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 a plated ring formed from a seamless tube having a rolled
plated surface, by turning the end portions of the tube either inwardly or out-
wardly and backward, so that the ends thereof will be close to each other and rest
either upon the inner or outer surface of the tube, and the plated surfaces of the end
portions will meet thus enabling me to produce from a piece of sheet metal having a
rolled plated surface on one side, a continuous ring, without joint, and having a
practically continuous rolled plated inner and outer surface.
In the accompanying drawings
Fig. 1, represents an end view of a tube made without a joining seam, and plated
upon the inner surface.
Fig. 2; represents a longitudinal section of the said tube.
Fig. 3, represents a longitudinal section of a similar tube provided with plating
upon its outer surface.
.
Fig. 4, represents a tube provided with an inner plated surface as shown in Figs. 1
and 2, and having its end portions turned outwardly and backward until the turned
ends are close to each other, thus forining a continuous hollow ring from the
seamless tube.
Fig. 5, represents a tube provided with an outer plated surface as shown in Fig. 3,
and having its end portions turned inwardly, and backward, until the turned ends
are close to each other..
Fig. 6, represents a section of the continuous hollow ring, shown in Fig. 4, when
reduced in thickness or flattened, so that the outwardly turned end portions of the
original tube are flattened to the surface of the middle portion, with the plating at
the ends turned inwardly to the said surface.
Fig. 7, represents a section of the continuous hollow ring shown in Fig. 4, when
reduced in thickness or flattened, and having the end portions of the tube made to
rest end to end, upon the middle portion.
Fig. 8, represents the continuous hollow ring shown in Fig. 5, when reduced in
thickness or flattened, so that the inwardly turned end portions of the original tube
are flattened to the surface of the middle portion, with the plating at the ends turned
to the said surface.
Fig. 9, represents a longitudinal section of one side of a tube formed of two
seamless tubes, one within the other, the inner tube being provided with a plated
surface.
Fig. 10, represents the longitudinal section of one side of a tube formed of two
seamless tubes, the outer tube being provided with a plated surface.
Fig. 11, represents a longitudinal section of a seamless tube plated upon its inner
surface, as shown in Figs. 1 and 2, and having its end portions made thinner to
facilitate the outward and backward turning of the ends, and the subsequent flattening
of the end portions upon the middle portion.
Fig. 12, represents a longitudinal section of the double seamless tube plated upon
its outer surface, as shown in Fig. 9, and having its end portions reduced in thickness
from the inner side by the entire removal of a portion of the inner tube at each end,
to facilitate the inward and backward turning of the ends of the plated outer tube,
and the subsequent flattening of the said end portions upon the remaining middle
portion of the inner tube.

page_text: Fig. 13, represents a section of the inner tube as shown in Fig. 12, when the end
portions of the outer tube have been turned inwardly and backward, until the turned
ends are close to each other.
Fig. 14, represents a section of the continuous hollow ring as shown in Fig. 13,
when flattened so that the end portions of the outer tube rest end to end, upon the
inner surface of the inner tube.
Fig. 15, represents a section of the ring which would be formed from the solid
tube with the thinned end portions shown in Fig. 11, when the said end portions have
been turned outwardly and back, to meet end to end upon the outer surface of the
middle thicker portion of the tube.
A, Fig. 1, represents a seamless tube which may be provided either with a plated
inner surface a, Figs. 1, and 2, or with an outer plated surface a', Fig. 3, the said
tube being 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 forming my improved ring from a seamless tube A having an interior plated
surface a, as shown in Figs. 1 and 2; I turn the end portions b, b, of the tube, out-
wardly, by means of dies having an annular groove, until the turned ends of the
said end portions are brought close to each other, as shown in Fig. 4. The jointless
hollow ring so formed can then be compressed between suitably formed rolls or by
forcing the same into suitable dies, whereby the backwardly turned end portions b, b,
will be flattened down to the surface of the middle portion c, and the plating at the
meeting ends of the said end portions will be turned inwardly, with the meeting
surfaces in close contact as shown in Fig. 6, thus forming a band ring which having
a practically continuous plated surface can be made to stand the test, of dipping in
acid, and have the appearance of a solid gold band ring.
