US703493A

US703493A - Ring.

Info

Publication number: US703493A
Application number: US7789801A
Authority: US
Inventors: Frank R Stafford
Original assignee: Stafford & Russell Manufacturing Co
Current assignee: Stafford & Russell Manufacturing Co
Priority date: 1901-10-07
Filing date: 1901-10-07
Publication date: 1902-07-01
Anticipated expiration: 1919-07-01

Description

No. 703,493..y

' 1 F. R. STAFFORD.

(Ilo Model.)

1-v MKM 'Flan/5; 5555.

' UNITED f STATES PATENT OFFICE.'

FRANK R. STAFFORD, OF PROVIDENCE, RHODE ISLAND, ASSICNOR To STAFFORD & RUSSELL MANUFACTURINGr COMPANY, OF SACO, MAINE,

A CORPORATION OFIMAINE.

RINO.

o SPECIFICATION formingpart of Letters Patent No.703,493, dated July 1, 1902.

I Application filed October 7,1901. Serial No. 77,898. (No model.)

gaging the stock for the ringf'blank and for holding the same while it is out by a suitable plunger into thedesired lengths. Fig. 2 is a top plan view of one of the ring-blanks from which myimproved ring is made. Fig. 3 is 1 an edge or side viewof the same. Fig. 4 is a View in vertical section of thedraw-plate and plungers, together with the stock therein undergoing the drawing operation. Fig. 5 shows in enlarged central longitudinal section (on the minor axis) the cupped-up ring-blank produced by the operation illustrated in Fig. 4 at a.ti1ne just ybefore the bottom portion thereof has-been perforated. Fig. 6 is a top plan viewof the blank after it hasbeen drawn and perforated by the operation illustrated in Fig. 4. Fig. 7 is an end View of the same. Fig. 8 is a top plan view ofthe Central piece which has been removed from the ring-blank by the perforating operation Aillustrated in Fig. 4. Fig. l9 is an'end view of the same. Fig. 10 is a top plan view of the drawn and perforated blank shown in Fig. 6 aftergit has been opened out by a proper tool into a circular form. Fig.' 11 is an enlarged view of said ring as seen on lineas of Fig. 1 0. Fig.

12 shows in diametrical section the blanki illustrated in' Fig. 1'1 after thesame has been formed with an-annular groove on each of its edges` and the outersurface has been ConveXed. Fig. 13 is a diametrical section :of the grooved and convexed ring shown in Fig. 12 after the sides of the grooves have been swaged into Contact. Fig. 14 is an enlarged sectional view illustrating the closure of the groove. Fig. 15 is a diametrical sectional view of a flat band-ring formed by die action from the convex ring illustrated in Figs. 13

5o and 14. Fig. 16 shows in diametrical section -plates longer than theinterior tube of' base metal and extending parallel with each other. Fig. 17y is the same as Fig. 16, except that it shows the edges of theouter and inner gold plates as turned inwardly.

In the drawings, Figs. 5 and 11 to 17, inclusive, are much enlarged in order to show more Clearly the construction of my improved ring.

My invention is a jewelers finding for the manufacture of a filled gold ring; and it consists of the combination of a tube of base metal having an annular V-shaped groove in each of its ends, a tube of precious metal on the outside of the base-metal tube'and united thereto, and a tube ofprecious metal on the inside of the base-metal tube and united thereto, both ofy said tubes of precious metal vbeing longer than said base-metal tube and projecting beyond its ends.

In the drawings, A is a steel bar on the edges of which on the top are two guideplates B B, held in place by screws, as shown.

`C is a gage-plate having a slot at one end and a'h'alf-round seat at the other end. The gage-plate C is mounted upon the top of the bar A and is movable thereon, so that the end which has the half-round seat can be brought to any line of the index D, (on the top of said bar,) and when the gage-plate O has been so adjusted in Aposition it is held in place by means of the thumb-screw E, which passes through'said slot ofthe gage-plate C into the bar A, all-as shown `in Fig. 1.-

The stock from which Inyimproved ring is made `is in the form of a bar F, having a central longitudinal layer of composition or base Inetal, with an outer layer or plate of 'gold on each of the opposite sides of said central layer and unitedthereto, as usual, by solder, one of said gold plates being thicker than the other.

