US2398309A - Gun sight - Google Patents

Description

tatlmt My ll ll Mimi l l Patented Apr. 9, 1946 UNITED STATES PATENT OFFICE GUN SIGHT John D. Howell, Ilion, N. Y., assignor to Remington Arms Company, Inc., Bridgeport, Conn., a corporation of Delaware Application February 29, 1944, Serial No. 524,355

9 Claims.

tion, the adjustable step member being shown in its zero or shortest range position.

Fig. 2 is a plan view thereof.

Fig. 3 is a fragmentary longitudinal sectional member engaged as a support beneath the end of view, on an enlarged scale, showing the Step the leaf spring arm upon which the rear sight her in an intermediate position of range adjustis carried. Because of slight variations between ment, the rear sight being elevated with respect individual guns and the fact that a correct sight to the zero position shown in Figs. 1 and 2. for one man may be incorrect for another, due Fig. 4 is a vertical transverse sectional view to individual differences in shooting technique taken along the line 4-4 of Fig. 3. and in eye correlation in sighting the target along Fig. 5 is a vertical transverse sectional view the sights, it is desirable that a simple and efiitaken along the line 55 of Fig. 3. cient means be provided for zeroing the sight Fig. 6 is a side elevation of the step member at the correct height for the individual gun and and its supporting cradle, according to a modified its user, and it is an object of the present invenform of the invention. tion to provide an adjustment means of this Fig. 7 is a front end view of the cradle shown in character, A further object is to provide such Fig. 6. zeroing adjustment means through which the Similar reference characters indicate correstep member may be raised or lowered through sponding parts throughout the several figures of slight increments of movement without changing the drawing. the normal angle of the range steps of the step Referring to the drawin the gun barrel I0 is member, to the end that the height adjustment provided at its upper side with a dovetail mortise in the zero or shortest range position of the sight II in which the dovetail tenon I! of the leaf will not change the relative elevation of the sucspring arm [3 of the rear sight is engaged and secessive range steps with respect to each other, cured, the rear sight being integrally formed upon and consequently will not destroy the calculated the rear end of the arm l3, and consisting of an correlation between the individual steps and preupwardly projecting rearwardly inclined flange designated ranges. l4 having its rearwardly facing observable surface It is proposed, according to the illustrated exl5 ground to a flat plane and provided centrally emplary embodiment of the invention, to provide of its upper edge with an open sight notch IS. a longitudinally adjustable supporting cradle for The leaf spring arm I3 is provided with a longithe step member, adapted through relative longi tudinally extending slot l1 extending forwardly tudinal movement to lower or elevate the step from the flange l4, and within which the adjustmember while maintaining it in exact parallel reable step member is adapted to be slidably enlation,- and whereby the individual steps of the gaged, as will presently more fully appear, the step member remain in the same angular relation lower edge of the flange l4 within the rearward to the axis of the gun, and represent the same inend of the slot being ground at a rearwardly and crements of elevation, in any position of zeroing downwardly inclined angle to provide a step enadjustment. gaging tooth edge [8. The upper side of the gun Another object is to provide a zeroing adjustbarrel I0 is provided with alongitudinally extendment means which will effectually maintain its ing slot I9 centrally aligned with the slot l1, and adjusted relation, while permitting convenient in which the adjustable cradle and step members re-adjustment when desired and easy operation are slidably engaged and retained as a sub-asof the step member for normal range adjustment sembly through the tension of the leaf spring of the rear sight. arm l3, as will presently more fully appear.

With the above and other objects in view, em- The step adjustment means for the rear sight bodiments of the invention are shown in the acis in the form of a two-piece sub-assembly, comcompanying drawing, and these embodiments prising the step member engaged with the rear will be hereinafter more fully described with refsight and a cradle member carrying the step erence thereto, and the invention will be finally member and engaged within the slot IQ of the pointed out in the claims. gun barrel. It is to be understood, of course, that In the drawing: the cradle member can be carried directly on the Fig. 1 is a side elevation of the rearward porbarrel surface without a slot therein, the cradle tion of a gun barrel, showing a rear sight assemand sight step being held in place by the leaf bly according to one embodiment of the invenspring arm 13. The cradle member 20 is of U- shape in cross section having a horizontal flat base portion provided at its rearward end with an upwardly and rearwardly inclined ramp 2| and adjacent its forward end with a transversely disposed knife edge support 22, formed by lancing out a pair of support portions 23 from the opposed side walls of the cradle and bending these portions inwardly and then vertically in contact with each other, as shown clearly in Fig. 5. The side walls of the cradle member are projected upwardlyabove the ramp 2| and above the knife edge 22, as at 24 and 25, and are bent inwardly toward each other at a slight angle for the purpose of frictionally retaining the relatively adjusted pcsition of the step member within the cradle member, as will presently more fully appear. Between the upwardly extending side wall portions 24 and v25 the upper edges of the side walls are arched downwardly, as at 26, to substantially clear the step formation in the upper side of the step member.

