Improvements in Joints and Tongues for Brooches and such like Articles.
Year: 1886

page_text: Date of Application, 25th Sept., 1886.
Complete Left, 27th June, 1887.
Complete Accepted, 29th July, 1887.
PROVISIONAL SPECIFICATION.
毀
Improvements in Joints and Tongues for Brooches
and such like Articles.
'
London S.E. Inventor and
1, HERBERT DALGETY of 259 Barry Road
Manufacturer do hereby declare the nature of my Invention to be as follows :-
I bend a piece of sheet metal up to resemble a joint before the centre part has been
cut out, and enclose it in steel dies, inserting steel wires a little way up each end of
the joint, but leaving the centre part, (which is to be pressed down) free of them, I
now shear the centre part down and press it flat which locks, and holds the joint
together, thereby doing without solder, and leaving a space for the Tongue to work
between.
I can make various uses of the centre part of the joint, (which hitherto has been
entirely cut out and done away with) such as, instead of pressing the centre part
down, as described above, I can press it all to one side of the joint, which will form a
stop for the Tongue, or by pressing the centre part down under the joint, it will form
a peg or plate suitable, for joints fixed to articles by cementing, also Í can treat a
portion of the ends of the joint in the same ways as described for the centre part.
I will now describe the Tongue which works in the gap of the joint above.
I fold a piece of sheet metal with a steel wire between, pressing the sides together,
and making two or more holes through the flat part, all of which I will call the
knuckle piece, I now crank one end, and point the other, of a pin or stem, so that by
threading the pointed end through the hole furthest from the knuckle end of the
knuckle piece, and cranking that same end close to the hole, will bring the cranked
end of the pin or stem through the other hole in the knuckle, and by rivetting or

page_text: compressing, it will completely fasten the knuckle piece and the pin or stem together,
thus forming a Tongue, by cranking a longer portion of the stem and fixing it
through the knuckle, it will form a stop for the Tongue, thereby allowing these
Tongues to be made with, or without, stops as desired, or instead of cranking the
knuckle and the stem, I can punch the stems out of sheet metal, leaving projections
at the side near one end to rivet through the holes in the knuckle, and rounding the
rest of the stem and pointing the end, these also can be made with, or without, stops
by leaving one projection long enough to come through and form the stop. These
Joints and Tongues can be made all sizes and in all kinds of metals.
Dated this Twenty fifth Day of September 1886.

page_text: and such like Articles.
HERBERT DALGETY 259 Barry Road East Dulwich Surrey 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 :-
The object of this Invention is to construct Joints & Tongues for Brooches &
such like Articles in a simple and durable manner without the use of solder, rivets or
the like, & to utilize that part of a Joint (which hitherto has been cut out & cast
aside) for the following purposes viz. To form a locking for Joints. To form a stop
for putting Spring on the Tongue & to form pegs & plates on the underside of
Joints, all of which, I will now proceed to describe by the aid of the drawings.
Fig. 1 is a piece of Sheet Metal folded to the shape of an ordinary Joint.
Fig. 14 being the longitudinal view of same, the central portion B', between the dotted
lines, is the part which has hitherto been taken right out to allow the knuckle part of
the Tongue to work in, but which I press into various shapes & positions as will be
understood by the following description. Figs. 2 & 2ª are sectional & longitudinal
views of a Joint locked together by means of the centre piece B¹. Fig. 14 being
pressed down on to the base plate A. As in Fig. 24 & plan view Fig. 6.
Figs. 3 3 & 11 shew the centre part B¹ Fig. 1A driven over to one side to form a
stop for the Tongue. Figs. 4 4 & 18 shew B¹ Fig. 14 folded together beneath
the base plate A to form a flat plate, as sometimes used by pinning in Bog Oak &
Ivory Brooches &c. Figs. 5 5 & 12 shew portions of the centre piece B¹ Fig. 1ª
folded down as in Figs. 4 4ª but with the pieces twisted to form pegs for cementing
to Brooches.
The reader having become thoroughly acquainted with the principles on which these
Joints are constructed as shewn in the above Figures and description, will understand
that different kinds of Joints may be made by merely interchanging and reversing
the positions of the lockings, stops & pegs &c. which I will proceed to give a short
description of Fig. 7 is a locked Joint with the lockings placed out of centre to better
take the bearing of the Tongue stop. Fig. 8 has the centre part between the
knuckles B B entirely cut out & done away with & fastened together with the
lockings at B. Fig. 9 is a stop Joint, B' the stop, & the locking at B' Fig. 10.
The same kind of Joint as Fig. 9 but with the lockings placed at B³ Fig. 12 Pegs
are provided to this Joint at B' beneath the base plate A. Fig. 13 similar to
Fig. 12 with the addition of the central locking B¹. Fig. 14 similar to Fig. 7 with
the addition of the Pegs B³ Fig. 15. This is provided with twisted pegs only, at B³,
the centre part between B B being entirely cut out & done away with. Fig. 16.
is a stop Joint with two central pegs at B3, B¹ being the stop Fig. 17. This also is
a stop Joint with twisted pegs at B & the stop at B₁ Fig. 18 In this the whole
of the centre part between the knuckles B B is pressed down to form a plate as in
Figs. 4 & 4. Fig. 19 The same kind of Joint as Fig. 18 with the addition of the
lockings R