The stock has a half-round forward end, as' seen in top plan in Fig. 1, and is inserted between the guide-plates B B and pushed along upon the bar A until said half-round forward end is seated in the concavity of the gageplate O. To determine the precise length of the blank or section to be out from said strip IOO of stock, the inner edge ot the gage-plate C is moved to the proper line on the index D and is held in such position by the thumbscrew E. A plunger (not shown) descends with power vertically upon said strip of stock and cuts ott a ring-blank G, forming the inner end ot the blank G in a half-round shape and at the same time forming the forward end ofthe strip of stock in a half-round shape, as illustrated in Fig. 1, the openings a a in said figure indicating Where the said plunger has operated and removed portions of the stock. The ring-blank G so formed and cut oit is shown in top plan in Fig. 2 and in side elevation in Fig. 3, in the latter of which the blank is seen to be made up of a central strip or layer b of base metal or composition, the upper layer c ot' gold plate and the lower layer d ot gold plate thinner, however, than the plate c. This blank G is next operated upon as illustrated in Fig. 4. A draw-plate H has an aperture e throughit, with an upwardly-Haring mouth. This aperture, as seen from above, has a narrow oblong shape, with rounded ends. The ring-blank G is laid centrally upon the draw-plate H,with the thin gold plate d uppermost, the major axis of said oblong blank coinciding with the major axis of said aperture and the minor axis of said blank coinciding with the minor axis of said aperture. A plunger J, moved by power, descends upon the blank G and crowds it down into the aperture c of the draw-plate H until the blank G is sufficiently cupped and drawn thereby and until its bent bottom portion is seated upon the end of the plunger I. The plunger I has its lower end I concentrically enlarged` andthe lower extremity of said end I is firmly held against downward movement or displacement by any suitable means. The plunger I and its end I are centrally, longitudinally, and continuously perforated, as seen at f, Fig. 4, the shape and relative size of said perforations being substantially as shown in Fig. 8. The plunger Iis of a shape and size to fit loosely in the aperture c of the draw-plate II. Then continuing descent and pressure of the plunger .I perforates the bottom of the cupped blank G, removing a piece, (shown at K in Figs. 8 and 9,) which removed piece K so perforated or punched out is forced down into the openingfof the plunger I I and is waste, gradually moved along by the succeeding operations, and passing through said openingf to the floor or into a proper receptacle. The plunger I I is then moved upward, and its upper end forces the drawn blank out through the flaring mouth of the aperture c of the draw-plate H.

The vertical dotted lines in Fig. 5 indicate the poriton of the cupped blank which is removed, constituting the piece K of Figs. 8 and 9. The horizontal dotted line in said figure indicates where said cupped and perforated blank is cut transversely by a saw or other proper tool or instrument. Said Fig. 5 is made on an enlarged scale in order more plainly to show the cupping and drawing ef fect upon the blank caused by the operation illustrated in Fig. t and how the bottom of the cup is disposed of. The punched or perforated blank so produced is shown at G in Figs. G and 7, where it is seen that said blank is oblong in shape, with rounded ends and with a narrow oblong opening g', said opening being caused by the removal of the piece K from the blank G, as already explained. The next operation is to open said oblong aperture by a mandrel or other suitable means into the circular ring form G with the central circular aperture g", as seen in Fig. 10.

In Fig. 11 I show on an enlarged scale the ring after it has been shaped into a true circle, said Fig. 11 being a sectional view on line .fr of Fig. 10. Here is seen the basemetal central portion b, the outer thick layer or covering of gold-plate c, and the inner thin layer or covering of gold-plate d.

The next operation is to form from the ring G" the ring G'", (shown in Fig. 12,) and which constitutes my present invention. It is here seen that an annular V-shaped groove or channel has been formed (by milling or otherwise) in both the ends of the base-metal portion b, as shown at 7L, and that the edges ot the gold plates c and d have been beveled. The outer surface ofthe gold-plate may be convexed, as at c', by turning or in any suitable manner.

