IMPROVEMENTS IN SOLITAIRES, SLEEVE AND OTHER STUDS, AND OTHER LIKE FASTENINGS AND ORNAMENTS
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by Lawrence Jacob and Jacob
Brown at the Office of the Commissioners of Patents, with their
Petition, on the 4th May 1875.
We, LAWRENCE JACOB, of Birmingham, in the County of Warwick,
Manufacturing Jeweller, and JACOB BROWN, of Birmingham aforesaid,
Watch Manufacturer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN SOLITAIRES, SLEEVE AND OTHER STUDS, AND OTHER LIKE
FASTENINGS AND ORNAMENTS," to be as follows :—
Our Invention consists of the construction and combinations of parts
herein-after described of self-acting fastenings for solitaires, sleeve and
other studs, and other like articles.
We will describe our improvements as applied to a solitaire. At the
back face of the body or shell of the solitaire and partly crossing the
said back face a narrow case or slot is made, in which case or slot two
spring sliding bars work, their upper ends being hook or otherwise
shaped, the hooks being turned in opposite directions. Connected with
the said sliding bars are pushers or push pieces which project beyond the
edge of the solitaire for releasing the fastening.

page_text: By means of springs acting either on the push pieces or directly on
the bars, the hooked upper ends of the said bars are separated from one
another, and when so separated or expanded they form a cross bar to the
solitaire. By pressing on the push pieces in opposite directions the two bars
are closed or pressed together, and when so pressed together they may be
readily passed through the holes in the sleeve or dress. By then
removing the pressure from the push pieces of the sliding bars the
latter take their expanded position, and by crossing the holes in the
sleeve or dress fasten the solitaire to the said sleeve or dress.
To unfasten the solitaire it is only necessary to compress the cross bars
together by pressure on the push pieces when they may be withdrawn
through the holes in the sleeve or dress. Or the unfastening of the
solitaire may be effected by pushing or turning some other part of the
solitaire. Or instead of making the cross bars move in a rectilinear
direction for fastening and unfastening the solitaire, the said bars may
be made of a curved or semicircular figure, and have a curvilinear
motion given to them. In this arrangement the curved bars which may
either be rigid or elastic work around circular blocks in the body of the
solitaire, their upper ends being turned in opposite directions. The said
upper ends of the curved bars pass through a slot between the blocks,
and in the middle of the back face of the solitaire.
By means of a bow spring, or coiled or other springs, the curved bars
described are raised through the slot in the middle of the solitaire, and
their ends are made to cross the said solitaire.
By the action of pushers at the edge of the solitaire, or by a knob or
an ornamental piece at the front of the solitaire, the curved bars may be
partly withdrawn into their slot, and when so withdrawn the ends of the
bars may be introduced into the holes in the sleeve. By removing the
pressure from the pushers or knob described, the curved bars take their
'expanded position and fasten the solitaire to the sleeve.
Instead of curved blocks for the bars to work upon, the said bars may
work upon guiding pins. The same result may be obtained by making
the cross bars in the form of two jointed plates pressed open by springs,
the said plates working in a flat case or slot at the back of the solitaire.
By depressing the jointed plates or bars in their case they are closed,
and in this position are passed through the holes in the sleeve. By
raising the said jointed plates in their case or slot the said plates open

page_text: out, and by crossing the holes in the sleeve fasten the solitaire thereto,
the open plates lying parallel with the back of the solitaire. Or instead
of making the jointed bars move in a vertical plane for fastening and
unfastening the solitaire they may be made to move in a horizontal_
plane, the bars being jointed together at their middle and crossing one
another after the manner of a pair of forceps: When the jointed bars
are closed they constitute virtually one bar, and when opened out by
means of springs they cross the holes in the sleeve and fasten the solitaire
to the said sleeve.
The closing of the hinged or jointed plates and bars for the purpose
of releasing the fastening may either be effected by the action of
pushers at the edge of the solitaire, or by means of a head or ornamental
part which is turned, pushed, or twisted at the front of the solitaire.
We apply our improvements to sleeve and other studs, and other like
articles, such as buttons, and bars for chains, substantially in the manner
described with respect to a solitaire.