By a slight variation in the degree of turn given to the end portions b, b, the said "
end portions can be flattened down so as to rest, end to end, upon the surface of the
middle portion c, as shown in Fig. 7; and in this case the plating a of the interior at
one end of the tube, will be carried over to meet the turned plating of the opposite
end of the tube, edge to edge.
Instead of turning the end portions outwardly, the end portions b, b, of the tube
shown in Fig. 3, may be turned inwardly and backward until the turned ends of the
end portions are brought close to each other, as shown in Fig. 5. The jointless
hollow ring so formed can then be compressed between suitably formed rolls, or by
forcing the same into suitable dies whereby the inwardly turned end portions will be
flattened down to the middle portion e and the plating at the meeting ends of the
end portions will be turned outwardly in close contact as shown in Fig. 8, thus forming
an inwardly turned jointless plated band ring having a practically continuous plated
surface.
In making a thick band ring, I prefer to employ a comparatively thick tube A, and
thin the end portions of the tube by cutting away a portion of the base metal side
at each end for a little more than one-quarter of the length of the tube, thus leaving
the middle portion c thicker than the thinned end portions b, b, as shown in Fig. 11,
and in some cases the ends of the thinned portions b, b, may be slightly beveled so as
to form an acute angle with the plated surface. The band ring formed from the
tube A, when thinned from the outer side, and having an inner plated surface a, as
shown in Fig. 11, is shown in Fig. 15, the thinned end portions b, b, having been
turned outwardly and backward, and then flattened down to the surface of the thicker
middle portion c, with the plating a of the inner surface at one end of the tube,
carried over to meet the turned plating of the opposite end of the tube, edge to edge;
or by shortening the length of the thicker portion c, the plating a may be made to
turn inward to the original outer surface of the tube as shown in Fig. 6.
In order to facilitate the manufacture of the desired thick tube, and to provide for a
uniform thickness in the plated thinned end portions b, b, I prefer to employ a tube A',
made of two seamless tubes d and e, one within the other; the tube d being provided
either with an inner plated surface a, or an outer plated surface a', according to its

page_text: position relatively to the tube e, as shown in Figs. 9 and 10, and in this case I cut
away the opposite ends of the unplated tube e for a little more than one quarter of the
length of the tube, leaving the middle portion e¹, a little less than one half the original
length of the tube as shown in Fig. 12. The ends of the tube d may also be slightly
beveled so as to form an acute angle with the plated outer surface of the said tube.
And in forming a band ring from the tube A¹ shown in Fig. 12, I turn the end
portions b, b, of the tube d, inwardly and backward, as shown in Fig. 13 and then flatten
the jointless hollow ring so formed, so that the turned end portions will be flattened
down to the inner surface of the tube el with the plating a¹ of the outer surface of
the tube d, carried over one edge of the ring to meet the turned plating carried over
the opposite edge of the same; and by shortening the length of the tube e¹ the plating
of the end portions b, b, will be made to meet and continue, in contact, to the unplated
inner surface of the tube, as is shown in Fig. 8.
A high grade of solder can, if desired, be employed to more firmly connect the
meeting ends of the tube preparatory to the final finishing of the ring.
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 plated ornamental ring formed from a plated seamless tube, and having the
end portions of the tube turned backward to meet each other, and rest upon the
middle portion, substantially as described.
2. A plated ornamental ring formned from a plated seamless tube, and having the
end portions of the tube turned backward to meet each other, and rest upon the
middle portion, with the plating of the end portion turned to the middle portion,
substantially as described.
Dated his T
L
Ր - Լ 1000
GEORGE HERBERT KNIGHT.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.