Improvements in the Manufacture of Plated Rings for Jewellery.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Plated Rings for Jewellery.
I, GEORGE HERBERT KNIGHT, of 14 Fountain Street Providence, in the State of
Rhode Island, United States of America, mechanic, do hereby declare the nature of
my invention for "IMPROVEMENTS IN THE MANUFACTURE OF PLATED RINGS FOR
JEWELLERY," and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My invention consists in an ornamental ring which may be formed either from a
single seamless tube, having outer and inner plated surfaces, or from two or more
concentrically arranged seamless tubes, the outer tube being provided with an outer
plated surface, and the inner tube with an inner plated surface, and having rounded
or angular thickened edges formed by an outwardly turned thinned portion or flange,
which carries the inner plating outwardly, and back against the surface of the outer
plating, over the edge of the ring, and conceals the base metal between the inner and
outer plated surfaces.
In the accompanying drawings
Fig. 1, represents an end view and an axial section of a seamless tube provided
with inner and outer plated surfaces.
Fig. 2, represents the same with a portion of the outer surface cut away to form a
thinned end or flange for turning outwardly and back against the outer surface to
form the thickened edge of the ring.
Figs. 3 and 4 are axial sections which show the thinned flanges when turned out-
wardly and back, so that the plating of the flanges, which was a portion of the inner
plating of the tube, will rest against the plated outer surface.
Fig. 5, is an axial section, and shows the ring when provided with thickened
edges which have been flattened to angular form from the rounded hollow edges
shown in Fig. 3.
Fig. 6, represents an end view, and an axial section of a tube formed of concentric
seamless tubes, the outer tube being provided with plating upon its outer surface and
the inner tube upon its inner surface.
Fig. 1, represents a seamless tube, which is provided with an outer plated surface a,
and an inner plated surface a¹ and which may be readily formed from rolled plated
sheet metal by first drawing up a cup of the proper diameter in suitable dies and then
removing the bottom of the cup so formed.
In manufacturing my improved plated ring from the plated seamless tube A, I first
remove a portion of the outer surface of the tube at each end, so as to form the
thinned portions of annular flanges c, c, as shown in Fig. 2, and then turn over the
said thinned portions or flanges, outwardly and backward by means of dies provided
with a suitable annular groove, until the plating a¹ of the flange c, strikes against the
plating a of the outer surface of the tube; thus forming a jointless ring having a
practically continuous plated surface, with the rounded hollow edges d, d, as shown
in Figs. 3 and 4, which edges may be flattened to an angular form as shown in Fig. 5,
either by the process of rolling, or burnishing.
The tube A, may be formed of two or more concentric seamless tubes, as shown in
Fig. 6, in which the outer tube b is a seamless tube having an outer plated surface a,
and the inner tube 62 a seamless tube having an inner plated surface a', with an inter-
mediate unplated tube 6. And in this case the end portions of one or both of the
tubes 6 and b¹ may be cut away, either for the whole, or a part of their thickness,
to form the thinned ends or flanges for turning outwardly and backward as
desired.

page_text: Having now particularly described and ascertained the nature of my said
invention, and the manner the same is to be performed, I declare that what I
claim is :
1. A jointless ring, having 'plated inner and outer surfaces, and having thickened
edges formed by an outwardly turned thinned portion or flange, which carries the
inner plating outwardly, and back against the surface of the outer plating, over the
edge of the ring, and conceals the base-metal, substantially as described.
2. A jointless ring, having plated inner and outer surfaces, and having angular
thickened edges formed by an outwardly turned thinned portion or flange, which
carries the inner plating outwardly, and back against the surface of the outer plating,
over the edge of the ring, and conceals the base-metal, substantially as described.
Dated this Twenty ninth day of March 1889.
GEORGE HERBERT KNIGHT.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.