US56321A - Improved shoe for stamping machinery - Google Patents

Description

v P. w.' GATES.

Shoe' for Stamping Madfiine'ry. No. 5 ,321. Patented July 10,1866.

Witnesses I EZeZtoT:

M,- 1 kiwi M .UNITED STATES PATENT OFFICE.

I. W. GATES, OF CHICAGO, ILLINOIS, ASSIGNOR TO HIMSELF AND D. R.

' FRASER, OF SAME PLACE.

IMPROVED SHOE FOR STAMPING MACHINERY.

Specification forming part of Letters Patent No. 56,321, dated July.10, 1866.

To all whom it may concern:

Be it known that I, 1?. WV. GATES, of Ohicago, in the county of Cook and State of Illinois, have invented a new and useful Mode of Constructing a Shoe for Stamping Machincry; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanyin g drawings, forming part of this specification, in which- Figure]. is a central section of my improved shoe as it appears when connected to a stamphead of an ore crushing machine. Fig. 2 shows a like section of said shoe, the casting of it having just been completed in the ordi nary sand mold, the base of the shoe being poured first in. the mold. Fig. 3 represents a view of the improved shoe when the casting of the same has just been completed in an ordinary sand mold, but with the stem of the shoe inverted and at the bottom of the mold, the metal composing the stem having been poured in the mold an instant prior to pouring in the hard metal which composes the base of the shoe, as shown in working position in Fig. 1. Fig. 4 is a similar view to Fig. 2, but with the base of the shoe cast in a chill-flask, while the stem is cast in an ordinary sand mold. Fig. 5 is a plan view of Fig. 4 with the sand flask removed.

The object of my invention is to overcome the difficulty heretofore existing in that part of stamping machinery known as the shoe, my present improvement being in addition to those heretofore made by me.

In stamping machinery, where the shoe is made of hard metal and with a stem, by means of which the shoe is connected to the stamphead, it is of great importance to have the stem of soft metal, in order to readily and properly turn it down, and so fit it that the shoe will be securely held in position with the stamp-head, and also not snap off by reason of brittleness.

My present improvement secures all the advantages of a soft-metal stem and a hard-metal shoe, while at the same time the product of my invention, as a whole, possesses all the advantages of an entire and homogeneous casting, notwithstanding its parts are composed of metals possessing different and distinct qualities of hardness.

In Figs. 2 and 3 my improved shoe is indicated as having been cast in the common sand mold. In Fig. 2 the flask or mold A, with the inclosed sand B, is made to contain the entire casting, the lower portion of it (representedin blue tint and marked 0) composing the shoe, while that part indicated in dark color and marked D is the stem of the shoe, the metal of the same being poured in at the ingate e.

Preparatory to such casting I have two cupolas in operation, one of which is ready to run very hardiron, while the other is readyto run soft iron. I then, if the casting is to be made in the position indicated in Fig. 2, first pour sufficient of the hard metal into the mold to form the base or shoe O of the casting, and instantly thereafter pour into the mold sufficient of the soft metal to constitute the stem D. The pouring of the two molten metals bein gdone almost simultaneously, the soft metal, .in the act of pouring, will flow into and infuse itself into the larger mass G, as indicated in Fig. 2, in which condition the mass will become cool and integrated when cold, the same as if the whole were composed of a single quality of metal, while at the same time the lower portion or shoe, 0, will be made of very hard or chill iron, and the upper part or stem, D, of soft iron.

It will thus be seen that in the simple act of casting I produce a shoe in a single piece of metal, which possesses all the qualities of resistance to wear on its working-face, with the necessary softness of metal in its stem to admit of that part being cut, filed, or in any proper way fitted for the purpose of forming a connection with the stamp -head F, as indicated in Fig. 1.

Sometimes it may be desirable to pour the hard metal into a chill-flask, as at E, Fig. 4, for the purpose of giving the hard metal additional hardness, in which case the soft-metal stem D is formed in a sand mold, the same as in Fig. 2.

In Fig. 3 I have shown the shoe cast in a sand mold in an inverted position. I prefer, however, to cast it in the position shown in Fig. 2.

I would here remark that although I have I shoeforstampingmachinery, producedby castdescribed the stem of my shoe as being made ing hard and soft metal together while both of soft iron, I do not mean to confine myself are in a molten state, the soft metal forming to such soft metal, for that part of my shoe thestemof the shoe, while the hard metalforms might with advantage be made of other soft thebodyofthe shoe, substantially asdescribed. metals or alloys of metals.

Having thus described my invention what GATES I claim as new, and desire to secure by Letters Patent of the United States, is

As a new article of manufacture, a solid Witnesses J. L. FARGO, L. D. TURNER.

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