US152266A - Improvement in manufacture of spoons - Google Patents

Description

2Sheets--Sheet1. W. D. WHITING.

Manufacture of Spoons. N0. 152,266. Patentedjune 23,1874.

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UNITED STATES PATENT FFICE.

WILLIAM D; WHITING, OF ATTLEBOROUGH, MASSACHUSETTS, ASSIGNOR TO THE WHITING MANUFACTURING COMPANY.

IMPROVEMENT IN MANUFACTURE OF SPOONS.

Spscification forming part of Letters Patent No. 152,266, dated June :23, 1874; application filed March 13, 1874.

To all whom it may concern:

Be it known that I, WILLIAM D. WHITING, silversmith, of Attleborough, Bristol county, Massachusetts, have invented a certain Improved Method of Manufacture of Spoons and analogous articles, of which the following is a specification:

It has long been desired to produce perfect spoons by a small number of simple operations. I have invented means of overcoming some of the most serious difficulties, and am able to stamp spoons completely formed and set at a single operation, and to clip them complete at another, so as to involve very little labor or skill. My method involves the employment of larger blanks than usual, but the loss from remelting the metal thus used is insignificant compared with the economy in the other points.

I can, by my method, produce spoons richly decorated in cameo on both faces of the handle, and with the bowl perfectly dished, without wrinkles. The method involves some laws applicable both in coining and sheet-metal raising.

It has been attempted to stamp spoons complete; but no one, so far as I am aware, has so wrought that such spoons could be afterward clipped, like sheet-metal shells, by a single operation in a pair of clipping-(lies.

Referring now principally to the handle,

there is almost necessarily, when the spoon is struck from a sufficiently-large blank, to completely fill the pattern, a fin or thin selvage extending out from the edge beyond the bound-- ary of the spoon. One of the difficulties in clipping such spoons as ordinarily struck lies in the necessity for making the plunger or male elipping-die extend down along the edge of the stamped spoon to reach the fin, and act on it directly. If such extension is sufficiently wide to give strength it involves the clipping out of a piece much larger than the spoon. Without such extension of the plunger down the edge, and with a plunger acting only on the edge, there is a liability to the curling upward of the pin, and a contortion of the metal, and dragging and abrading in the act of cutting ofi the tin. In some modes of working which have been attempted, a difficulty is experienced in placing the spoon in the right position for accurate shearing. I have done much to overcome all these difficulties,

by simply causing the fin to extend out from.

the edge of the upper face of the spoon in= stead of extending out from a line at or near the middle of the thickness of the spoon.

Referring now to the bowl, a difficulty, as ordinarily conducted, lies in the tendency to crinkling at the edge of the bowl. This is so serious as in many cases to induce the dapping of this portion by a great number of gentle blows, holding the spoon and moving it by the hand. I have discovered that the crinklin g may be overcome in the rapid stamping process, by so constructing the dies as to compress and thin the metal only along a narrow margin, immediately adjacent to the edge of the spoon, and to leave a liberal quantity of stout metal in the blank outside thereof.

The following is a description of what I consider the best means of carrying out the invention. The accompanying drawings form a part of this specification.

Figures 1, 2, 3, 6, 7, 8, and 9 represent the stamping'dies. Fig.1 is a side elevation of the upper stamping-die; Fig. 2, a corresponding View of the lower stamping-die; Fig. 3, a plan view of the latter. Figs. 4, 5, and 10 represent the clipping-dies, by which the previously-stamped and set spoon is cut out from the broad margin which I leave around it. Fig. 4 is a centrallongitudinal section of the lower part of the upper clippingdie,sometimes called a plunger. Fig. 5 is a corresponding section of the lower clipping-die. The clipping-dies, Figs. 4 and 5, are represented in the proper relation to each other for working together. Fig. 6 is a transverse section through the bowl of the spoon, in the act of being formed or raised in the stamping-dies. It represents an early stage in the raising process. Fig. 7

is a corresponding view, representing a more advanced stage. Fig. 8 is a corresponding view representing the raising completed. Fig. 9 is a transverse section through the handle of the spoon,in the act of being stamped in the stamping-dies. The succeeding figure, Fig. 10, represents the same in the act of being clipped in the clipping-dies. Both these Figs. 9 and 10 are on a larger scale.

Similar letters of reference indicate like parts in all the figures.

