Apparatus for making cores for watch-crowns
US 329284 A
Description (OCR text may contain errors)
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f A. C. DALZBLL.
- APPARATUS POR MAKING GORBS POR WATGHGROWNS.
No. 329,284. Patented'Oot. A27, 18885.
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2 Sheets-#Sheet 2..
A. C. DALZBLL. APPARATUS PoR MAKING GORES POR WATGH GROWNS.
No. 329,284. Patented Oct. 27, 1885.
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UNITED STATES PATENT OEEFE.
ALLAN C. DALZELL, OF NEWPORT, KENTUCKY.
APPARATUS FOR MAKING CORES FOR WATCH-CROWNS.
SPECIFICATION forming part of Letters Patent No. 329.284, dated October Application iilcd April 15, 1885.
To a/ZZ whom, it may concern.-
. Beit known that I, ALLAN C. DALZELL, of the city of Newport, county of Campbell, and State of Kentucky, have invented certain new and useful Improvements in Apparatus for Making Cores for Watch-Crowns, of which the following is a specification.
This invention relates to the apparatus for making corrugated articles-such as watchcrown cores-from solid metallic blanks.
In the manufacture of cores for watchcrowns as heretofore practiced, much diffi- -culty has been experienced in corrugating or ridging the head, the corrugations being as a rule formed by milling, thehead being either turned or rolled into shape. Where the corrugations were formed inthe head ofthe core by milling, it was impossible to provide a stem or collar integral with the head and extending beyond the periphery orbase of the said head,as the milling tool or cutter, in cutting the radial corrugations or ribs upon the under side of the head, would be obstructed thereby, and prevented from cutting the corrugations to apoint flush with said stem,which is absolutely necessary to the perfect tting of the corrugated crown cap or shell, which is subsequently drawn over and fitted to the core-head. In most instances lthe core has been made spherical and corrugated, after which it was tapped,77 and a stem, or what is commonly known as a core-washer,7
screwed therein. p
The purpose of and reasons for corrugating or r1bb1ngthe cores of watch-crowns is obvious tothose skilled in the art, and therefore an explanation is unnecessary.
The object of this invention'is, primarily, to upset a solid wire blank by means of dies having suitable matrix, to form thereby a watchcrown core having a head corrugatd on itsi under side, a'stem,'a teat or projection -at .the apex ofthehead, and a? central cavity in the base of the stem, said cavity enabling the core to be centered during the operation of tapping it for the reception of the key-pipe`; another object of the invention being to form screwthreads upon the stern (or core-washer) by upsetting the metal blank spirally at its lower end simultaneously with the operation of upsetting the blank at its upper end to form the corrugated head, as will be hereinafter clearly 27, leas.
Serial No. 162,294. (No model.)
pointed out. This last operation of screwthreadingthe stem or core-washer is only neces sary with crown-cores used with key-winding watches, or with watches having stationary crowns,which crowns are usually screwed into the pendant, and are provided with push-pins extending out through their centers.
My invention consists incertain details ofconstruction of dies andapparatus to form watch-crown cores from metallic blanks.
Figure 1 represents in side elevation, partially in longitudinal section, a set of dies for forming watch-crown cores from wire blanks constructed in accordance with my invention,
these dies forming a core with corrugations on the under side of its head, denting centrally the stein of the core and forming a teat at the apex of the head, said iigure showing the blank in position to be struck, the guiding-collar down and the upper die elevated; Fig. 2, -a plan view of the lower dies below the dotted line x Fig. 1; Fig. 3, a partial longitudinal section of the dies, showing the blank as struck and formed into a crown-core; Figs. v
et and 5, an enlarged side and plan view, respectively, of the metallic blank from which the core is formed; Figs. 6 and 7, an elevation and under side view, respectively,of the coreblankl after being operated upon by the dies, said figure showing a core with corrugationsI on its under side; Fig. 8, an underside view of the upper die and its guiding-collar; Fig. 9, a side elevation, )artially in seotion,of a set of dies for forming crown-cores from solid blanks and screw-threading their stems, the blank being in position to be operated upon; Fig. 10, a plan view of the screw-threaded lower die, the said die being in two halves;
Fig. 11, a side elevation of the same; Fig. v12,
a longitudinal section of a portion of the dies represented in Fig. 9, the core-blank being shown as pressed into shape; Fig. 13, an enlarged view of a screw-threaded watch-crown core formed from a solid blank by the dies represented in Figs. 9, 10, 11, and 12.
