Manufacturers of Heating and Ventilating Apparatus
Year: 1885

page_text: I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this Invention a communication to me
from abroad by La Société Appert frères (Glass Manufacturers) of 66 Rue Notre
Dame de Nazareth and La Société Geneste-Herscher et Compagnie (Manufacturers
of Heating and Ventilating Apparatus) of 42 Rue du Chemin Vert, both in Paris,
France to be as follows:-
This invention relates to a new industrial product, consisting of perforated glass
and also to processes and apparatus for manufacturing the same.
The invention consists in forming perforations preferably of truncated conical
form in sheets of plate or other glass whether plain or coloured, and of a thickness
suited to the purpose to which it is to be applied. The perforations may be more
or less finely distributed and may either be made in rows like those of a screen
or in patterns to give the glass an ornamental appearance. When used for
ventilating purposes the larger diameter of the perforations would be on the
inside of the glass so as to permit of the ready diffusion of the air within the
apartment.
The uses to which perforated glass may be put are very numerous and one of
the most important consists in its application for the purpose of aerating and
ventilating dwellings, as a substitute either partially or entirely for ordinary
window glass or the ordinary window ventilators. Glass of this kind possesses
great advantages combining as it does means both of lighting and ventilating,
while owing to the number of the perforations and their small size and form, all
objectionable currents of air are avoided.
By superposing two exactly similar perforated sheets of glass and sliding one on
the other to a very slight extent, the perforations may be closed or more or less
uncovered so as either to cut off or regulate the admission or expulsion of air
necessary for ventilation. The product may also be employed in other cases where
the two fold effect above mentioned is desired to be obtained. It may also be used
077

page_text: as a screen or filter plate in apparatus in which materials are employed liable to
attack metals, or for forming diaphragms in columns and other apparatus in which
liquids, gases or corrosive vapours circulate.
Where the perforations in the glass are made to form patterns these may either
remain open or be ornamented by the application of opaque or translucent enamels,
enamelled metals, ceramic or other materials painted, metallized or decorated in
any manner.
It will be understood that the invention consists broadly in the novel product
above described whatever may be its mode of manufacture, I have however
hereinafter described several methods which may be employed for the purpose
which also constitute part of the invention.
The perforations may be directly produced in ordinary window glass by the
means commonly employed, viz water and sand, emery and water or spirits of
turpentine, but it is preferred to use the apparatus represented in the accompanying
drawing in which figure 1 represents a side elevation, figure 2 an end view and
figure 3 a plan view of same.
The glass is cast on a slab or table a which may be provided with raised edges
to give it the desired thickness, said table being furnished with projections f of
truncated conical, truncated pyramidal or other form; according to the shape to be
given to the perforations.
After the glass has been run onto the table considerable pressure is applied upon
its surface either by means of a press such as is ordinarily used for moulding glass,
or preferably by means of a roller b such as is used in the manufacture of plate
glass; or the roller may be stationary and the table be made to run on rails m
as shown.
According to another arrangement the table may be smooth and the truncated-
conical or truncated-pyramidal projections be mounted on a pressing roller of
sufficient diameter, or if a press be employed, they may be carried on the
press plate.
Motion is imparted to the table by racks c fixed thereon and gearing with
pinions & upon a shaft e to which motion is imparted by the hand wheel g, the
motion being transmitted to roller 6 by the gear wheels pq. The driving shaft is
mounted in bearings h and the bearings of roller b are mounted on springs in a
frame i, the pressure of the roller being regulated by screws k. The whole
apparatus is supported on a frame n of any suitable kind.
On the perforated plate of glass being removed from the table after being cast
and flattened by the roller or press, it will be found that some of the holes are
completely perforated while others still retain a thin film of glass at the base which
is then removed either by hand by means of scissors, or a hammer or other tool
provided for the purpose, or by mechanical means either with the aid of a drill or
boring tool made of steel, stone or emery composition mounted in a similar manner
to the tools of perforating or punching machines and operated by a lever or treadle,
or by means of a jet of sand or emery discharged by a current of compressed air at
a sufficient pressure, or by means of liquid or gazeous hydro-fluoric acid, directed
upon the necessary points in any suitable manner or instead of hydro-fluoric acid,
hydro-fluates or other substances capable of producing the same results, may be
used. The glass after being perforated, may then be finished or decorated like
ordinary window glass, or by polishing on one or both sides like plate glass or
engraved with the aid of acid or sand, or enamelled and painted.

