US1695440A - Gun sight - Google Patents

Description

33- 253; OR 1 9695a440 SR Dec. 18, 1928. 1,695,440

J. H. REDFIELD GUN SIGHT Filed Aug. 14, 1926 Qwmntoz Q Jaw/y fi. it'd/7:20 53; 7"

Patented Dec. 18, 1928.

UNITED STATES PATENT OFFICE.

JOHN H. REDFIELD, OF DENVER, COLORADO, ASSIGNOR TO FRANK IE, KELLOGG, OF DENVER, COLORADO.

GUN. SIGHT.

Application filed August 14, 1926. Serial No. 129,119.

This invention relates to gun sights, more particularly to the type of sight illustrated in Patent Number 830,442. Sights of this character are very difiicult to manufacture owing to the construction of the retaining spring. It is necessary to mill the groove to receive the spring, additional grooves to hold the spring extremities in place, to form the spring to a certain contour and to temper the spring after being formed.

The principal object of this invention is to. reduce the amount of labor required in constructing the springs, preparing the base blocks to receive the springs, and placing the springs in sights of this character, and at the same time produce sights which will be more efiicient in operation, in which the springs will be uniformly tempered, and in which the springs will be securely locked in place.

Another object of the invention is to provide a recess for receiving the spring which will not require any of the usual difiicult milling operations.

A further object of the invention is to provide spring support in which an ordinary flat spring can be placed so that it will not be necessary to form a specially shaped spring and temper the spring after forming;

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efficiency. These will become more apparent from the following description.

In the following detailed description of the invention, reference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. 1 illustrates a cross sectional view through a rotatable sight of the type illustrated in Patent Number 830,442, with the invention in place.

Fig. 2 is a perspective view of the sight of Fig. 1.

Figs. 3 and 4 illustrate steps in the process of forming the spring retainer.

Fig. 5 is a detail view, greatly magnified, illustrating the extremity of the spring retainer after forming.

Fig. 6 is a cross sectional view through a different type of sight employing the same spring construction.

Fig. 7 is a detail view of the type of spring employed with my invention.

All of the figures of the drawing, with the exception of Fig. 6, illustrate enlarged views, the actual sight being much smaller than the illustrations.

The sight comprises a base block 10, in which the usual dove-tail grooves 11 are milled for locking the base block into the sight grooves of a rifle barrel. In the upper face of the block an arcuate spring slot 12 is milled leaving upstanding sides 17. On the sides 17, bearings 13 are formed for the reception of a sight shaft 14, upon which, the sight 15 is rotatably mounted. The sight illustrated in Figs. 1 and 2 carries a plurality of different beads 16. Any one of the beads 16 may be brought to a perpendicular position for use as desired. The sights are maintained in the perpendicular position by a flat leaf spring 9 held in place by the sides 17 of the spring groove 12 and by upset extremities 18 in the spring groove.

The flat leaf spring 9 and the upset extremities 18 form the principal features of this invention. Heretofore it has been necessary to mill a ledge .at each extremity of the spring groove by a vertical milling operation and to form bent extremities on the spring to engage these ledges. In this invention, however, an upsetting tool 19 having a width sub stantially equal to the width of the spring groove 12 is employed after the spring groove 12 has been formed. The tool 19 contains two inwardly beveled surfaces 20 and a rounded bottom 21.

The tool 19 is pressed downwardly by any suitable press until the bottom 21 engages the bottom of the spring groove, as shown in Fig. 4. In moving downwardly, the beveled surfaces 20 engage the extremities of the spring groove 12 and bend or force the metal of the block inwardly, thus forming the upset extremities 18. The bottom 21 acts as a stop to limit the downward movement of the tool.

In Fig. 5 I have illustrated, greatly magnified, one of the upset extremities l8, illustrating the condition in which the beveled surfaces 20 leave the extremities of the spring groove. It will be noted the bending action changes the are of the groove bottom to a smaller radius at the groove extremities.

The spring 9, illustrated in detail in Fig. 7, lies within the spring groove between the upset extremities which prevent its longitudinal movement. The spring 9 is cut from a strip of tempered spring steel, no additional tempering operation is necessary since no forming is done upon the spring.

lVhile I have described thus far the spring as applied to a changeable bead sight, it is desired to be understood that the same process and construction is applicable to all sights which employ a spring for engaging a surface to maintain a sight member in a desired position.

In Fig. 6, I have illustrated a cross section through another common form of sight in which a spring 22 is employed to maintain a sight member 23 in the action position. In this sight, the extremities of a groove in a base 24 are upset at 25, similarly to the previously described form.

l Vhile I have described and illustrated a specific form of the improvement, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what I claim and desire secured by Letters Patent 1s l. A gun sight comprising: a base block having a groove in one of its faces; the bottom of said groove being arcuate and merging With one surface of the block at its extremities; inwardly turned projections at said extremities; a leaf spring in said groove having its ends held by said extremities; and a sight member pivoted in said block and having portions resiliently engaged by said spring to hold the same in adjusted position.

2. A gun sight comprising: a base block having a groove in one of its faces, the bottom of said groove being arcuate and merging with one surface of the block at its extremities, the radius of the arc of said bottom decreasing as said extremities are approached so as to form inwardly turned projections at said extremities; a leaf spring in said groove having its ends held by said extremities; and a sight member pivoted in said block and having portions resiliently engaged by said spring to hold the same in adjusted position.

3. In a gun sight, a base block provided with a groove for receiving a leaf spring, said groove having an arcuate bottom and the extremities of said bottom where it merges with the surface of the block being inwardlyturned whereby to engage the ends of a leaf spring and retain the same in said groove.

l. In a gun sight, a base block provided with a groove in its upper surface for receiving a leaf spring, said groove having an arcuate bottom merging with the surface of said block, said bottom being formed on a radius perpendicular to said upper surface; the extremities of said bottom Where it merges with said surface being inwardly turned whereby to engage the ends of said leaf spring and retain it in said groove.

5. In a gun sight, a base block provided with a groove for receiving a leaf spring, said groove having substantially perpendicular sides and an arcuate bottom merging with the surface of the block; the extremities of said bottom Where it merges with said surface being inwardly turned to form stationary pointed projections arranged to engage the ends of said leaf spring and retain the same in said groove.

In testimony whereof, I afiix my signature.

JOHN H. REDFIELD.

Images