An Improvement in the Manufacture of Antique and other Descriptions of Sheet Glass, and Improved Apparatus in Connection therewith.
Year: 1889

page_text: Date of Application, 5th Nov., 1889
Complete Specification Left, 2nd Aug., 1890-Accepted, 6th Sept., 1890
PROVISIONAL SPECIFICATION.
An Improvement in the Manufacture of Antique and other
Descriptions of Sheet Glass, and Improved Apparatus in
Connection therewith.
1 JOHN GEORGE SOWERBY, of Sowerby's Ellison Glass Works, Limited, Gateshead
on Tyne, in the County of Durham, Glass Manufacturer, do hereby declare the nature
of this invention to be as follows:-
This invention relates to an improvement in the manufacture of antique, and other
descriptions of sheet glass, and improved apparatus in connection therewith.
The ordinary method of making such glass is to blow a cylinder and open it at each
end while hot, after which it is allowed to cool, when it is cut down with a diamond
and then reheated and opened out flat from the diamond cut.
My invention consists of first blowing the cylinder into a jointed mould, which
stands on two or more feet and has a vertical opening or slit extending down it from
top to bottom.
The glass when blown into a mould made in this way, becomes very thin at top,
bottom, and side at opening, and is easily cracked off; after which it is put into a
furnace while hot and flattened into sheets in the ordinary way.
Dated this Fifth day of November 1889.
For the Applicant,
W. E. GEDGE,
Agent.
COMPLETE SPECIFICATION.
An Improvement in the Manufacture of Antique and other
Descriptions of Sheet Glass, and Improved Apparatus in
Connection therewith.
1 JOHN GEORGE SOWERBY, of Sowerby's Ellison Glass Works, Limited, Gateshead
on Tyne, in the County of Durham, Glass 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 relates to an improvement in the manufacture of antique and other
descriptions of sheet glass, and improved apparatus in connection therewith.
The ordinary method of making such glass is to blow a cylinder and open it at each
end while hot, after which it is allowed to cool, when it is cut down with a diamond
and then reheated and opened out flat from the diamond cut.
My invention consists of first blowing the cylinder into a jointed mould, which
stands on two or more feet and has a vertical opening or slit extending down it from
top to bottom.
On the accompanying sheet of drawing:
:-
Figure 1 represents a vertical section through a mould suitable for the manufacture
of sheet glass according to my invention.
Figure 2 being a plan of same.
A being the moulds, B the feet, C vertical opening or slit in mould, D hinge pin,
E the handles.
The glass when blown into a mould made in this way, becomes very thin at top,
bottom, and side at opening, and is easily cracked off; after which it is put into a
furnace while hot and flattened into sheets in the ordinary way.
I desire it to be understood that I do not limit myself to any particular construction
of mould so that the same is provided with the vertical slit C, or its equivalent, whereby
the cylinder is made with a thin part which may be cracked off thereby dispensing
Prins 21

page_text: with the ordinary cooling and cutting with a diamond and thus simplifying and
accelerating the manufacture.
Having now particularly described and ascertained the. nature. of my said
invention, and in what manner the same is to be performed, I declare that what
.I claim is :-
1. The manufacture of antique and other descriptions of sheet glass by first blowing
the cylinder into a jointed mould having a vertical opening or slit, or its equivalent,
then cracking it off, passing it into a furnace and finaily flattening it into sheets,
substantially as described.
2. In the manufacture of antique and other description of sheet glass the use of a
jointed mould having a vertical opening or slit substantially as described for the
purpose specified.
Datal 19
24
1000
For the Applicant,
W. E. GEDGE,
Agent.