US99848A - The graphic - Google Patents

Description

, tnited gister parte aan.

J; H. OOLE, OE MILLRURY, As'sreNOR TO SAMUEL?. EMERSON AND AMO Y wnrTE, OE WOROEsTER, MrrssAOnusETTs.

Letters Patent No. 99,848, dated February 15, 1870.

MPRVED DIE AND PLUNG-ER.

The Schedule referred to in these Letters Patent and making part of the samev Know all men by these presents:

That I, J. H. COLE, of Millbury, in the county of Worcester, and Commonwealth oflvlassachusetts, have inventedv certain new and useful Improvements in Die and Plunger for making ferrules, tlrimbles, and other similar articles from blanks of cold wrought iron; `and I do hereby declare that the followings a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in whichr Figure 1 represents a perspective view of the die and plunger;

Figure 2 represents a vertical central section of the die, plunger', and Apartially-formed thirnble; and

Figure 3 represents a perspective view of a ferrule or thirnble formed by the co-acting surfaces of the die and plunger.

To enable those skilled in the art, to which my invention belongs, to make and use the saure, Irwill proceed to describe the said improvement more in detail.

The nature of my present improvement consists in a particular improvement on the device for which Letters Patent were granted to me on the 28tlrday of April, A. l). 1868, as: will be hereafter explained.

Prior to my invention for which said Letters Patent were granted, all attempts to form ferrules or tlrirnbles from cold wrought iron proved unsuccessful.

'In the practice of n'ry said invention, however, I found that while it worked well on a uniform size and thickness of metal blanks, it was' nevertheless defect tive, irr'thatif the blank happened to be thick, it would often form a ferrule with a bur or flange on .the edge a, while'v at the same time endangering the machineryby the sudden stoppage of the plunger. Then, again, foreign matter was liable to accumulate land adhere to the inside of the die, especially to the lower outersurface. Another ditiiculty arose ti'orn tr'ouble in removing the ferrule or tlrimble, and also to loss of power when the blank happened to be thick, which occasioned the sudden stoppage of the plunger, as before explained. -j

' All of the foregoing objections are obviated by my y present improvement. f g

The die A is nrade with a circular'shoulden b, a gradually curved or opening part, c, these parts being curved and shaped as described in the Letters Patent above referred to. For the purposes already mentioned, I, however, form the bottomof the die in a manner different from that shown in said Letters Patent, that is to say, I make it with a straight portion,

d, and then with an enlarged or bottom part or hole, e.'

The operation is as follows;

The blank Of cold wrought met-al B is placed by the attendant upon `the shoulder' b, when the plunger C descends and forces the blank down over the curved part c, and through the straight portion tl, into the enlarged part e.

From the foregoing description it will be seen that all the ferrules or thimbles will be of an uniform size, and further,4 that there will be no bur or flange left on the edge a, since `all the tlrimbles will be forced through the die by means of the.v plunger, and if the blanks vary in thickness, they will be drawn down to l.

a size as they'are forced through between the die A and plunger, C.

" After the ferrules and tlrimbles are made in theforrn shown in fig. 3,'tang-holes of any desired forni may be punched through the closed end thereof.

Having described my device for making ferrules and l thimbles,

What I claim as my invention, and desire to secure by Letters Patent, is-f- As an improvement in the die fory which Letters Patent werev granted me on the 28th April, 1868, the formation of the 'lower' portion of the die with the ,straight part cl and openingr e, substantially in the manner and for the purposes herein shownv 'and specitied.l

y J. H. COLE.. `Witnesses r 'lnos.l H. DODGE,

ALBERT E. PEIRCE.

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