US464465A - Island - Google Patents

Description

(No Model.)

' G. D. ROGERS.

SCREW EYE.

No. 464,465. Patented Dec. 1, 1891.

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UNITED STATES PATENT OFFICE.

CHARLES D. ROGERS, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE AMERICAN SCREW COMPANY, OF SAME PLACE.

SCREW-EYE.

SPECIFICATION forming part of Letters Patent No. 464,465, dated December 1, 1891.

Application filed August 12, 1891. Serial No. 402,436. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES D. ROGERS, a citizen of the United States, residing at Providence, in the county of Providence and State.

of Rhode Island, have invented'certain new and useful Improvements in Screw-Eyes; and I do hereby declare the following to be a full,

' clear, and exact description of the invention,

. tion.

My invention relates to wire screw-eyes, so-called anditconsists, essentially,of a shank or stem portion having rolled or swaged screwthreads formed thereon, whose diameter exceeds' that of the wire, and having the end of the opposite portion of the wire cut transversely to form a concave groove, so that when such portion of the wire is bent to an eye form the bottom of said groove will fit snugly against the shank, the adjacent lips or sides at the same time extending beyond and practically concealing the joint. There are objections to screw-eyes as usually madeas, for example, they are greatly diminished in strength, their holding power in some cases being reduced more than fifty per cent. by cutting away the stock in forming the threads. The ends are cut off practically square. In forming the eye-joint the corresponding end of the wire is pressed with such force against the shank as to upset the metal, thereby producing on each side a burr or fin, the joint thus made being rough and otherwise objectionable.

The objectI have in View is to produce screw-eyes devoid of the objections just referred to. By means of myimprovement screweyes may be made more cheaply; they are much stronger; they are true and smooth at the joint; the eye is stronger laterally because the side lips extend onto-the shank, thereby partly concealing the joint, and they can be more accurately centered and more readily inserted into wood.

In the accompanying sheet of drawings, Figures 1 and 2 represent plan and side views of a piece ofsuitably-cut wire preparatory to being converted into my improved screweye. Fig. 3 is a side view showing the wire bent to form the finished head or eye.- Fig. 4 is a similar wire, showing the shank provided with an enlarged screw-thread raised from the surface of the metal; and Fig. 5 is a partial side View showing the eye-joint as commonly made. I

In the drawings, b'indicates the blankv or piece of suitable wire, having one end 19 sharpened or cone-shaped and the other out across transversely, so as to form a substantially halfsround groove 0, with upper and lower extending sides or lips o, as represented in Figs. 1 and 2. The blank is next taken and the grooved end portion thereof bent by suitable tools to form a substantially round ey'e or head e, as indicated in Fig. 3. \Vhen thus bent, the bottom of the groove 0 is made to bear snugly against the corresponding side of the shank at the initial point b, where the eye commences, while atthe same time the said lips c extend onto and partly inclose the shank, thereby forming a smooth joint and one devoid of the burrs or fins d, Fig. 5, commonly present in screw-eyes as heretofore made. I

The blanks, headed and pointed as represented in Fig. 3, are next introduced to. the action of suitablyoperating swagingdies, which latter act to raise the metal from the shanks surface in a radial direction, thereby forming screw-threads 1., whose diameter GX-V claimed in United-States Letters Patent N 0.

37 0,354, granted to me September 20, 1887. The dies therein referred to are provided each with a series of obliquely-arranged V-shaped grooves, presenting between them a corresponding series of bars or ribs narrow at the end where they commence to form the thread, so that they may be forced at the commencement of their action into the metal to the depth required to form the body of the screw,

and, gradually increasing in width, act laterally upon the metal between them and force it into the grooves, which give it the form re quired for the thread. In thus rolling the threads the plain shank portion 12 of the screweye blank, Fig. 3, is placed vertically in the space between a suitably-mounted pair'of said dies with their ends reversed, and as they are moved toward each other the blank is seized and rolled between them until the opposite ends of the dies pass each other, when it (the now screw-threaded eye) drops from them complete, as shown by Fig. i, the diameter of the threaded portion being greater than that of the normal size of the wire or shank. (See vertical dotted lines indicated in said figure.)

In a companion application, Serial No. 4102,4537, Ihaved'escribedand claimed a novel formof die for simultaneously cutting oif and pointing the piece of wire 7), adapted to be converted into my improved screw-eye a.

I claim as my invention- 1. As an improved article of manufacture,

a serew-eye having its shank portion provided :25

with a raised screw-thread whose diameter exceeds that of the wire or unthreaded portion.

2. The wire screw-eye substantially as hereinbefore described, having its shank or stem provided with a raised screw-thread whose diameter is greater than that of the wire itself, and having the opposite end of the wire out to a concave form transversely and fitting and inclosing a portion of the shank.

3. A gimlet-pointed screw-eye made of wire, the shank portion having a rolled or swaged serew-t-h read formed thereon and having the end of the wire contiguous to the eye-joint provided with side lips or extensions 0, in contact with and inclosing a portion of the shank, substantially ashereinbetore described, and for the purposeset forth.

In testimonywhereof I haveafiixed my sig' nature in presence of two witnesses.

CHARLES D. ROGERS.

Vitnesses:

CHARLES IIANMGAN, GEO. H. REMINGTON.

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