US737206A - Process of forming tacks. - Google Patents

Description

No. 737,206. v PATIENITEDYAUG. 25, 1903.

G. J. GAPEWBLL.

PROCESS OF FORMING T AGKS.

APPLICATION FILED OOT.1, 1901.

'10 MODEL.

I II III 11111111! 1 IIIIIIIIIIIIII-IIIIIIIII m canton Wane/was I g I @Mu Q UNITED STATES iatented August 25, 1903.

"PATENT. OFFICE.

PROCE SS OF FORMING TACKS.

SPECIFICATIONformingpart of Letters Patent No. 737,206, dated August 25, 1903.

Application filed October 1, 1901. Serial No- 77,23l. (No model.)

To all whom it may concern: I

Be it known that LG CRGE J. CAPEWELL,

a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Processes for Forming Tacks, of which the following is a specification. j y

This invention relates to a process for forming a tack from two pieces of metal.

The object of the invention is to provide a simple process for making a strong tack/with a large solid head out of a minimum amount of metal. I

The process that is illustrated by the accompanying drawings produces a tack that has a solid head which is formed from two different pieces of metal that arepressed together with greatf0rce,so as to bepracticallyhomogeneous and integral with the pointed shank.

Figure 1 is a'side view of the part that is used as the base of the improved tack. Fig. 2 is a side View of a cup that is used to form the exterior ofthe head of the finished tack.

Fig. 3 is a section showing the base placed in the cup, the first-step in thepro'cess of forming the improved tack. Fig. 4'is a plan ofthe. parts shown in 3. Fig. 5 is a section showing the edge of the cup folded down upon the enlarged part of the base, the second step in the process of forming my tack. Fig. 6 is a plan of the parts shown in Fig. 5.

then these parts are subjected to the action of dies, which fold the Wall. of the cup inwardly and downwardly upon the bottomface of the enlargement. The cup is somewhat larger in diameter than the diameter of the enlarged end of the shank, and it is of such depth that when the wall is folded down it will lap upon the bottom face of the enlargement part way.

Fig. 7 is p a section of a finished button-fastener tack.

7 up to the shank. The parts are then subjected tothe action of powerful dies, and the enlarged partof the shank and the inclosing cup are swaged until they are substantially homogeneous. v the cup that when the parts are swaged together all openings and crevices are filled and the inner edge flows inwardly up to the shank while the outer edge spreads outwardly, was to form an enlarged head. The finished head Thereis such an amount of metal in may be swaged to any desired shape, either fiat, as shown in Fig. 7, or curved, as in Fig.

- 9,and may be of any diameter. tack may be j formed in this manner. from a small amount of metal with a large head which is particujlarly solid, for it is practically homogeneous "and integral with the shank, so that it may used for the shank,which is desirable formany purposes.

Thistack forms a particularly desirable button-fastener tack, although it is very serviceable in the shape of a trunk-tack, a leathertack, or an upholsterers tack, which tacks have large heads and are subjected to violent usage and which usually have heads of a metal superior to the metal of the shanks.

I claim as my invention The process of forming a large-headed tack- Which consists in placing an integral enlarged end of a'pointed metallic shank into a metallic cup, folding the walls of the cup about the under side of the enlarged endof theshank and swaging the folded cup and the enlarged end of the shank and causing the metalof the shank end to flow outwardly from the shank and the metal of the cup to flow inwardly toward and outwardly from the shank. until the metals become substantially'hoinogena oils and form a large solid head that isprac- Cally integral with the shank, substantially as specified. g

GEORGE J: APEW'ELL.

WVitnesses:

H. R. WILLIAMS, V. R. HCLCCMB.

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