US2331903A - Sight - Google Patents

Description

mmuwu HUU"! 33-253 OR 293319963 SR c. GARAND 2,331,903

S IGHT Filed Jan. 26'. 1942 /4 66a 64 John [L Garand (i3. ULUIVHZIFHLIAL INC) i HUWHLN l C):

Patented Oct. 19, 1943 9563 Hi HUUI".

UNITED STATES PATENT OFFICE (Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 0. G. 757) 2 Claims.

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to a sighting device.

An object of this invention is to provide a sight which may be adjusted easily and quickly and to provide holding means for the sight in adjusted position.

Another object of this invention is to provide an improved adjustable sight for a firearm.

The specific nature of the invention as well as other objects and advantages thereof will clearly appear from a description of a preferred embodiment as shown in the accompanying drawing in which:

Fig. 1 is a sectional view through the center of the sight assembly taken substantially on line ll of Fig. 3.

Fig. 2 is a plan view of the sight assembly on a portion of the firearm.

Fig. 3 is an end view of the sight assembly.

Fig. 4 is a side view of the sight.

Fig. 5 is an end View of the sight.

Fig. 6 is a plan view of the sight spring.

Fig. '7 is an end view of the sight spring.

Fig. 8 is a section on the line 88 of Fig. 2.

Referring to the drawing in which like numerals designate like parts the L-shaped sight 55 is adapted to fit between the spaced projections 301, 30g of the sight base 30 and the screw threaded portion 55a is adapted to turn on the screw threaded portion 66a of screw 66 which has a reduced portion 66b insertable in the base hole 300; the screw head 560 is fixed in base hole 30d by means of a tapered pin 51 fitting in the tapered base hole 306.

Downwardly extending base arms 30a, 30b are adapted to partially encircle the supporting member, in this case the round portion A of a gun receiver, and to be fixed thereto by means of suitable fastening means which may partake of screws, rivets, etc.

A flat spring 64 having projections 54a, 64b, 64c, 64d which partially surround the base projections 30m, 3011, 30p, 30g allow a limited movement of the spring 64 relative to the base 30 when the center portion of the spring is depressed downwards into the base hollow portion 301' due to the movement of sight edge 55b during the sight adjusting operation,

The sight 55 is L-shaped and has two sighting apertures 55c and 5512 which are displaced unequal distances from the sight rotation axis and it is understood that sighting means other than the particular apertures shown may be incorporated on the two legs of the L-shaped member. In this particular embodiment of the invention, the sight itself is displaced laterally approximately one-quarter of the pitch of the screw threads on portion 551:. as the sight is rotated during the sighting operation; this amount of lateral shift is readily deduced and in fact may be controlled by proper selection of the pitch of the screw threads on portion 55a. Such lateral shift is preferably utilized to compensate for the natural deviation of the projectile at different ranges due to its rotational movement.

In normal operation the spring 64 is flexed a small amount by the sight so that it is positively held by the spring 64 in its adjusted position. Essentially the spring 64 is supported at its ends on the base portions 30x, 30g and the series of base projections 30m, 31m, 30p, 30q cooperate with spring projections 64a, 64b, 64c, 64d and allow a limited movement of the spring 64 as it is fiexed by the sight.

Hole 30c (Fig. 8) in base projection 30f is tapered with the smallest diameters of the hole 302 in the most vertical position so that the tapered portion of dowel pin 61 binds with the tapered walls of hole 306 when the pin is driven in the vertical direction. If the pin 61 should become loose in the hole 30c the body portion of receiver A would prevent the pin from dropping out of hole Me.

I claim:

1. A sight assembly including a base with a pair of spaced projections having aligned holes therein, a member having an L-shaped cross section and disposed between the projections, a sight mounted on each of the legs of the L-shaped member, said L-shaped member having a threaded hole extending therethrough in the vicinity of the junction of the two legs of the L-shaped member with the axis of the hole perpendicular to the plane of the L-shaped cross section, said sights being unequally radially displaced from said threaded hole, thereby permitting sighting at two ranges of target distance, a pin passing through the aligned holes and having a threaded portion cooperating with the threaded hole of the L-shaped member, the pitch of such threads being such as to compensate for the difference in projectile drift when using either sight.

2. A sight assembly including, a base having a hollow portion therein, a resilient member substantially covering the hollow portion and supported on the base, a pair of spaced projections on the base and on opposite sides of the hollow portion, said spaced projections having aligned holes therein, a member having an L-shaped cross section with one of the legs of the L abutting the resilient member, a sight on each of the legs of the L-shaped member, said L-shaped member having a threaded hole extending therethrough in the vicinity of the junction of the two legs of the L-shaped member with the axis of the hole perpendicular to the plane of the L- shaped cross section, said sights being unequally 10 radially displaced from said threaded hole, thereby permitting accurate sighting at two ranges of target distance, a pin passing through the aligned holes and having a threaded portion cooperating with the threaded hole of the L-shaped member, the pitch of such threads being such as to compensate for the difference in projectile drift when using either sight.

JOHN C. GARAND.

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