The dies and auxiliaries for forming a crowncore from a solid metallic blank are used with a double-acting press of any ordinary or improved pattern. The dies consist of the upper die or half, A, the lower'die or half, B, and the male center die, C. The upper die,A, works inand is guided in its' movement bya IOO 5 blank.
the said die and its collar being the die-holders or plunger of the press in the usual manner. The upper die, A, is provided with a matrix, a, at its lower end, said matrix being semi-spherical in shape, or substantially so, with smooth surfaces, and a central cavity, a', having preferably a plane face or bottom, which matrix forms the upper half of the crown core-head H and its teat or projection h. The lower die, B, constructed of hardened or chilled steel, is seated in asteel die-box, D, and is provided at its upper central face with a matrix, b, corresponding to the under face, H', of the core-head to be formed, v said matrix having a seri es of radially-extend ed grooves and ridges or corrugations. b', and having a central opening, b2, communicating with the same, said central opening being of a length and of a diameter equal to the lengt-h and diameter of the core washer or stem H2 of the coreG when finished or pressed into shape. By reference to the drawings it will be noticed that the central opening, b2, extends from the matrix b entirely through the die B, and that the die C is inserted in the same from below, which die C is provided with a central projection, c, at its upper end, to form the cavity H3 in the core as it is pressed into shape. `It is obvious that the lower die, B, might have a projection formed as a part thereof, instead of extending the central opening, bz, entirely through the die and inserting the die C, having the projection thereon; but itis preferable to form the lower die, B, and the die G in two pieces, inasmuch as should one or the other become injured they could be replaced with less inconvenience. As shown, the die C is tapered and extends through the steel die-box D, where it is held in place from longitudinal displacement by means of a screw, E, extended through the base-pieceF and screwed into the die C, said screw holding the die-box and die C securely against movement. The lower die, B, is provided with an annulus or downwardly-projecting flange, b, which has its collar, B', connected to bearing in an annular groove formed in the face of the die-box D. The upper face of the lower die, B, is stepped77 or rabbeted, as shown at d d', to form guiding-faces for the collar B and the upper die, A. The bearings thus afforded by the sides of the rabbets d d not only align the collar B with relation to the lower die, but insure accuracy of movement of the upper die, A, when4 operating upon a With the aid of such guides-viz., rabbets d d-the upper die, A, is bound to maintain the same relation with the lower die, B, when upsetting a blank to form acore, and there is no possibility of misshaping a blank by striking it out of line.
I do not desire to limit myself to the special construction of watch-crown cores illustrated in Figs. 6 and 7 of Sheet 1; neither do I desire to limit myself to the exact construction of dies shown in Figs. 1, 2, and 3as, for instance, the matrix b might have a screwthreaded central opening, e, as shown in Fig.
9, Sheet 2, and thc lower die having Said matrix b might be constructed in two halves. as shown iiFigs. ldand 11, in which case said die would be tapered and seated in a tapered opening in the die'box, which die-box would be, provided with springs f, upward aftery the core had that said core might be removed. In either case the die B would be made removable from the die-box D, so that the core after being formed might be driven out of the'matrix in case it became fastened.
