IMPROVE- MENTS IN ILLUMINATION LAMPS AND IN APPARATUS FOR MOULDING THE SAME OR OTHER SIMILAR GLASS VESSELS AND ARTICLES
Year: 1882

page_text: LETTERS PATENT to James Pain of 121 Walworth Road Pyrotechnist and
William Henry Gritton junior of the Phoenix Glass Works 7 Holland Street
Blackfriars both in the County. of Surrey for an Invention of "IMPROVE-
MENTS IN ILLUMINATION LAMPS AND IN APPARATUS FOR MOULDING THE
SAME OR OTHER SIMILAR GLASS VESSELS AND ARTICLES"
PROVISIONAL SPECIFICATION left by the said James Pain and William
Henry Gritton, junior, at the Office of the Commissioners of Patents on the
4th February 1882.
JAMES PAIN of 121 Walworth Road Pyrotechnist and WILLIAM HENRY GRITTON
junior of the Phoenix Glass Works 7 Holland Street Blackfriars both in the
County of Surrey. "IMPROVEMENTS IN ILLUMINATION LAMPS AND IN APPARATUS
FOR MOULDING THE SAME OR OTHER SIMILAR GLASS VESSELS AND ARTICLES "
Hitherto illumination lamps have been first made by hand and then dipped to
form diamond or other shaped facets on the surface then reheated and the rin
turned over and finished by the skill of the workman.
Lamps thus inade were very irregular in thickness and shape and consequently
very liable to fracture from unequal expansion when in use the bottom was also
uneven owing to its severance from the "puntney
"
Now according to our improvements such lamp glasses are made uniformly
alike by being blown into suitable moulds in which they are finished at one
operation.
Our improved mould is formed in two or more parts hinged or jointed together
being so formed as to make a blown rimmed neck to the lamp glass of uniform
thickness with the body of the glass throughout.
Thus by finishing the lanip glass in the mould it leaves it readily when the

page_text: mould is opened and whatever design is formed upon the inner surface of the
mould is transmitted to the glass moulded therein and as the bottom of each lamp
glass is moulded they all stand quite level and upright and when candles are used
to illuminate them they stand steadily therein as in a socket.
By the above means illumination lamp glasses are made in much less time than
by the old method of blowing and finishing by hand and are much less liable to
fracture owing to the uniform thickness of the glass both of the body and the rim
and as each one is an exact counterpart of the other they have a much better effect
when in usc.
Blown rimmed-necks may also be formed in like manner in accordance with our
improvements upon glass jars vessels and other articles if required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Pain and William Henry Gritton, junior, in the Great Scal
Patent Office on the 4th August 1882.
JAMES PAIN of 121 Walworth Road Pyrotechnist and WILLIAM HENRY GRITTON
junior of the Phoenix Glass Works 7 Holland Street Blackfriars both in the
County of Surrey "IMPROVEMENTS IN ILLUMINATION LAMPS AND IN APPARATUS
FOR MOULDING THE SAME OR OTHER SIMILAR GLASS VESSELS AND ARTICLES."
Hitherto illumination lamps have been first made by hand and then dipped to
form diamond or other shaped facets on the surface then reheated and the rim
turned over and finished by the skill of the workman.
Lamps thus made were very irregular in thickness and shape and consequently
very liable to fracture from unequal expansion when in use the bottom was also
uneven owing to its severance from the "puntnoy."
Now according to our improvements such lamp glasses are made uniformly
alike by being blown into suitable moulds in which they are finished at one
operation.
.
Our improved mould is formed in two or more parts hinged or jointed together
being so formed as to make a blown rim neck to the lamp glass of uniform
thickness with the body of the glass throughout.
Thus by finishing the lamp glass in the mould it leaves it readily when the
mould is open and whatever design is formed upon the inner surface of the mould
is transmitted to the glass mould therein and as the bottom of each lamp glass is
moulded they all stand quite level and upright and when candles are used to
illuminate them they stand steadily therein as in a socket.
By the above means the illumination lamp glasses are made in much less time
than by the old method of blowing and finishing by hand and are much less liable
to fracture owing to the uniform thickness of the glass both of the body and the
rim and as each one is an exact counterpart of the other they have a much better
effect when in use.
Blown rimmed necks may also be formed in like manner in accordance with our
improvements upon glass jars vessels and other articles if required.
And in order that our improvements may be clearly understood and readily
carried into practice we will now describe the Drawings hereto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a plan and Figure 2 a section through the line A. B. of Figure 1
of a mould for moulding illumination lamps in accordance with our iniprovements
Figure 3 shows an elevation of one of such improved lamps.
The mould a represented in the Drawing is formed in three moveable parts 1, 2, 3
jointed or hinged together at a', a¹ with a central part fixed on the base plato b
for moulding the bottom of the lamp. Each of the moveable parts has a pin which
passes into slots b' in the base plate b which serve to guide the parts when they
are opened out or expanded into the position shewn by dotted lines in Figure 1 by
means of the lever arms cc in order to release the moulded lamp.
By this means illumination lamps d of a superior character to those hitherto
used may be made with great facility and of one uniform thickness throughout
both of the body d. and rim d'.
From the above description it will be evident that rimmed necks may also be

page_text: formed in accordance without improvements upon glass jars vessels and other
articles by blowing the same into the moulds in the manner previously described.
Having thus described the nature of our improvements and the manner of
performing or carrying the same into practice we would have it understood that
we do not claim any of the parts separately which are well known and in common
use.
But what we claim is :-
First. The improved manufacture of illumination lamps and other similar glass
vessels or articles by blowing and finishing the same in moulds substantially in
the manner herein before described and represented in the Drawings annexed.
Second. We claim the improved arrangement and construction of moulds in
two or more parts hinged or jointed together so as to mould illumination lamps
and other similar vessels and articles with rimmed necks of uniform thickness with
the body of the lamp or other articles of glass throughout substantially in the
manner and for the purpose herein before described and represented in the Drawings
hereto annexed.
.In witness whereof I the said William Henry Gritton junior have hereunto
set my hand and seal this Third day of August in the year of our Lord
One thousand eight hundred and eighty two.