Manufacture of Ceramic Stone Objects by Devitrification of Glass.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after Amend-
ment (under Section 18 of the Patents, &c. Act, 1883) as allowed by the
decision of the Chief Examiner of the 25th day of March 1898.
Date of Application, 14th Mar., 1896
2014
4007
PROVISIONAL SPECIFICATION.
Manufacture of Ceramic Stone Objects by Devitrification of Glass.
I, LOUIS ANTOINE GARCHEY, of The Demi-Lune, near Lyons, France, Ceramic
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention is based on the fact that glass highly heated for a long time under-
goes a change which may be termed devitrification, becoming opaque and similar to
porcelain; it can no longer be cut by a diamond.
I take advantage of this phenomenon to manufacture artificial, or what may be
termed ceramic stones and objects of that material which I effect as follows. I
pulverise glass preferably that charged with lime and soda; I mix the powder with
suitable colouring materials and place the mixture in an iron mould box having a
moveable bottom capable of sustaining considerable pressure, this mould being
internally faced with sand, lime, or the like to prevent adhesion of the glass.
subject the charged mould to gradually increasing heat in a suitable furnace until
the glass is near fusion, in which condition it becomes devitrified.
It is then heated to fusion by which the particles become welded together and the
devitrification is completed. The mould is then taken to a suitable press, and the
pasty glass is moulded under pressure. The article is removed from the mould and
annealed.
When imitations of marble are desired, I scatter over the pasty devitrified glass
pieces of coloured glass which when melted with the devitrified glass and stirred to
and fro, form veins as in marble, and then the mass in a pasty state is moulded under
pressure.
ABEL & IMRAY,
Agents for the Applicant.
Manufacture of Ceramic Stone Objects by Devitrification of Glass.
I, LOUIS ANTOINE GARCHEY, of The Demi-Lune, near Lyons, France, Ceramic
Manufacturer, 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:-
This invention is based on the fact that glass highly heated for a long time under-

page_text: goes a change which may be termed devitrification, becoming opaque and similar to
porcelain; it can no longer be cut by a diamond.
I take advantage of this phenomenon to manufacture artificial, or what may be
termed ceramic stones and objects of that material, which I effect as follows. I
pulverise glass, preferably that charged with lime and soda; I mix the powder with
suitable colouring materials and place the mixture in an iron mould box A such as
is shewn in section in Fig. 1 and in plan Fig. 2 of the accompanying drawings
having a moveable bottom B capable of sustaining considerable pressure, this mould
being internally faced with sand, lime or the like to prevent adhesion of the glass.
I subject the charged mould to gradually increasing heat in a suitable furnace until
the glass is near fusion, in which condition it becomes devitrified.
It is then heated to fusion by which the particles become welded together and the
devitrification is completed. The mould is then taken to a suitable press, and the
pasty glass is moulded under pressure. The article is removed from the mould and
annealed.
When imitations of marble are desired, I scatter over the pasty devitrified glass
pieces of coloured glass which when melted with the devitrified glass and stirred to
and fro, form veins as in marble, and then the mass in a pasty state is moulded
under pressure.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The herein described manufacture of ceramic stone objects by devitrifying
glass powder by heat and moulding under pressure.
2. The process of imitating marble by stirring in the partly fused and devitrified
glass pieces of coloured glass fused.
Dated this 8th day of December 1896.
ABEL & IMRAY,
Agents for the Applicant.