the screw when the head is rotated, means for restraining axial movement of said head relatively to the mount, the periphery of said socket having a circumferential row of pairs of opposed recesses disposed in a plane perpendicular to the axis of the screw and the head having a diametrical opening disposed in the same plane, detents in opposite ends of said opening for simultaneous engagement with a pair of opposed recesses, and

a compression spring in the opening between the detents for urging the detents outwardly into the recesses, whereby the sight maybe held in any one of a plurality of elevated positions by the detents snapping into a pair of said recesses.

EDWARD S. POMEROY.