AN IMPROVEMENT IN BROOCHES."
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by the said Walter William Tambs
at the Office of the Commissioners of Patents on the 13th February 1880.
WALTER WILLIAM TAMBS, of Birmingham, Jeweller. AN IMPROVEMENT IN
BROOCHES."
This Invention relates to a certain improvement in brooches with the objects of
dispensing with the rivet-hinge of the pin, which is so liable to get out of order,
and of facilitating the placing and removal of the fastenings and of rendering them
more secure when in position. The improvement may also be applied to other
dress fastenings in which security is desirable.
In lieu of attaching the pin to the brooch by a rivetted hinge, as is usually done,
I form it with a knob or ball-shaped end, and insert it with a certain freedom of
movement into a projecting socket, forming part of or carried by a sliding piece
arranged inside the back-plate of the brooch, and the position of which is controlled
so as to cause the point of the pin to bo constantly pressed into or towards a tubular
or other shield carried by the outer side of the said back-plate opposite to the said
projecting socket, by means of a spring encircling it or otherwise arranged, tho
spring having bearings between a guide for the sliding piece carried by the back-
plate and shoulders formed on the sliding piece, the sliding piece being also guided
by a projection, which passes through a slot formed in the back-plate.
The sliding piece may be arranged either so as to be pushed or withdrawn in
securing or relieving the pin in uniting it with or releasing it from a garment.
I also propose to fix a spring at or near the head of the shield, so that with
slight pressure upon the point of the pin it shall be caused to fall below the spring
into the shield to prevent clandestine removal.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Walter William Tambs in the Great Seal Patent Office on the
12th August 1880.
WALTER WILLIAM TAMBS, of Birmingham, Jeweller. "AN IMPROVEMENT IN
BROOCHES."
This Invention relates to certain improvements in brooches with the objects of
dispensing with the usual rivet-hinge of the pin, which is so liablo to get out of
order, and of facilitating the placing and removal of such fastenings aud of rendering
them more secure when in position. The improvements may also be applied to
other dress fastenings in which more than the usual security is desirable.
In lieu of attaching the pin to the brooch by a rivetted hinge, as is usually done,
I form it, as illustrated on the accompanying Sheet of explanatory Drawings, with
a knob or ball-shaped end 1, as shown in Figure 1, which I insert with a certain
freedom of moveinent into a projecting socket 2, as shewn in Figures 2 and 3, forming
part of or carried by a sliding-piece 3 arranged inside the back plate 4 of the
brooch, and the position of which is controlled, so as to cause the pointed end of
the pin 5 to be constantly pressed into or towards a tubular or other shield 6
carried by the outer side of the back-plate 4, as shown in Figure 3, opposite to the
socket 2 by means of a spring 7 encircling it, or otherwise arranged so as to
operate thereon, the spring having bearings between a guide 8 for the sliding picce
carried by the inside of the back plate 4, as shown in Figure 4, and shoulders
formed on the sliding-piece, as shewn in Figure 2, the sliding piece being also guided
by a projecting part 9, which passes through a slot 10 formed in the back plate, as
shown in Figures 3 and 4.
Figure 5 represents a back view of a shell, which forms the centre of Figure 7, its
front having an ornamental pattern or device; Figure C is a rim or border, which
receives and retains the shell, Figure 5; and Figure 7, a front view of the finished
bronch
Having now described the nature and objects of my said Invention, together
with the manner in which the same is to be or may be performed or carried into
practical effect, I would remark in conclusion that I claim as iny. Invention,
Constructing the pin or equivalent fastening detail of brooches and other similar
dress-fastenings with a ball-joint in socketted connection with a sliding piece, and
in combination with a fixed shield adapted for receiving the point of the pin,
substantially as hereinbefore described and as illustrated on the accompanying
Sheet of Drawings.
In witness whereof, I, the said Walter William Tambs, have hereunto set
my hand and seal, this 29th day of July, in the year of our Lord One
thousand eight hundred and eighty.
Witness,
JOHN KENDRICK.
WALTER WILLIAM TAMBS. (L.S.)