page_text: the same.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this Invention (a communication to me
from abroad by La Société Appert frères (Glass manufacturers) of 66 Rue Notre
Dame de Nazareth and La Société Geneste-Herscher et Compagnie (Manufacturers
of Heating and Ventilating Apparatus) of 42 Rue du Chenin Vert, both in Paris,
France,) 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 a new industrial product, consisting of perforated glass
and also to processes and apparatus for manufacturing the same.
The Invention consists in forming perforations preferably of truncated conical
form in sheets of plate or other glass whether plain or coloured, and of a thickness
suited to the purpose to which it is to be applied.
The perforations which may be round, oval, rectangular, stelliform, or of other
form, may be more or less distributed and may either be in rows like those of a
screen or in patterns to give the glass an ornamental appearance.
When used for ventilating purposes the larger diameter of the perforations would
be placed towards the inside of the apartment, so as to permit of the ready diffusion
of the air.
The uses to which perforated glass may be put are very numerous and one of the
most important consists in its application for the purpose of airing and ventilating
dwellings, as a substitute either partially or entirely for ordinary window glass or
the ordinary window ventilators.
Glass of this kind possesses great advantages, combining as it does means both of
lighting and ventilating, while owing to the number of the perforations and their
small size and form, all objectionable draughts are avoided.
By combining two exactly similar perforated plates of glass and causing one to
slide upon the other, the perforations may be more or less closed, so as to cut off or
regulate the admission or exit of air.
The product may also be employed in other cases where the two fold effect above
mentioned is desired to be obtained. It may also be used as a screen or filter plate
in apparatus in which materials are employed liable to attack metals, or for forming
zigzags or diaphragms in columns and other apparatus in which liquids, gases or
corrosive vapours circulate.
Where the perforations in the glass are made to form patterns these may either
remain open or be ornamented by the application of opaque or translucent enamels,
enamelled metals, ceramic or other materials painted, metallized or decorated in
any manner.
It will be understood that the invention consists broadly in the novel product
above described whatever may be its mode of manufacture. I have however
hereinafter described several methods which may be employed for the purpose
which also constitute part of the invention.

page_text: The perforations may be directly produced in ordinary window glass by the
means commonly employed, viz:-water and sand, emery and water, or spirits of
turpentine, but it is preferred to use the apparatus represented in the accompanying
drawing in which figure 1 represents a side elevation, figure 2 an end view and
figure 3 a plan view of same.
The glass is cast on a slab or table a which may be provided with raised edges
to give the plate the desired thickness, said table being furnished with projections f
of truncated conical, truncated pyrimidal or other form, according to the shape to
be given to the perforations.
After the glass has been run onto the table considerable pressure is applied upon
its surface either by means of a press, such as is ordinarily used for moulding glass,
or preferably by means of a roller b such as is used in the manufacture of plate
glass; or the roller may be stationary and the table be made to run on rails m
as shown.
Or, the table may be smooth and the truncated-conical, or truncated-pyramidal
projections be carried on a pressing roller of sufficient diameter, or if a press be
employed, they may be carried on the press plate.
Motion is imparted to the table by racks c fixed thereon and gearing with
pinions d upon a shaft e to which motion is imparted by the hand wheel g, the
motion being transmitted to roller b by the gear wheels p. q. The driving shaft is
mounted in bearings h and the bearings of roller 6 are mounted on springs in a
frame the pressure of the roller being regulated by screws k.
The whole apparatus is supported on a frame n of any suitable kind.
On the perforated plate of glass being removed from the table after being cast
and flattened by the roller or press, it will be found that some of the holes are
completely perforated, while others are still obstructed by a thin film of glass which
is then removed either by hand by means of scissors, or a hammer or other tool
provided for the purpose, or by mechanical means either with the aid of a drill or
boring tool made of steel, stone or emery composition mounted in a similar manner
to the tools of perforating or punching machines and operated by a lever or treadle,
or by means of a jet of sand or emery discharged by a current of compressed air at
a sufficient pressure, or by means of liquid or gazeous hydro-fluoric acid, directed
upon the necessary points in any suitable manner or instead of bydro-fluoric acid,
hydro-fluates or other substances capable of producing the same results, may be
used. The glass after being perforated, may then be finished or decorated like
ordinary window glass or be polished on one or both sides like plate glass or
engraved with the aid of acid or sand, or enamelled and painted.
Having now particularly described and ascertained the nature of this Invention,
I declare that what I claim is :-
Tho herein-described process of manufacturing perforated plate glass by casting
upon a table and applying pressure by means of a roller or press plate, either the
table or the roller or press-plate being provided with projections adapted to form
the desired perforations in the glass, the thin films of glass which may remain in
the holes after the sheet is perforated, being afterwards removed by any suitable
means, all as before specified.