The step member 21 is of substantially the same length as the cradle member, and is provided at the rearward end of its under surface with a bearing foot portion 28, disposed at a corresponding angle to the ramp 2| and slideably engaged thereon. At the forward end of its under surface, the step member is provided with a series of relatively small teeth or serrations 29, disposed along an inclined plane parallel to the inclined plane of the foot portion 28 and the ramp 2 and of a length substantially corresponding to the length of the ramp. These serrations are engaged by the knife edge 22 at substantially the same point intermediate their ends as the point of engagement of the foot portion 28 intermediate the ends of the ramp 2|, the height of the knife edge being so calculated that it supports the step member in parallel relation to the cradle member in any position of longitudinal adjustment of the cradle member relatively to the step member. The knife edge 22 is in the form of an inverted v, having an angle shown for example as approximately 45 at each side of the vertical plane of the knife edge, and the tooth formations 29 are at the same angle so that, through their disposition in an inclined plane, these tooth formations face forwardly and thus resist relative rearward movement of the cradle member relatively to the step member, this being the normal ratcheting direction of adjustment of the step member relatively to the rear sight.

The step member is provided in its upper surface with a series of height adjusting step formations 30 of gradually increasing height forwardly, and which are engaged by the tooth |8 of the rear sight so that by forward adjustment of the step the open sight notch of the rear sight is adjusted for predesignated ranges, the rearward or lowest step formation being the zero point representing the shortest range. The cradle member and the step member constitute a sub-assembly disposed in cooperative relation in the slot IQ of the gun barrel and in the slot I! of the leaf spring arm l3 of the rear sight, this sub-assembly normally operating as a unit for range adjustment through the frictional retension of one with respect to the other by means of the inwardly bent gripping sides of the cradle member and the interlocking engagement of the knife edge with the teeth 29. As these teeth are in opposite direction to the direction of the steps 30 the sub-assembly may be range adjusted rearwardly as a unit through ratcheting engagement with the rear sight, without changing the zeroing adjustment, forward range adjustment being carried out by lifting the rear sight out of engagement with the step member.

In operation the rear sight is set at the zero adjustment, as shown in Figs. 1 and 2, and thereupon the cradle member is longitudinally adjusted with respect to the step member to bring the step member to the desired zeroing height for the individual gun and its user. In any position of height adjustment the step member remains in parallel relation to the cradle member, so that there is no change in the relation between the height increments of the steps for predesignated ranges. After such zeroing adjustment the subassembly, constituted by the cradle member and the step member, is operated as a unit in the normal manner of the usual adjustable step, Fig. 3 illustrating one range adjustment of the sub-as sembly with respect to the zero position as shown in Figs. 1 and 2.

In Figs. 6 and 7 there is illustrated a modified form of cradle member in which the knife edge 22 is formed by bending upwardly and rearwardly a lanced out portion 3| at the forward end of the base of the cradle member, this portion being at a 45 angle and its end being ground to a transverse flat face 32 at right angles thereto, so that this end face constitutes with the inclined surface of the portion 3| a knife edge. Its cooperation with the step member is substantially identical with the embodiment of the invention shown in Figs. 1 to 5.

The form of the invention illustrated in the drawing and described herein is typical and illustrative only, and it is evident that the invention is capable of embodiments in other forms.

What is claimed is:

1. In a gun sight for attachment to a gun barrel, a height adjustable sight member supportable upon the barrel longitudinally of its axis, a longitudinally movable range adjustment member engageable with said sight member to raise and lower it, a longitudinally movable height adjusting member, and a pair of longitudinally spaced correspondingly inclined ramp means cooperating between said height adjusting member and said range adjustment member to height adjust said range adjustment member uniformly along its length whereby a given angular relation to the axis of the gun barrel is maintained in any position of height adjustment of said range adjustment member.

2. In a gun sight for attachment to a gun barrel, a height adjustable sight member supportable upon the barrel longitudinally of its axis, a longitudinally movable range adjustment member engageable with said sight member to raise and lower it, a longitudinally movable height adjusting member, and a pair of longitudinally spaced correspondingly inclined ramp means cooperating between said height adjusting member and said range adjustment member to height adjust said range adjustment member uniformly along its length whereby a given angular relation to the axis of the gun barrel is maintained in any position of height adjustment of said range adjustment member, at least one of said ramp means comprising a series of tooth serrations on one of said members and. a knife edge on the other of said members.

