US393519A - Island - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

0. D. ROGERS. V

DIE FOR POINTING AND CUTTING OFF NAILS; &c.

Patented Nov. 27, 1888.

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WITN SEES.

N. FETERS, Hwlo-Ulhognpiwr. Wnhin wn. n.

2 Sheets-Sheet 2.

(No Model.)

0. D. ROGERS.

DIE FOR POINTING AND GUTTING OFF NAILS, &c.

Patented Nov. 27, 1888.

FIEHE- INVENTURn.

WITNEEEEE.

Max us a n. PETERS, mwum ner. wnm

UNITED STATES PATENT OFFICE.

cHARLEs 1). ROGERS, or PRoviDENoE, RHODE ISLAND, ASSIGNOR TO THE AMERICAN SCREW ooMPANY, or sAME PLACE.

DIE FOR POINTING AND CUTTING OFF NAILS, 80C.-

sPEoiFIcATxoN forming art of Letters Patent No. 393,519, dated November 27, 1888. Application filed June 14,1838. Serial No, 277,035. (No mocleh) T all whom it may concern.-

I 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 Pointing and Cutting-O ll Dies; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

In the manufacture of screw-blanks, wire nails, and other analogous articles which are produced from a coil of wire the usual practice heretofore has been, so far as I am aware, to sever the blank from. the wire by means of actuated dies which are so formed that the end of the coil is left. substantially square, the dies at the same time producing a pyramidalshaped point on the adjacent en d of the blank. An objection to such form of dies is, more especially in the case of blanks which are to be headed, that the end of the wire upon being subjected to the action of the swaging-dies or heading-hammers has a tendency to bend toward one side of the die, thereby producing heads in which the metal is not uniformly distributed, and resulting in irregular-formed heads. Another objection to said dies is that they produce on the blank a point which (in case the point of the blank is to be screwthreaded) necessitates subjecting it to the action of mechanism adapted to reduce it to a cone shape prior to being acted upon by the threading-dies.

. The objects I havein view in the invention illustrated herewith are to produce a cuttingolf die of such form that when two of them are suitably mounted and operated the action of the dies in sever-in the blank from the wire forms a cone-shaped point having a coinv pressed surface. At the same time the dies produce a rounded or globular form on the end of the standing wire, all as will be hereinafter more fully set forth and claimed.

In the annexed two sheets of drawings, Figure 1 represents a plan view of a portion of a machine for making screw-blanks an d having my improved cutting-off dies mounted therein. Fig. 2 is a partial central sectional view taken on line :r. Fig. 3, Sheet 2, is a horizontal sectional view enlarged, showing the dies at the termination of their movement and having the pointed blank between them. Figs. 4, 5, 6, and 7 represent views of the die. Fig. 8 is a perspective view of the end portion of the wire, showing the rounded end formed by the dies; and Fig. 9 is a perspectim view of the fins or waste stock resulting from the action of the dies in pointing a blank and severing it from the wire.

In an application for Letters Patent filed by me in the United States July 7, 1887, Serial No. 243,657, I have shown and described at length an organized machine for producing headed screw-blan ks. I make no claim therein to any specific form, or construction of the cutting-off dies whichsever the blanks from the coil of wire.

3y referring to the drawings accompanying my present application it will be seen that I have shown in Sheet 1 a portion of a machine arranged more especially for the nntnufacture of wood-screw blanks, the mechanism illustrated being introduced to com'ey a better idea of the relation of my improved cutting-off dies to the heading hammers, &c.

In said drawings, H indicates a holder, in which a series of heading-hammers, 72, are mounted. The holder is adapted to be intermittingl y moved up and down and also to reciprocate back and forth. The wire '20 is fed into the machine by means of dogs (Z, then through the tubular guide 0, mounted in the front frame, B, of themachine, past the grip ping-clamp g, and through the adjustablymounted die ID. The faces of the said hammers h are made progressive-that is to say, the first to act upsets the metal in the die D and forms a preliminary head upon the end of the wire, the next reduces thehead nearer to form, at the same time disposing the metal with reference to the slot to be produced, and the third (when three hammers are used) finishes the head, including the slot. After the head is formed, the feeding mechanism forces the headed wire from the die D and feeds it ahead the desired distance to prod ucethe blank, aft-e which the cutting-off dies-A, mounted on opposite sides of the machine in guided carriers or holders I), are forced toward each other simultaneously by opera-ting mechanism, thereby, when the dies are brought together, acting to point the blank and sever it from the wire. The dies in retreating permit the blanks to fall from them.