The operation of forming the core is as follows, viz: The blank g, of suitable l'engthand diameter, is placed vertically in the central opening, b2, of the lower die, B,which opening corresponds in diameter to the diameter of the blank and supports the same in a vertical position. The upper die, A, and sleeve B are then allowed to descend, the sleeve B coming in contact with the die B before the upper die, A, strikes the metallic blank, the sleeve entering the rabbet d, and thus holding the die B from lateral movement, after which the die A strikes the upper end of the blank, upsetting the same at its upper en'd into the matrix of both the upper and lower dies, the core-head to the exact shape of the matrix of the lower die,(which is corrugated radially, as before described) and to the shape of the upper matrix, which is provided with a cavity, a', as shown, forming the stem or core washer integral with the said head, and forming a cavity in the lower end of said stem central therewith. By this operation it will be seen that the core-head is corrugated or ridged upon its under side from a point flush with the periphery of the stem to a point central to the depth or diameter of the head. It is necessary to extend these corrugations over the upper side of the core-head or past the center, which will be done by means of cutting-dies or dies having cutting-edges, which dies and the process of projecting the corrugations past the center of the head will form the subjectmatter of aseparatc application, marked Case B,7 signed April 1, 1885. The upper die, A, might be provided with a corrugated matrix to form corrugations upon the upper side of the core-head; but the results are not satisfactory when pressing the blank, as the corrugations tend to leave a seam around the head centrally, where they meet the corrugations formed by the matrix of the lower die, B.
Vhen the dies illustrated in Fig. 9 are used, the operation of forming the blank into a core is similar to that with dies shown in-Fig. 1, the metal of the blank being upset spirally atits lower end into the screw-threads of the stemforming opening, to form screw-threads upon the stem of the core, the die B being removed from the die-box to extract the screw-threaded core. 4 y Many different articles might be formed with dies similar to these described with but slight changes therein. For instance, by forming the matrix of the lower die with teeth instead of gi/mailman;
een formed, so
thus forming ros IIO
a patentable invention, I would reserve the `right to make such method the subject-matter of a separate application.
1. In an apparatus for forming watch-crown cores and similar articles from solid metallic blanks, the combination, with the upper die, A, having a matrix preferably semi-spherical in shape, with a central cavity, of the lower die,B,having a corrugated matrix and a central opening, and the die C, projected into said opening, all substantially as and for the purpose described. v
2. In an apparatus for forming watch-crown cores and similar articles from solid metallic blanks, the die B, seated in the die-box D, and having a semi-spherical (or nearly so) matrix provided with radiating corrugations and a central opening, said die B being rabbeted upon its upper face to form guides for the upper die, A, and its collar B', in combinationvwith the upper die, A, provided witha semi-spherical matrix having a central cavity, and its collar B' having a shouldered end to fit n :9; 3 as the rabbet of the lower die, said collar B forming a guide for the upper die and centering it with relation to the blank to be operated upon, substantially as described.
3. The combination, in an apparatus for forming watch-crown cores afd similar articles from solid metallic blanks. of a lower die constructed in two halves, hav` ng a corrugated matrix with a central screw-threaded opening communicating therewith,said die being seated in a die-box, which die-box is provided with springs to bear against the under side of the lower die, said die being tapered, an upper die having a matrix and a collar to guide and direct the movement of the upper die during operation, said dies forming a round metallic blank into a core with a head and stem integral with one another,
corrugating the under side of the headand screw-threading the stem, substantially as described.
4:. In an apparatus for forming watch-crown cores from solid metallic blanks, the lower die, B, having a corrugated matrix and a central stem-forming opening, the vdie C, projected into said opening Y. from :the under side and having a tapered body, in'combination with the die-box D, upper die,A,having a matrix, and the collar B', to guide the upper die, all constructed andarranged substantially as sh own and described.
In witness whereof hand and seal, at Newport, Kentucky, 1st day of April, A. D. 1885.
ALLAN C. DALZELL. [L. s]
N. E. C. WHITNEY, T. l?. CARo'rHERs.
I have hereunto set my this