page_text: The base plates A of the above described Joint may be of any shape & may be
continued longer & terminate in a catch as in Fig. 20. Fig. 20ª shews the catch
bent up & the Pegs C. pressed down & twisted, for some Brooches the Pegs in
this would not be required.
I will now describe the Tongue (which works in the Joint described above), and
which is composed of two parts, a knuckle piece Fig. 21, is a piece of sheet metal
folded together & a stem or pin A pointed at one end & cranked round at the
other as in Fig. 22 which shews the pin or stem inserted in one hole ready to be
brought into the positions shown in Figs. 22 & 22B after which the projecting end
of the stem A' is pressed out of its original form to prevent its returning through the
hole, & which is allowed to project so as to form a stop for the Tongue, where no
stop is required to the Tongue the end of the stem is left shorter & riveted over as
in Fig. 22. Another method of making these Tongues but using the same kind of
knuckle piece, is, to punch the stems out of sheet metal, (as in Figs. 23 & 234) &
after rounding the edges & pointing the end, to place the projections D & E in
the holes A & B in the knuckle piece & rivet them over as in Fig. 24, the stem
with the long projection in Fig. 23 being for those joints requiring a stop.
I do not confine myself to the precise details herein given & set forth & shewn
on the accompanying sheet of drawings but that I hold myself at liberty to alter or
modify the same without departing essentially from this my said Invention.
Having now particularly described & ascertained the nature of this my said
Invention & in what manner the saune is to be performed, I declare that what I
claim is
1st. In a Joint, the retaining & utalizing the portion B¹ of Fig. 1ª substantially
as & for the purposes herein set forth.
2nd. A perfectly secure "Solderless" Joint formed out of one piece of sheet
metal & locked together as in Figs. 2, 24, 5, 5ª, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16,
17, & 19, substantially as & for the purposes herein set forth.
3rd. The construction of the knuckle piece Fig. 21 provided with holes A & B.
substantially as & for the purposes herein set forth.
4th. The construction of the knuckle piece Fig. 21 provided with holes A & B
& bent up across dotted line C. substantially as & for the purposes herein set
forth.
5th. The construction of a Tongue by means of threading a stem A through holes
A & B. afterwards riveting the end A' as in Figs. 224 22³ & 22° substantially as
and for the purposes herein set forth.
6th. The construction of the stems 23 & 23ª provided with projections D E.
substantially as & for the purposes herein set forth.
7th. The construction of a Tongue Fig. 24 by means of riveting the projections
DE of the stem Fig. 23 through the holes A & B in knuckle piece Fig. 21
substantially as & for the purposes herein set forth.
Dated this 25th of June 1887