Improvements in the Ornamentation of Glass.
Year: 1892

page_text: Date of Application, 21st Oct., 1392-
Complete Specification Left. 21st July, 1893-Accepted 2nd Sept., 1893 …….
PROVISIONAL SPECIFICATION.
Improvements in the Ornamentation of Glass.
I STEPHEN WALTER ABBOTT, of Southall in the County of Middlesex;
Manufacturer do hereby declare the nature of this invention to be
follows
―:
as
This invention relates to the production of artistic and decorative designs and
effects upon glass surfaces. The method of operating comprises the production of
incised lines in the glass, modelling the surface of the glass, and the local application
thereto of coloured glass or vitreous enamels for heightening the effect of the
incised and moulded surface. All of these operations are performed by the aid of
heat applied by means of an instrument of the kind known as Paquelin's thermo-
cauter, which is already largely used in the process of pyrographic decoration on
wood and other material susceptible of being readily charred. The effect however
in the case of glass is quite different as the glass instead of being burned away is
merely softened superficially by the locally applied heat, the glass being rendered
sufficiently plastic to perinit the formation of incised lines and depressions, and to
enable the glass to be modelled by the pressure of the tool so as to impart a cameo
like effect to the previously uniform surface of the glass and thus fill in the outline
and heighten the general effect of the artistic design. The coloration of the design
is effected by the application to the softened surface of particles of coloured
vitreous material which are softened and appropriately fashioned by the heat of the
tool and at same time caused to adhere in the desired positions to the surface of
the glass.
COMPLETE SPECIFICATION.
11. 1 '
Improvements in the Ornamentation of Glass.
1 STEPHEN WALTER ABBOTT of Southall, in the County of Middlesex,
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 the production of artistic and decorative designs and
effects upon glass surfaces. The method of operating comprises the production of
incised lines in the glass, modelling the surface of the glass, and the local application
thereto of colored glass or vitreous enamels for heightening the effect of the incised
and moulded surface. All of these operations are performed by the aid of heat
applied by means of an instrument of the kind known as Paquelin's thermo-cauter,
which is already largely used in the process of pyrographic decoration on wood and
other material susceptible of being readily charred. The effect, however, in the
case of glass is quite different, as the glass, instead of being burned away or
destroyed, is merely softened superficially by the locally applied heat, the glass
being rendered sufficiently plastic to permit the formation of incised lines and
depressions, and to enable the glass to be modelled by the pressure of the tool so as
to impart a cameo-like effect to the previously uniform surface of the glass and
thus fill in the outline and heighten the general effect of the artistic design.
Ordinary plate glass is best suited for the purposes of this invention, as it presents
Pin d

page_text: a better surface and is more easily softened. The platinum point of the instrument
should be finer than for pyrographic drawing upon wood and other easily charred
surfaces and should be used at a higher temperature, namely at a white heat, or
nearly so, in order to soften the surface. of the glass without undue pressure. It
should not be applied too long at one particular spot, otherwise there is danger of
splitting the glass by, local overheating. The work should be performed as
generally as possible over the whole surface of the glass so as to keep it at nearly
uniform temperature. The frosted effect produced by the burr thrown up by the
action of the tool may be retained, or the burr may be removed by scraping with
a knife so as to leave a clean line which may be decorated by filling with gold
paint or with dry color rubbed in. Or the coloration of the design may be effected
by the application to the softened surface of particles of colored vitreous material
which are softened and appropriately fashioned by the heat of the tool and at same
time caused to adhere in the desired positions to the surface of the glass.
1
In order to obtain sufficient heat for the 'tool it is desirable to supply the
receptacle containing the benzoline with a tap or regulator by which the supply of
air and benzoline vapor may be accurately proportioned so as to obtain the
maximum of heating effect.
7.
1
puki ni
Having now particularly described and ascertained the nature of the said" inven
tion and in what manner the same is to be performed, I declare that what, I
claim is.
I
"1. The herein described process of producing artistic and decorative effects upon
glass by locally softening the surface of the glass by means of a heated point of
the kind, and in the manner, herein specified.
16
"
-1
2. The herein described process of obtaining artistic and decorative effects upon
glass by producing incised lines in and modelling the surface of the glass by
softening the same by means of a heated point and by fusing colored glass or
vitreous enamels to the glass by the same means and in the manner specified.
3. A glass plate or surface decorated by incised lines and by modelling produced
in or on the surface of the glass by the local application of a heated point or tool,
substantially as specified...
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