US110587A - Improvement in finger-rings - Google Patents

Description

tluitrtl gantes @met @imite Letters Patent No. 110,587, dated December 27, 1870.-

IMPROVEMENT IN FINGER-RINGS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it'known that I, JOHN S. PALMER, of the city and county of Providence, in the State of Rhode Island, have invented certain ynew and useful Improvements in Finger-Rings.

My invention relates particularly to that class of nger-rings which is 'made of any suitable base sheet metal, plated and rolled with precious metals on both surfaces, and consists in uniting the two edges of the precious metal at a point where -contact between the joint and. the finger is not liable to occur; and I do hereby declare that the following spec-- ification, taken in connection with the drawing furnished and forming apart of the same, is a clear, true, and exact description thereof.

IFigure l represent-s a ingerring constructed under iny improvement.

Figure 2 represents a plate direct from the die, in which the body of the ring is formed, and exhibits the rim of waste metal.

Figure 3 represents the body of the ring with the waste 'metal detached.

Figure 4 represents a stone-bearing` embossmeut, to be attached tothe exterior of the body of the ring.

Figures 5 and G represent cross-sections of the body of the ring, as shown in igs. 2 and 3.

Figure 7 represents the perfect ring, fig. l, with a port-ion of its side cut away. l

Figure S represents a ring in section, like fig. 7,

manufactured of the same kind of metal, in the inauner heretofore practiced.

Figure 9 represents a ring in section, like figs. 7 and 8, manufactured of rolled sheet metal struck up inea die, filled with soft solder or other similar metal, and then lined with single rolled plate.

Iersons skilled in the art are well aware that botl singleland double plate have been used in the manufacture of finger rings.

This pla-te is composed of a sheet of base metal,

l having one or both of its surfaces plated with a layer of precious metai,and all rolled down together tothe n desired thickness.

If made of a single plate, the body of the ring is .struck up in a die, inthe form of a concave shell, the

interior of which isi'illed with soft solder or other metal, as may be desired. Fig. 9 represents, in section, av ring of this character.

In section, the gold surface extends from the inner periphery of one side of the ring across its outside, to the inner periphery ot" the other, side. These edges are indicated in fig'. 9 as a a. 'lhe lining D, also of single plate, is then slipped into the ring, and the edges a a are soldered thereto;

A female die and a face-plate, for instance, may be used, forming a blank like fig. 2, from which the waste metal i's trimmed or cut, as shown 1n tig. 3.

vThe cut portion or edge is then carefully burnished,

and the two gold edges thereby united as far as praeticable. v

Up to this point there is nothing in the mode of manufacture described which constitutes any portion of my invention. Y

The rings are then formed upon an arbor, and the circular point of connection is made by soldering in the well-known manner.

Heretofore the points a a, as shown in the several figures, have been brought into contact with the arbor, bringing, as will b e observed in figs. 8 and 9, the points of Contact between the upper andvlower or inner and outer gold surfaces, -as indicated by the letters a a at ,the inner edge or periphery of the ring. l Y

My invention consists in so forming the ring,lfron1 the metal prepared as described, that the points of contact a a, iig. 7, between the inner and outer gold surfaces, shall be at the outer periphery of the ring.

Persons skilled in the art are well aware that joints made in either of the modes described cannot be made so perfect that the baser metal will be entirely protected or covered. Y

. If other 'than gold solder be used, that which will be left uponthe surface to a greater' or lesser extent will be liable to corrodc or oxidize.

In either case the base metal exposed will oxidize from const-ant contact with the skin and the eorro` sive action of perspiration, and to a greater or lesser extent poison or discolor the finger. The junction of the metal becomes also marked and open, or otherwise dislignred.

A ring constructed under my improvement, with the connecting-joint between -the edges of the precious nietalat the outer periphery, as described, is

free from these objections, as an -unbroken continuous surface of gold is brought in contact with the nger while the ring is being worn.

A ring, constructed as described by me, is also less liable to cut the finger, as the sides ot the'ring are beveled outwardly, leaving the inner periphery with edges less clearly defined than the outer.

My invention is also applicable to the manufacture l of band-bracelets, as will be readily' understood by persons skilled in the art.

Having thus described my invention,

I claim as .new and desire to secure by Letters Patent-- 1. That improvement in the manufacture of plated met-al nger-ringsand bands, which consists in uniting the inner and outer gold surfaces at a point remote from their inner peripheries, substantially as and for the purposes speoiiied.

2. As a new article of manufacture, the fingerring herein described, made 0f base metal 'plated with precious metal, and having its inn'erandA outer plated surfaces connected at the outer periphery of the ring.

JOHN S;l PALMER.

Witnesses:

EBEN W. WATERHoUsE, GEORGE -N. OABRON.

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