Improvements in the Mounting of Stones for Ornaments.
Year: 1895

page_text: Date of Application, 26th Aug., 1895-Accepted, 28th Sept., 1895
COMPLETE SPECIFICATION.
Improvements in the Mounting of Stones for Ornaments.
A communication by ALBERT WITZEL, of 45 Wilhelmstrasse, Ludwigsburg,
Wurtemburg, in the Empire of Germany, Jewellery Manufacturer.
1, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street Liverpool and 6, Bank Street, Manchester,
both in the County of Lancaster, 118 New Street, Birmingham in the County of
Warwick and 31 High Holborn in the County of Middlesex, Civil Engineer, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement :-
This invention has for its object an improved mounting for precious stones or the
like, in which a conically expanding holder is let into the stone, which latter is
softened by heating, whereby the stone on cooling is held extremely firmly.
A disc having a number of arms bent up in a zig-zag form is pressed into this
holder or mount, said disc carrying on the free ends of the arms a small metal
plate which is fixed on the disc by its edges being bent down. On the insertion of
the metal plate into the holder carrying the stone, the bent up arms of the disc are
pressed into the conical expanded part of the holder by both parts being strongly
pressed together, and by this means the stone and the metal plate are extremely
securely held together.
In the accompanying drawings,
Figures 1 and 6 are cross sectional views of the stone and holder;
Figure 2, a plan view; and
Figure 7, a view from below of the same, whilst
Figures 3, 4, 5, 8, 9, 10, are details.
The conical holder or sheath C is pressed into the stone which is softened by
heating, in such a way that the open edge somewhat projects. Three small slots
or indentations c of the same width as arms d of a disc D are provided in this
projecting edge and correspond to the number of the arms of the disc D which is
afterwards inserted in this holder. The disc D is retained in a slightly dished
round metal plate B by the edge of the latter being bent over the ends of the
arms d of the disc D. In order then that when the stone A or its holder C and
the plate B or rather the arm disc D are fitted together by the stone A and the
holder D being pressed together, the arms d of the disc D may be forced to enter
the conical extension of the holder C. A small disc e is arranged between the
arms d on the plate B and bears against the arms d in such a way that the said
arms lie exactly between the edge of the holder C and the cover or casing of the
disc e and therefore cannot shift in any direction. The disc D is then pressed into
the holder C against the bottom thereof and its arms & rest in the extension of the
In
widened holder C which is conical in shape or inclined towards the interior.
order that the plate B and the holder C shall not turn, the arms d of the arm
disc D are placed in notches c of the conical holder C when the stone A and the
plate B are put together.
If one or more loop pieces b', Figures 6 and 7, be formed in the plate B by
a partial stamping out, the stone together with its mounting may be directly
attached to the ornament frame by means of these loops and wire or the like.