Year: 1888

page_text: Date of Application, 14th Feb., 1888
Complete Specification Left, 12th Nov., 1888
Complete Specification Accepted, 31st Dec., 1888
EDWARD STORY 8 Saint Benet Place London Merchant and ROBERT PUNSHON
172 Fleet Street London Civil Engineer do hereby declare the nature of this invention
to be as follows:-
and
The object of the invention is to make Glass out of Gunnislake Granites or
and
and
Granulités -Syenites Elvans. Our Method of doing this is first to reduce
ог
or
the Granite, Granulite, Syenite or Elvan to a powder by any Mechanical means and then
mix it with Soda Silicate
and
or
and
or
and
Sulphate of Soda Carbonate of Soda
and
Lime
or
or
and
or
and
Chalk - Marble
Asbestos all reduced to powder and then melt the mixture in a .
or
furnace.
"

page_text: Improvements in the Manufacture of Glass.
We, EDWARD STORY, of 8 St. Benet Place, London, Merchant, and ROBERT PUNSHON,
of 172 Fleet Street, London, Civil 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 make glass from Gunnislake Granites, Granulites,
or Syenites, or from Elvan, or any suitable granitic material, or from a mixture of any
two or more of these materials. For this purpose we first reduce the material to
small pieces or to powder by roasting or calcining, by crushing or grinding, or by
other suitable mechanical means, or by a combination of roasting.or calcining with
crushing, grinding or other mechanical means; we then mix the material so prepared
with silicate of soda either alone or mixed with sulphate or carbonate of soda, and we
then or previously add powdered Asbestos either alone or mixed with powdered Lime,
Chalk, Marble or other limestone, or with a mixture of any two or more of such
materials, and we then fuse the mixture in an ordinary glass furnace, or other furnace
suitable for the purpose, so as to form a glass.
When it is desired to vary. the colours of the glass produced by our invention, the
colouring materials usually employed in glass manufacture, such as Magnanese,
Arsenic, Cobalt, etcetera, may be added in the usual way.
The proportions of the above mentioned ingredients may be varied according to the
purpose for which the glass is intended, and the character of the granitic material
employed for example, good results may be obtained by. using the following
proportions..
Granitic materials
Silicate of Soda
Asbestos
Lime, Marble, Chalk )
78 to 45 parts by weight-
10 20
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"
10
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Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we desire to have it understood 3
that we are aware that it is not novel to manufacture glass from granulite by fusing
that material with sulphate or carbanate of soda, and chalk, or marble, and we make
no claim generally to the manufacture of glass from those materials, but we declare
that what we do claim is :-
First The manufacture of glass from Granite, Granulite, Syenite, Elvan, or other a
granitic material, or from mixtures of such materials, by reducing, the same to small

page_text: pieces or powder, mixing with Silicate of soda, either alone or mixed with Sulphate or
Carbonate of Soda, adding Asbestos, either alone or mixed with Lime, Chalk, Marble
or other limestone, or with a mixture of such substances, and then fusing the mixture
substantially as herein before described.
Second In the manufacture of glass from Granite, Granulite, Syenite, Elvan, or
other granitic material, the use, as fluxes of such materials, of silicate of soda and of
asbestos, substantially as hereinbefore described.
Dated this Tenth day of November A.D. 1888.
EDWARD STORY,
ROBERT PUNSHON,
115, Cannon Street, London, E.C.