Year: 1886

page_text: Date of Application, 8th Nov., 1886
Complete Left, 5th Aug., 1887.
Complete Accepted, 6th Sept., 1887.
We, ANTHONY DIXON BROGAN and ANDREW MURRAY MALLOCH both of Firhill
Glasgow in the County of Lanark, Glass Manufacturers, do hereby declare the nature
of this invention to be as follows:-
In the manufacture of chequered glass the checks or squares which are formed by
cross lines appearing in relief on the surface of the glass are produced by suitably
grooving the roller of a glass rolling machine the table over which the plastic glass is
rolled being a plane surface and designed to form the smooth side of the plate. The
checks or squares so produced are usually of imperfect form and the flat side of the
glass plate which is chilled by contact with the table is dull and rough instead of being
clear and smooth.
The object of my invention is to ensure the production of chequered glass having
on the one side checks or squares of distinct outline and perfect form while the other
side has a smooth and polished appearance, and to that end I roll the glass into sheets
or plates with a plain smooth roller over a table in which cross grooves or lines
corresponding to those which are to appear on the surface of the glass are cut or
otherwise formed. After passing the roller over the molten glass the sheet so formed
is momentarily lifted at one end while in the plastic state in order to admit air under
it and prevent dimming of the chequered surface of the glass by the rapid cooling
action of the table.
Dated this Sixth day of November 1886.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.

page_text: We, ANTHONY DIXON BROGAN and ANDREW MURRAY MALLOCH both of Firhill,
Glasgow, in the County of Lanark, Glass Manufacturers 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 :-
In the manufacture of chequered glass the checks or squares which are formed by 5
cross lines appearing in relief on the surface of the glass are ordinarily produced by
suitably grooving the roller of a glass rolling machine the casting table over which
the plastic glass is rolled being a plain surface and designed to form the smooth side
of the plate. By so rolling the glass the flat side of the glass plate which is chilled
by contact with the table is dull and rough instead of being clear and smooth.
The object of our invention is to ensure the production of chequered glass having
on the one side checks or squares of distinct outline and perfect form while the other
side has a smooth and polished appearance, and to that end we roll the glass into
sheets or plates with a plain smooth roller over a table in which chequered or cross
grooves or lines corresponding to those which are to appear on the surface of the glass 1
are cut or otherwise formed. After passing the roller over the molten glass the sheet
so formed is momentarily lifted at one end while in a plastic or partially stiffened state
in order to admit air under it and prevent dimming of the chequered surface of the
glass by the rapid cooling action of the table.
In the accompanying drawings figure 1 is a perspective view of a glass casting
apparatus adapted for the production of the improved chequered glass and figures 2
and 3 are respectively a cross section and plan of a piece of the glass. The table A,
of the apparatus is suitably grooved longitudinally and transversely, the grooves being
of a formation to correspond to the ridges a, which as seen in figure 2 are to be
produced on the glass. The roller B, is smooth and its spindle is provided with the
usual spur wheels C gearing into racks D, in the table, and with handing wheels E,
by which it is operated. The glass when rolled on the table into a sheet by the
passage over it of the roller B, is permitted to partially stiffen but while still in a
sufficiently plastic state is lifted by the use of tongs or otherwise as indicated by the
dotted lines in figure 1, to admit air under it and is thereafter drawn off the table on
to a trolly upon which it is carried to an annealing kiln. A portion of the table at
each end or at the end from which the glass sheet is removed to the trolly is made
smooth or left without grooves so that the chequered surface of the sheet may be the
more readily drawn off the table without injury.

page_text: Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
1. As a new article of manufacture chequered glass having a smooth reverse surface
resembling rolled or polished plate produced substantially as described.
2. The herein described method of producing chequered glass consisting in rolling
molten glass upon a chequered or cross grooved table by means of a smooth roller and
lifting the sheet so formed while in a plastic state to admit air thereunder, substantially
as set forth.
3. For rolling chequered glass the herein described apparatus consisting of a smooth
travelling roller and a casting table having in part of its length chequered or cross
grooves of the formation described and a smooth portion at either or both ends
substantially as and for the purpose set forth.
100M
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.