A is the beddie, having the hollow for the bowl, and having the space for nearly the entire handle sunk in its curved face, with the proper devices produced therein in intaglt'o for the decoration. B is a moving die, having a surface, b, of corresponding form to the spoon, and a little larger, projecting a little more than the thickness of a spoon below the general face. This projecting or raised portion on the die B may be also formed with decorative devices. The edge of the raised surface I) is beveled, as shown by b. M is a rectangular piece of sheet metal, previously graduated in thickness by rolling, so that the ends are just sufficiently thinner than the middle, as has long been practiced in spoonmaking.

In operating, this blank is placed with one end abutting a shoulder, a, of the die A. On the powerful descent of the die B, by being carried in a heavy hammer, or otherwise, a spoon is completely shaped and set.

Thefaces of the clipping-dies O D are shaped to correspond with the set of the spoon. The face of the upper die or plunger D corresponds in outline to the outline of a spoon. The lower die, 0, has a corresponding cavity. When the blank prepared in the dies A B is applied in the clipping-dies C D the cavity in the lower die 0 receives nearly the whole thickness of the spoon, and bears around its entire edge, fitting fairly against the under face of the fin. Now, the upper clipping die D, being depressed, smoothly shears out the spoon. The slightly-enlarged pattern I) b 011 the upper stampingdie B compresses the metal and reduces its thickness along a little breadth-- say, one-thirty-second of an inch widequite around the edge of the spoon; but the rest of the metal outside of the spoon is left with its full original thickness.

By my mode of operation, while the material of the bowl is being drawn inward, and the material along its rim is being compresed together, the stout portion of the blank outside of the spoon supports it against wrinkling.

I have determined by experiment that, without involving any destructive waste, I can by these dies form entire spoons from these large blanks very completely.

The width of the rectangular blanks may be made less than represented; but a contraction beyond a certain breadth will involve a risk of spoiling the spoon. Having a due regard for economy, I prefer to give the sheet metal a breadth about one and a half times the extreme breadth of the finished bowl.

The stout metal or unaffected outer portion of the blank is kept in the proper position during the stamping process by the form of the stamping-dies, which are adapted to hold the said blank metal against being curled up, so that the struck up spoon, with the stout outside metal attached, comes from the stamping dies bent to the general longitudinal curvature of the spoon; but not much bent or curled transversely. WVhen in the shearing-dies the stout metal outside performs a further useful function in aiding to keep the fin in the proper position during the shearin Although I have described the process as applying to spoons of the ordinary form, and known as simply tea-spoons, and have experimented on such, I believe my invention may be applied with success in the manufacture of the variously-scalloped devices known as sugar-spoons, fruit spoons, or the like, and also in the manufacture of ladies, forks, and other articles of table use, either of silver or other malleable metals.

I have designated the entire space for the spoon, including both the handle and bowl, which is sunk in the lower die by the single letter a.

Some of the advantages due to certain fea tures of the invention may be separately enumerated as follows: First, by reason of the fact that the selvage is partially pinched off and extended out from the edge of one face, instead of, as usual, from the middle of the the thickness, I am able to use a clipping-die having a thick and strong form, as shown by D second, by reason of the raised pattern bl) extending a little outside of the edge of the sunk pattern in the opposite die, as shown, leaving a space outside for the thick stout metal in the blank to remain unaffected, I am able to support the metal of the bowl by such stout outside metal, and cause it to stretch in the bottom of the bowl without much contracting of the rim, and without danger of forming wrinkles; and am also able to support the thin fin against being bent up under the action of the shearing-dies; third, by reason of the thin fin or selvage extending from the edge of one face, and also the stout border outside of such compressed narrow selvage,I am able to form the spoon complete at a single operation on one pair of stampingdies, and to conveniently place it in position and treat it by thick-edged and durable dies in clipping it.

I claim as my invention- 1. The within-described method of striking a spoon in dies, so as to leave abroad and thick margin outside of a thin border or selvage extending along the edge, as and for the purposes specified.

2. The method of forming, setting, and clipping spoons by stamping in form with a thinned selvage connecting thereto along the edge of one face, and also preserving a stout border outside of such thin selvage, so as to clip it complete in stout-edged dies at a single succeding operation, as specified.

In testimony whereof I have hereunto set my hand this 6th day of March, 1874, in the presence of two subscribing witnesses.

V. D. XVHITING.

Vitncsses:

THOMAS D. SrE'rsoN, F. DICKENSON, Jr.

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