In Fig. 16 I show how the base-metal portion b may be cut down, so as to leave the gold plates c and d free from all base metal and extending parallel to each other on both edges of the ring. In Fig. 17 I show how these parallel projecting flanges of the gold plates c and (l may be bent inwardly.

The article hereinbefore described and which constitutes my present invention is a jewelers finding, useful for the manufacture of filled gold-plated rings and for like purposes.

The manner in which these grooVed-edged rings may be made into filled gold-plated rings is shown in Figs. 13, 14, and 15. In Figs. 13 and 14 is illustrated the result of an operation which is preferably done by rolling, (but which may be done by swaging, burnishing, or other suitable methods,) whereby the sides of the V-shaped annular grooves h are brought into contact, so that said sides of the grooves meet in a line h, the filling ot base metal is convexed, as seen at b', and the goldplate c is transversely stretched and still further convexed, as seen at c. In Fig. 15 is illustrated the result of an operation similarly performed, whereby the ring Gi" (shown in Figs. 13 and 14) is formed into a gold-plated filled band-ring, (shown in Fig. 15 as G",) Where it is seen that the gold-plate c" of the ring Giv has been shaped with square corners and the filling of base metal has been changed to a corresponding shape b, the closure of the sides of the grooves h together being indicated by the lines h.

The inward bending of the flanges of the IIO gold plates (illustratedin Fig. 17) is to enable the formation of an inwardly-rolled seam upon each edge of theiinished gold-plated ringwhen the annular channels or grooves are closed and the gold plates c and CZ have been brought into contact and rolled together.

It is evident that bracelets, lockets, watchcases, spoons,and other articles of gold-plated or silver-plated Ware may be formed in like manner from intermediate blank forms consisting (as inthe case of gold-plated fingerrings hereinbefore described) of an interior body portion of base metal cut in the shape of the article and provided with a channel or groove upon each of its edges, a plate of precious metal united thereto on one side of,

said base-metal portion, and a plate of precious metal united to the opposite side of said base-metal portion, said plates extending somewhat beyond the edges of the basemetal portion. The method of giving a continuous plating of precious metal on the edges of such articles, which is hereinbefore described as applied to the manufacture of gold-plated iingerrings, Would be within the scope of my present invention.

The apparatus shown in Fig. l and the method herein described and illustrated in Fig. 4 are not, however, essential to my invention, but are specified simply as the best means known to me to accomplish the result in forming finger-rings but it is evident that Y, equally good results may be obtained by using the stock in the form of a tube, or if other articles than finger-rings are to be. made containing my invention the blanks may be formed by dies or by other well-known means. The essential feature of my invention is the channeling or groovin g of the base-metal portion of the article on the outer edges thereof and the covering of the upper and under surfaces of the base-metal portion with gold or silver plates projecting beyond the edges of the base metal for the purpose of developing said projecting edges of precious metal into the side surfaces of a plated article of manufacture.

As indicated by the dotted line in Fig. 16, the base-metal body portion may be made in two pieces, each having beveled edges, which or channel-,in each of its ends, an outer tubeV of precious. metal united to said base-metal tube on the outer surface of the base-metal tube andhaving beveled edges and an inner tube of precious metal united tothe basemetal tube on the inner surface of the base- `metal tube and havingbeveled edges, substantially as set forth.

2. The improved jewelers finding for ring,

manufacture herein described,l consisting of a tube of base metal having an annular groove or channelfin each of its ends, an outer tube of precious metal united to said base-metal tube on the outer surface of the base-metal tube, an inner tube of precious metal united to said base-metal tube on the innersurface of the base-metal tube each of said tubes of precious metal exceeding the base-metaltube Vin length, substantially as specified;

o. The improved jewelers'iinding for ring manufacture herein described, consisting of a tube of base metal having an annular groove or channel in each of its ends, an outer tube of precious metal united to the base-metal tube on the outer surface of the base-metal tube and having a convexed outery surface and beveled ends and an 'inner tube of pre* cious metal united to the base-metal tube on the inner surface of the base-metal tube andl having beveled ends, substantially as speci-v fied.

In testimony whereof I affix my'signature in presence of two witnesses.

FRANK R. STAFFORD.

Witnesses:

JOSEPH R. BULLooK, Jr., WARREN R. PERCE.