3. In a gun sight for attachment to a gun barrel, a height adjustable sight member supportable upon the barrel longitudinally of its axis, a longitudinally movable range adjustment member engageable with said sight member to raise and \JUI ULUWH... luv..... w v

lower it, a longitudinally movable height adjusting member, and a pair of longitudinally spaced correspondingly inclined ramp means cooperating between said height adjusting member and said range adjustment member to height adjust said range adjustment member uniformly along its length whereby a given angular relation to the axis of the gun barrel is maintained in any position of height adjustment of said range adjustment member, one of said ramp means comprising a series of serrations on one of said members and a knife edge on the other of said members, and the other of said ramp means comprising a bearing foot on said one member and an inclined surface on said other member.

4. In a gun sight for attachment to a gun barrel, a height adjustable sight member supportable upon the barrel longitudinally of its axis, a longitudinally movable range adjustment member engageable with said sight member to raise and lower it, a longitudinally movable height adjusting member, and a pair of longitudinally spaced correspondingly inclined ramp means cooperating between said height adjusting member and said range adjustment member to height adjust said range adjustment member uniformly along its length whereby a given angular relation to the axis of the gun barrel is maintained in any position of height adjustment of said range adjustment member, one of said ramp means comprising a series of serrations on said range adjustment member and a knife edge on said height adjusting member, and the other of said ramp means comprising a bearing foot on said range adjusting member and an inclined surface on said height adjusting member.

5. In a gun sight for attachment to a gun barrel, a height adjustable leaf spring sight member supportable upon the barrel longitudinally of its axis, and having a longitudinal slot, a longitudinally movable range adjustment step member engageable in said slot adapted through longitudinal movement to raise and lower said sight member, a cradle member carrying said step member and longitudinally adjustable relatively thereto, and ramp means cooperating between said cradle and step members adapted to height adjust said step member, whereby a given angular relation to the gun barrel is maintained in any position of height adjustment of said step member.

6. In a gun sight for attachment to a gun barrel, a height adjustable leaf spring sight member supportable upon the barrel longitudinally of its axis, and having a longitudinal slot, a longitudinally movable range adjustment step member engageable in said slot adapted through longitudinal movement to raise and lower said sight member, a cradle member carrying said step member and longitudinally adjustable relatively thereto, and comprising a base and upwardly extending side walls clampingly engaged with the sides of said step member to frictionally retain said cradle and step members against relative longitudinal movement, and ramp means cooperating between said cradle and step members adapted to height adjust said step member, whereby a given angular WWW MB H I Jill I relation to the gun barrel is maintained in a position of height adjustment of said step member.

'7. In a gun sight for attachment to a gun barrel, a height adjustable leaf spring sight member supportable upon the barrel longitudinally of its axis, and having a longitudinal slot, 2. longitudinally movable range adjustment step member engageable in said slot adapted through longitudinal movement to raise and lower said sight member, a cradle member carrying said step member and longitudinally adjustable relatively thereto, and comprising a base and side walls, and ramp means cooperating between said cradle and step members adapted to height adjust said step member, whereby a given angular relation to the gun barrel is maintained in any position of height adjustment of said step member, said ramp means including a series of toothserrations on the under side of said step member and a knife edge on said cradle member interlockingly engaged with said tooth serrations.

8. In a gun sight for attachment to a gun barrel, a, height adjustable leaf spring sight member supportable upon the barrel longitudinally of its axis, and having a longitudinal slot, a longitudinally movable range adjustment step member engageable in said slot adapted through longitudinal movement to raise and lower said sight member, a cradle member carrying said step member and longitudinally adjustable relatively thereto, and comprising a base and side walls, and ramp means cooperating between said cradle and step members adapted to height adjust said step member, whereby a given angular relation to the gun barrel is maintained in any position of height adjustment of said step member, said ramp means including a series of tooth serrations on the under side of said step member and a knife edge on said cradle member interlockingly engaged with said tooth serrations, said knife edge consisting of a pair of pointed support portions extended inwardly from said side walls.

9. In a gun sight for attachment to a gun barrel, a height adjustable leaf spring sight member supportable upon the barrel longitudinally of its axis, and having a longitudinal slot, a longitudinally movable range adjustment step member engageable in said slot adapted through longitudinal movement to raise and lower said sight member, a cradle member carrying said step member and longitudinally adjustable relatively thereto, and comprising a base and side walls, and ramp means cooperating between said cradle and step members adapted to height adjust said step member, whereby a given angular relation to the gun barrel is maintained in any position of height adjustment of said step member, said ramp means including a series of tooth serrations on the under side of said step member and a knife edge on said cradle member interlockingly engaged with said tooth serrations, said knife edge consisting of an fextension oi. said base inclined upwardly thererom.

JOHN D. HOWELL.

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