US1715203A

US1715203A - Rear sight for firearms

Info

Publication number: US1715203A
Application number: US472951A
Authority: US
Inventors: Crawford C Loomis
Original assignee: Remington Arms Co LLC
Current assignee: Remington Arms Co LLC
Priority date: 1921-05-27
Filing date: 1921-05-27
Publication date: 1929-05-28
Anticipated expiration: 1946-05-28

Description

OQ 'l 97159203 BBQ-254.,

May 28, 1929.l c. c. Loomis REAR SIGHT FOR FIREARMS Filed May 27, 1921 Alill/[Ill] V I NVENQR. v 'CRAWFORD C Looms K Arm evene-issie.

Patented May 28, 1929.

CRAWFORD C'. IiOOIVlIS7 0F ILION, NEW YORK, ASSIGNOR TO REMINGTON ARMS COM- PANY, INC., A CORPORATION OF DELAWARE.

REAR SIGHT FOR FIREARMS.

Application filed May 27,

This invention contemplates improvements in rear sights for firearms and has for an object the provision of a sturdy, rigid, vertically adjustable sight which though easily adjustable does not readily get out of adjustment or repair and is relatively cheap to manufacture.

A further object of the present invention is to provide a sight leaf for short ranges and a sight leaf for longer ranges, together with a mounting means rendering one of the sight leaves inoperative when the other is being used.

It is a still further object of the invention to provide visible range scales associated with each of the above-mentioned sight leaves, together with a construction which indicates to the gun operator the proper range scale to be read with each sight leaf.

Other objects relate to the details of construction and combinations thereof, which are described in the specification and illustrated in the attached drawings.

In the drawings:

Fig. 1 is a view in side elevation of a gun sight constructed after my invention, adjusted for use wit-li short ranges.

Fig. 2 is a view of the gun sight as seen from above in the direction of arrows 2-2 of Fig. 1.

Fig. 3 is a view in side elevation of the gun sight of the present invention adjusted for use with longer ranges.

Fig. t is a view in transverse section of the gun sight taken along the line 4f-4: of Fig. 1.

In said drawings, the numeral 11 indicates the sight body proper, provided preferably with an integral dovetail tenon 12 receivable in a corresponding mortise in the barrel or receiver of the gun, the bottom face 13 be ing substantially parallel with the axis of the barrel. The top face 14 of the body is inclined to the bottom face, as shown, and is provided with upstanding side flanges 15 formed with guide grooves 16 preferably parallel to the face 14.-. These grooves receive and serve as guide ways for the edges 17 of the sight carrier 18 which may be in the form of a plate as shown which is therefore slidable in a direction oblique to the barrel axis. These grooves may be either straight or curved so that the sight carrier is movable in a straight line or along a curve. At one end, preferably the high end,

1921. serial No. 472,951.

of the carrier 18 sight leaves carrying sight surfaces are provided, the construction of which will be more fully described hereinafter. It will be obvious that the elevation of the sight surface above the axis may be increased by sliding the sight plate rearwardly and decreased by sliding the plate forwardly, whereby adjustment for various ranges may be quickly and accurately made.

The angle of inclination of the guide grooves 16 with the barrel axis may vary greatly for guns of different power. In the form illustrated the angle has been so selected as to give a change of elevation of one fifth of the sliding movement of the sight plate. In this way it is possible to adjust the sight with very great accuracy without resorting to excessively line graduations. This reduces the possibility of error in use and reduces the time required for adjustment.

Means is provided for retaining the sight plate in its various positions of adjustment. This may take the form of a transversely movable latch bolt 25 having a locking detent 26 engageable with properly positioned notches in the side of the sight plate 18. The latch bolt is spring tensioned toward locking position by the spring 27 bearing against a shoulder formed by the head 28 which for assembling purposes is preferably threaded onto the bolt 25 as shown at 29. The head 28 normally extends slightly beyond the edge of the base so that it may be readily pressed inward to permit of sight adjustment.

In order to prevent accidental loss of the sight plate it is preferred to provide a screw 30 carried by the plate and having its end 31 extending into a. groove 32 in the top face of the sight base. This will allow full freedom of motion of the plate but will positively prevent accidental removal of the plate from the base. If it should be desired to remove the plate, this can be easily donc by backing up the screw 30 for a few turns.

It is to be noted that the sight leaf 19 is located at the extreme end of the sight carrier 18 and at the high end of the plate. This is a matter of considerable import-ance as in this way the sight surface may be quite low without interference by the base at its lowest position. If placed near the middle or the lower end of the plate it would be necessary to make the sight leaf 19 con- CFI made higher also these disadvantages would be further enhanced.

