IMPROVEMENTS IN THE MANUFACTURE OF TESSERE AND OTHER MOSAIC INLAYS
Year: 1862

page_text: LETTERS PATENT to George Maw, of Benthall Works, near Broseley, in
the County of Salop, Manufacturer, for the Invention of "IMPROVEMENTS
IN THE MANUFACTURE OF TESSERE AND OTHER MOSAIC INLAYS."
Sealed the 11th March 1863, and dated the 19th September 1862.
PROVISIONAL SPECIFICATION left by the said George Maw at the
Office of the Commissioners of Patents, with his Petition, on the 19th
September 1862.
I, GEORGE MAW, of Benthall Works, near Broseley, in the County of
Salop, Manufacturer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF TESSERE AND OTHER MOSAIC INLAYS,"
to be as follows, that is to say:-
This Invention consists in producing tesseræ and other forms employed in
mosaic work of glass, enamel, or other vitreous material, by casting or
moulding such forms upon a principle in which the finished article is dis-
charged from a different part of the die or mould to that by which the molten
material is admitted, and I prefer to carry out my Invention in the following
manner:-Firstly, by casting or pressing the molten glass or other vitreous
material in moulds formed of a metal plate of about the thickness of the
articles to be moulded and perforated with one or more apertures of the form
required for the tesseræ or inlays, care being taken that, for the purpose of
ensuring the ready delivery of the finished forms, these apertures be pierced
taper. When the mould is being worked a face plate is placed underneath it,

page_text: that is to say, upon that side of the moulding plate upon which the perforations
are widest; this face plate prevents the escape of the molten metal through
the mould, forming also the face of the tessers or other forms of inlays. The
molten glass or vitreous metal is filled into the mould from its upper surface
through the smaller ends of the perforation, and is forced in so as to fill them
by any of the usual means employed in pressing glass. As soon as the molten
material has set the superfluous metal is broken away from the backs or
exposed ends of the tesseræ, the forms themselves remaining in the moulds
until the under plate or face plate is removed, when the moulded articles
will be discharged face forwards. The moulding plate may be in one piece
or in several parts; if it be desired to mould square or undercut forms it inust
be in several parts to admit of the removal or discharge of the finished forms.
I can also produce these tesseræ or other forms of inlays, by stamping them,
of glass or other vitreous material, employing for this purpose a perforated
plate pierced with perforations of the form of the article to be moulded, such
perforations being in close contiguity one with the other and the divisions
between each brought to a fine edge, by which means the molten or semi-
molten metal may be cut into a series of tesseræ or inlay forms; if not entirely
separated by the pressure, .they can be subsequently divided by fracture or
cut from the face side with a diamond or by other means.
My Invention also consists in gilding tesseræ and other inlays, when made
of clays or earthenware, porcelain, parian, or other ceramic bodies, by the
application of gold leaf to their surfaces under a vitreous, glaze..
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Maw in the Great Seal Patent Office on the 19th 2
March 1863.-
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
MAW, of Benthall Works, near Broseley, in the County of Salop, Manufac-
turer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters 3
Patent, bearing date the Nineteenth day of September, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said George Maw, Her special license that I, the said George Maw, my
executors, administrators, and assigns, or such others as I, the said George 3
Maw, my executors, administrators, and assigns, should at any time agree

page_text: with, and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN THE MANU-
FACTURE OF TESSERE AND OTHER MOSAIC INLAYS," upon the condition (amongst
others) that I, the said George Maw, by an instrument in writing under my
hand and seal, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said George Maw, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement (that is to say):
:-
.
This Invention consists in producing tesseræ and other forms employed in
mosaic work of glass, enamel, or other vitreous.material, by casting or
moulding such forms upon a principle in which the finished article is dis-
charged from a different part of the die or mould to that by which the molten
material is admitted, and I prefer to carry out my Invention in the following
manner:-Firstly, by casting or pressing the molten glass or other vitreous
material in moulds formed of a metal plate of about the thickness of the
articles to be inoulded, and perforated with one or more apertures of the form
required for the tesseræ or inlays, care being taken that, for the purpose of
ensuring the ready delivery of the finished forms, these apertures be pierced
taper. When the mould is being worked a face or bottom plate is placed
underneath it, that is to say, upon that side of the moulding plate upon which
the perforations are widest; this face plate is formed with a flange allowing
the mould to fit into it and thus preventing the escape of the molten metal
through the mould, forming also the face of the tesseræ or other forms of
inlays. The molten glass or vitreous metal is filled into the mould from its
upper surface through the smaller ends of the perforations, and is forced in so
as to fill them by any of the usual means employed in pressing glass. As soon
as the molten material has set the superfluous metal is broken away from the
backs or exposed ends of the tesseræ, the forms themselves remaining in the
noulds until the under plate or face plate is removed, when the moulded
articles will be discharged face forwards. The moulding plate may be in one
piece or in several parts; if it be desired to mould square or undercut forms
it must be in several parts to admit of the removal or discharge of the finished
forms. I can also produce these tesseræ or other forms of inlays, by stamping

page_text: them, of glass or other vitreous material, employing for this purpose a per-
forated plate pierced with perforations of the form of the article to be moulded,
such perforations being in close contiguity one with the other and the divisions
between each brought to a fine edge, by which means the molten or semi-
molten metal may be cut into a series of tesseræ or inlay forms; if not entirely
separated by the pressure they can be subsequently divided by fracture, or cut
from the face side with a diamond or by other means.
My Invention also consists in gilding or silvering tessera and other inlays,
when made of clays or earthenware, porcelain, parian, or other ceramic bodies,
by the application of gold or silver leaf to their surfaces under a vitreous
glaze.
Having thus described the nature of my said Invention, and in what manner
the same is to be performed, I claim the improvements in the manufacture of
tesseræ and other mosaic inlays in manner herein more fully set forth and
specified.
In witness whereof, I, the said George Maw, have hereunto set my hand
and seal, this Eighteenth day of March, in the year of our Lord One
thousand eight hundred and sixty-three.
GEORGE MAY