A NEW OR IMPROVED MANUFACTURE OF VARIOUS INLAID ARTICLES FOR ORNAMENTAL, USEFUL, or DECORATIVE PURPOSES."
Year: 1880

page_text: LETTERS PATENT to Godfrey Hirst, of Whitby, in the County of York, Jet
Ornament Manufacturer, for an Invention of "A NEW OR IMPROVED
MANUFACTURE OF VARIOUS INLAID ARTICLES FOR ORNAMENTAL, USEFUL, or
DECORATIVE PURPOSES."
PROVISIONAL SPECIFICATION left by the said Godfrey Hirst at the Office
of the Commissioners of Patents on the 2nd June 1880.
GODFREY HIRST, of Whitby, in the County of York, Jet Ornament Manufacturer.
"A NEW OR IMPROVED MANUFACTURE OF VARIOUS INLAID ARTICLES FOR
ORNAMENTAL, USEFUL, OR DECORATIVE PURPOSES."
My Invention relates to a new or improved manufacture of various inlaid articles,
and consists in the employment and application to such articles of jet or the like,
for the purpose of producing various ornamental, useful, or decorative articles and
objects.
In carrying out my Invention I proceed as follows:-
I first make a model in any suitable material of the article I wish to produce,
or I take any article or object in existence, be it a vase, inkstand, card-tray, or
picture frame, and from this model I take a mould in sulphur, wax, or plaster in
precisely similar manner to that done in manufacturing statuettes, busts, etc. Into
this mould I place a templet made of tin or zinc, and sufficiently large to cover the
bottom of the mould, and into which the form of the design I wish to use has been
cut. I then put the design face downward into the mould at the place made in the
templet to receive it, the design being formed of suitably shaped slabs, plates,
tablets, or pieces of jet or the like, and where desirable the metallic mounts usually
employed in jet ornament manufacture. Into the mould thus prepared I run a
matrix composed of a plastic material, such for instance as plaster of Paris (gypsum),
or any of its preparations, cement, india rubber, artificial ivory, Parksine, or the
like, and using the usual means, such as brushing, or shaking, or pressing, to ensure
the proper and complete filling of the lines of the device or design, and I allow the
cast to set or harden in the mould. When this setting or hardening is complete I
remove the mould and set the cast aside to dry, either at the ordinary temperature
or by the application of gentle heat, as may be desirable or requisite.

page_text: When the cast is removed from the mould the jet forming the design or device
will be found to project above the surface of the plaster a distance equal to the
thickness of the tin or zinc templet. This difference in level between the design or
device and the plaster is intended to allow of a coat or a number of coats of any
suitable varnish or enamel being applied to the body of the article, so as to leave
a perfectly level surface in which the device or design is perfectly embedded.
After the article is dry it receives a coating of hot glue-size, and when the size is
dry the enamel or varnish is applied to the depth required.
Previous to enamelling or varnishing the article may be electro-plated.
When india rubber is employed as a matrix it is vulcanized before being
enamelled.
A novel article of manufacture, suitable for ornamental, useful, and decorative
purposes, is thus produced, and one in which the slabs, plates, tablets, or pieces of
jet or the like employed and applied are firmly inlaid or embedded in the matrix.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
"
the said Godfrey Hirst in the Great Seal Patent Office on the 2nd December
1880.
GODFREY HIRST, of Whitby, in the County of York, Jet Ornament Manufacturer.
A NEW OR LMPROVED MANUFACTURE OF VARIOUS INLAID ARTICLES
ORNAMENTAL, USEFUL, OR DECORATIVE PURPOSES."
FOR
My Invention relates to a new or improved manufacture of various inlaid articles,
and consists in the employment and application of jet to such articles for the
purpose of producing ornamental, useful, or decorative articles and objects.
In carrying out my Invention I proceed as follows:-
I first take a model in any suitable material of the article I wish to produce, and
from this model I take a mould in sulphur, wax, plaster, or metal in a precisely
similar manner to that done in manufacturing statuettes, busts, etc. Into this
mould I place a metal templet sufficiently large to cover the bottom thereof, or I
sink into the mould, when of metal, the form of the device or design I require.
The mould being thus prepared I place the design (which may be made of one or
more suitably shaped slabs or pieces of jet, and when requisite the metallic mounts
usually employed in jet ornament manufacture) in the mould at the places prepared
to receive it. I then fill the mould with any suitable plastic material, such, for
instance, as gypsum, or any of its preparations, cement, caoutchouc, or the like,
coloured as may be desired, and employ the usual means to ensure the proper and
complete filling of the lines of the device or design, such as brushing, shaking, or
pressing; I then allow the cast to set or harden.
When set or hardened I remove the mould, and place the cast aside to dry,
either at the ordinary temperature or by the application of gentle heat, as may be
desirable or requisite.
When the cast is removed from the mould the jet forming the device or design
will be found to project above the surface of the plastic material a distance equal
to the thickness of the templet or the depth of the device cut in the inetal mould.
This difference in level is intended to allow of a coat or a number of coats of any
suitable varnish or enamel of the colour required being applied to the body of the
article, and when sufficiently covered I smooth and level the surface by means of
sand-paper, and finally polish with rotten stone or with whiting.
Instead of enamelling or varnishing the article may be electro-plated.
When caoutchouc is employed it is vulcanized after the lines of the design are
filled.
In another arrangement or modification I take a slab or piece or a number of
slabs or pieces of jet, and engrave upon it or them any device or design I desire,
and I fill the spaces left by the engraving with enamel, caoutchouc, or the like, of
the colour desired, after which I submit the article to a gentle heat, or to both
heat and pressure combined, as may be requisite or necessary. After the drying or
both drying and pressing is or are complete I grind off any superfluous portions of
the filling on an ordinary grindstone, and polish the article in the usual way.
These slabs or pieces of jet so prepared may be embedded in any suitable matrix
and employed for ornamenting various articles, or each piece may be used as an
ornament for personal wear.
Having now described the nature of my said Invention, and in what manner the
same may be performed, I declare that I claim,-
The manufacture of various inlaid articles for ornamental, useful, or decorative
purposes, consisting in the employment and application of a slab, plate, or tablet, or

page_text: a number of slabs, plates, or tablets of jet combined with a suitably coloured plastic
material, substantially as specified for the purposes set forth.
In witness whereof, I, the said Godfrey Hirst, have hereunto set my hand and
seal, this Twelfth day of November, in the year of our Lord 1880.
Witness,
JAMES WILLISON,
17, Clarence Place,
Whitby.
GUDERI INI. (L.S.)