Such a sight can be very easily changed from an aperture sight to an open sight and vice versa by the substitution of one type of sight plate for the other. It is well recogniZed that for best results an aperture sight must be placed within 8l from the eye of the shooter, while an open sight must be placed at least double this distance. It may be desired to provide means whereby both such sights may be carried by and used with a single gun. Such a means may be effected, for example, by the provision of an aperture sight on the receiver bridge of the gun and an open sight further forward, as upon the rear portion of the barrel. With both of these sights mounted on the same gun, in order that one may not interfere with the use of the other, provision may be made for reversing one sight carrier onjits base where it will hold its sight leaf below the line of sight and out of the way. It will be readily seen that the construction of the present invention is exceedingly well adapted for this use of two different sights on a single gun. Manipulation of screw 30 affords detachment and a placing in reversed position of carrier 18 in the guide.

Locking means may be provided for positively securing the sight base to the gun, such as a screw 33, the head portion of which lies beneath the lower face of sight carrier 18. The screw passes through the sight body 11 and bears against that portion of the gun which engages the bottom face of the sight body.

It is obvious that the extent of ranges covered by a single sight leaf is necessarily limited. The present invention contemplates a construction whereby a more extensive series of ranges may be secured without increasing the length of the base or sight carrier. According to the present invention two

sight leaves

19 and 19 are provided, being preferably formed integral and substantially at right angles to each other. At different heights above the mounting and gun axis, a lower range aperture 20 is formed in sight leaf 19 and an upper range aperture 40 is formed in sight leaf 19. Pivot pin 43 secures the sight leaves and sight carrier in hinged engagement. The frictional resistance between the walls of the sight carrier and the edges of the sight plate serves to hold the sights in their adjusted positions, but special means for this purpose may be provided. As seen in Figs. 2 and 3, the sight carrier plate is cut away to receive the sight leaf 19 when the sight leaf 19,

with its lower range aperture 20, is adjusted to its elevated position for use with the lower ranges.

It will be seen in Fig. 2 that a lower range scale graduated from 50 to 650 yards is provided at one side of the carrier 18, and an upper range scale graduated from 700 to 1000 yards is provided at the other side of the carrier. When aperture 20 is adjusted to its effective position and sight carrier 18 is slidably moved upward to its extreme posit-ion the alignment of the mark 22 with the graduation on the scale will indicate the maximum range when aperture 20 is used, namely G50 yards in the form shown. By rotating the sight leaf through an angle of 900 and slidably moving the sight carrier down and to its extreme low position as shown in Fig. 8, the sight surface 410 will be positioned for the next range adjustment, namely 700 yards as indicated by mark 22". By slidably moving the sight carrier upward the range may be increased to 1000 yards in the form shown. Adjustment is therefore available for ranges from point blank to 1000 yards.

The numerals of the lower range scale may be stamped on the sight leaf carrying the higher range aperture 40, as shown in Fig. 2. Obviously when the higher range is used these numerals will disappear and the user will be forced to use the proper (upper) range scale. This therefore serves as an indicator to indicate the proper range to use for the different positions of the sight leaf and avoids the risk of reading the wrong scale.

lVhat I claim as new and desire to secure by Letters Patent of the United States is 1. In a sight for firearms, a base formed with means for attaching it to a firearm and provided with side plates having inclined guide means, a sight carrier consisting of a plate having lateral edges which are substantially completely contained between said plates and adapted to be slidably received in said guide means, co-operating securin means on said base and said carrier, sai carrier having a plurality of sight leaves pivoted thereto by a common pivot, said sight leaves having sight means formed thereon at different distances from their pivot in said plate.

2. In a sight for firearms, a base formed with means for attaching it to a firearm and provided with side plates having inclined guide means, a sight carrier slidably mounted between saidplates, means for securing said sight carrier in any desired position in said guide means, a member pivoted to said sight carrier comprising a plurality of sight leaves having sight means formed thereon at unequal distances from the pivot, the difference in distance of said sight means from said pivot being slightly *'ioet WSTRUMENTS.

greater than the vertical range of adjustment of said sight carrier.

3. In a sight for firearms, an attaching base, a carrier mounted thereon for vertical adjustment with respect thereto, a sight leaf and an auxiliary sight leaf each carried by said carrier and selectively movable to effective and ineffective positions, said sight leaves being of unequal length to afford the use of one for short ranges and the other foi` longer ranges, said sight leaf in its ineffective position lying substantially parallel to the surface of said carrier, said carrier having thereon a range scale denoting the l5 ranges of said sight leaf, said carrier having range scale, affording an alignment of the 2O leaf portion of the secondary scale With the carrier portion thereof when the sight leaf is in the said ineffective position and the auxiliary sight leaf is in effective position,

and a removal from said alignment When 25 said sight leaf is moved to effective position. In Witness whereof I have signed my name hereto this 23 day of May, 1921.

CRAWFORD C. LOOMIS.