IMPROVEMENTS IN THE MANU- FACTURE OF ARTIFICIAL MARBLE OR STONE
Year: 1876

page_text: LETTERS PATENT to Louis Abraham Brode, of Glasgow, in the County of
Lanark, North Britain, for the Invention of "IMPROVEMENTS IN THE MANU-
FACTURE OF ARTIFICIAL MARBLE OR STONE."
Sealed the 16th March 1877, and dated the 20th September 1876,
PROVISIONAL SPECIFICATION left by the said Louis Abraham Brode at the
Office of the Commissioners of Patents on the 20th September 1876.
LOUIS ABRAHAM BRODE, of Glasgow, in the County of Lanark, North Britain.
"IMPROVEMENTS IN THE MANUFACTURE OF ARTIFICIAL MARBLE OR STONE"
This Invention, which relates to certain improvements in the manufacture of
artificial marble or stone, has for its object to produce such imitation marble or
stone of a much harder condition than that in which it has hitherto been obtained.
The basis of the improved artificial marble or stone is the same as that used in such
artificial marble or stone as has hitherto been produced, namely, Keene's cement,
with which colouring matter either in a pulverulent condition or as a liquid is
mixed, according to the colours and character of the artificial marble or stone which
it is desired to imitate.
In order to produce the requisite hardness of the artificial marble or stone, and
which feature constitutes the essence of this Invention, there is mixed with the
Keene's cement a portion of finely ground glass and salt, or finely ground glass
and alum; proportions of these substances which are found to answer in practice
being,-
Keene's cement
Ground glass
Salt or alum
These proportions may however be considerably varied.
10 parts.
1 part
part.
A further feature, which is important to the success of this Invention, is that the
whatenees are commingled together with hot water.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Louis Abraham Brode in the Great Seal Patent Office on the 19th March
1877.
LOUIS ABRAHAM BRODE, of Glasgow, in the County of Lanark, North Britain.
"IMPROVEMENTS IN THE MANUFACTURE OF ARTIFICIAL MARBLE OR STONE."
My said Invention, which relates to certain improvements in the manufacture of
artificial marble or stone, has for its object to produce such imitation marble or
stone of a much harder quality than that in which it has hitherto been obtained.
The basis of the improved artificial marble or stone is the same as that used in such
artificial marble or stone as has hitherto been produced, namely, Keene's cement,
with which colouring matter either in a pulverulent condition or as a liquid is
mixed, according to the colours and characters of the artificial marble or stone which
it is desired to imitate.
In order to produce the requisite hardness of the artificial marble or stone, and
which feature constitutes the ossence of this Invention, there is mixed with the
Keene's cement a portion of finely ground glass and salt, or finely ground glass
and alum. Proportions of these substances which are found to answer in practice
aro,-
Keene's cement
Ground glass
Salt or alum
10 parts by weight.
1 part by weight.
1 part by weight.
These proportions may however be considerably varied.
A further feature, which is important to the success of this Invention, is that
the substances are commingled together with hot water, but cold water may be
used.
Having now described and particularly ascertained the nature of my said
Invention, and the system, mode, or manner in or under which the same is or may
be used or practically carried into effect, I would observe in conclusion that what
I consider to be novel and original and therefore claim as the Invention secured to
me by the herein-before in part recited Letters Patent is, the use or employment of
ground glass and salt or alum in the manufacture of artificial marble or stone, as and
for the purpose herein-before described.
In 'witness whereof, I, the said Louis Abraham Brode, have hereunto set my
hand and seal, this Seventeenth day of March, One thousand eight hundred
and seventy-seven.
LOUIS ABRAHAM BRODE. (LS.)