US1442240A - Method of forming rings - Google Patents

Description

.l. H. STONE.

METHOD OF FORMING RINGS.

FILED NOV.23, 1918.

Jan. 16, 1923. 1,442,240.

Patented Jan. 16, 1923.

U ED STATES H. -ST01\TE,OF CRANSTON, RHODEISLAND.

' g I mn'rrron orroniurne nines.

Application filed November 23', 1918. "Seria1'I T0 m y I e To allwhomz't'may 00mm:

I Be it known that I, JOHN H. vSuro'rrn, a citizen of the United States, and resident of Edgewood, city of Cranston, in'the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Methods of Forming Rings, of which the following is a specification.

This invention relates to. rings more particularly designed, for personal wear, and has for its object to provide an improved construction of a so-called shell form of ring; also an improved method by which such a ring is formed, the ring being made of two continuous bands of very thin stock, one of which is trough-shape on its inner surface and both of which are connected together, thereby forming a ring that is strong and durable and that is made of precious metal and of the very minimum amount of stock.

With these and other objects in view, the invention consists of'certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1is a side elevation showing a ring of my improved. construction.

Figure 2--is a perspective view of a piece of tubing from which the outer band of my improved ring is formed.

Figure 3is a perspective view showing a section cut from the tube from which my outer band is formed.

Figure 4shows the outer band as bent or shaped into a concave-convex form.

Figure 5'shows a plurality of these outer concavo-convex bands mounted upon a tube and spaced apart at intervals along the same.

Figure 6is a sectional view showing the edges of the outer band as secured to those of the inner band thus forming a shell ring or one in which the ring band is hollow.

Figure 7-is a sectional view illustrating a set of bending dies in open position, employed for shaping the outer ring band into concavo-convex form, the die being shown open with the band positioned therein ready to be shaped when the dies are forced together.

Figure 8shows the dies as having been closed and the band as bent into the de-' sired form by the closing action of these dies.

' R 'eferring to the drawings, 10' designates a seamless tube of precious metal, whichis drawn up from'aflisk intojanelongated I thimble 'o f thereduired' diameter? I next cut by a saw, or'otherwis'e, a narrow-band member 11 from this" tube and place this band between thetw o dies 12 and'13 which are hollowed out preferably-as at 14 and 15 into the shape in which this band member is designed to be pressed, as illustrated in Figure 8. These dies are then forced tof', I gether into the position illustrated in'Fig- I 3 ure 9, causing the band to take the shape of the cavity in the die.

of an oval shapeas at 16 or concavo-convex in cross section, but the band may be shaped on its outerside into any, desired form, to produce rings of difierent styles,

I have shown theband thus formed to'be The next operation is to draw up another tube or thimble 17 from a disk of precious metal. ing considerably smaller than that of the first tube. The inner diameter of the tube from which the inner bands are constructed is of the size designed to determine the rated size of .the ring and its outer diameter is justsufiicient to fit inside of the-inner edges of the outer concavo-convex bandlfi previously formed. I then slip a plurality of The diameter of this second tube bev This burnishing of serves to completely cover the seam, renderin% it quite invisible.

y this construction the two different bands 16 and 18 of the ring may be formed of precious metal of but a few thousandths of an inch in thickness or about the thickness. of an ordinary sheet of writing paper, and v by shaping the outer band in an oval form and permanently securing it to the inner band the whole is madeextremely stiff and strong. A ring so formed is very durable and at the same time is extremely light in weight and while it may be properly sold for 1 an all-gold ring yet it possesses the very minimum amount of preciousmetal. Then again both of the members of the ring are continuous, unsoldered bands and the ring is formed without transverse seams.

formed partly of base metal of the old construction.

Having thus described one illustrative einbodiment of my invention and the best mode known to me for carrying :out my method, I desire it to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for the purpose of limitation, ,the scope of the invention being defined and limited only .by the terms of the appended claim.

I claim: The method of forming a hollow ring band which consists in cutting a band from a tube applying an edgewajys pressure upon this band by a torrnlng die bendlng it into con cave shape in cross section, securing {1, plurality of these bands at spaced apart inter vals upon atu'be then severing the tube at the edges of the outer band and finishing the edges.

' In testimony whereof I afiix my signature in presence of one Witness. p

3 JOHN H. STONE; Witness:

HOWARD E. ,BAnLoW.

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