I would state in passin that the blanks produced are finished complete (with the exception of the screw-thread) when dropped from the dies, no seam or fin being visible. The nick or slot for the screw-driver is, as before stated, formed in the head by the action of the heading-hammers.

I will now more particularly describe the novel features ct my improved cuttingoff dies.

In the drawings, A designates one of the dies as a whole, which are used in duplicate. The inner end or cutting-face of the die A- is provided with a central cone-shaped recess, r, (one-half being in each die,) in which the end of the blank is swag-ed. The lower side of the die is provided with a concavity, e, communicating with the apex of the recess "1*. The circumscribing edges 91 of the recesses r and r are sl1arpened,t-l1e metal bein g out well back there from to afford. clearance, as clearly shown in 5. By means of this construction it will be seen that when the dies arebronght together upon a piece of wire their actionis not only to point and sever the blank (1, but at the same time they produce a rounded or globular for-m, w, on the end of the standing wire 21'. (See Fig. 3.)

In the process of making the blanks the dies A are so set with relation to the solid die I) that a space, 5-, is left between the adjacent sides of the dies A D, as indicated by Fig. 3. This space corresponds substai'itially with the length of wire protruding from the face of the die D to be upset into the cavityu to form the head 2' of the next blank. 13y means of the rounded portion in the wire is centralized and upset more uniformly by the heading-ham mers 72. nless the rounded end be given to the wire the latter has a tendency to cripple or to bend toward one side of the (lie, thereby producing imperfect blanks,or, in other words, blanks in which the metal of the heads is unequally distributed.

The dies A in the operation of pointing a blank first act upon the wire by means of the sharpened edges mwhich force a portion of the in etalo'fthe w-i re outward] y from them, and at the same time produce a preliminary point. The continued and final action of the dies causes the conical cavity 7 thereof to compress and elongate the metal and form the cone-shaped point p upon the end of the blank, and also, as before stated, shaping the adj aeent end 11* of the wire, as clearly shown by Fig.

The waste metal produced during the foregoing operation is represented by Fig. 9, the relation of the blank and wire thereto being indicated by dotted lines.

I claim as my invention 1. A cutting-off-die ot' the class hereinbefore described, having its working-face provided with a point fo'rming recess, an d also havin cavity arranged to produce a convex-shaped end upon the wire, substantially as set forth.

2. A combined pointing and cutting-off die ln-wing a cone-sh aped cavity and a concave recess communicating with said cavity formed in its working-face, and having the circumscribing edges of the die-cavities adapted for cutting, substantially as shown and described, and :for the purpose hereinbefore set forth.

3. In a machine for making wood -screw blanks, the combination, with wire-feeding mechanism, a mounted heading-die, and actuated heading-hannners, of a pair of reversely mounted and actuated cutting-off dies having the working-faces constructed to engage the wire and reduce it to a coneshaped form, and at the same time sever the blank and produce a convex shape on the end of the wire contiguous to the blanks point preparatory to upset ting the metal into the heading-die, substan tially as hereinbefore described.

4. The combinatiomin a screw-blank machine, of a mounted solid heading-die and two suitably mounted cutting-off and swagingdies, A, having the working or meeting faces thereof provided with a cone-shaped recess or mold,r, communicating with or in close proximity to a concave recess, 1', formed in the lower edge of the dies, substantially as shown and described, and for the purpose hereinbefore set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

, CHARLES D. ROGERS.

\Vitnesses:

CHARLES HANNIGAN, GEO. H. REMINGTON.

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