Improvements in Globes or Chimneys and Parts Adjacent to and Substitutes for the same for Use with Mantles in Incandescent Gas Lighting.
Year: 1886

page_text: Date of Application, 2nd Nov., 1886.
Complete Left, 30th July, 1887.
Complete Accepted, 30th Aug., 1887.
RES
Improvements in Globes or Chimneys and Parts Adjacent to and
Substitutes for the same for Use with Mantles in Incandescent
Gas Lighting.
I ARTHUR PAGET Mechanical Engineer of Loughborough in the County of Leicester
do hereby declare the nature of my invention for IMPROVEMENTS IN GLOBES, OR
CHIMNEYS, AND PARTS ADJACENT TO AND SUBSTITUTES FOR THE SAME FOR USE WITH
MANTLES IN INCANDESCENT GAS LIGHTING to be as follows:-
With the ordinary straight Glass chimney hitherto used for enclosing the "Mantle,"
hood, cone, cylinder, or covering, in incandescent Gas-lighting considerable inconve-
nience and expense is caused by the frequent breaking of the chimney's due to over-
heating, draughts of air and various other causes, such breakage of the chimney very
frequently destroys the mantle, hood, cone cylinder, or covering also.
The object of my invention is to obviate these difficulties by an arrangement that
will render the chimney unnecessary, or prevent its frequent breakage and at the same
time obtain a greater percentage of light from a given quantity of gas and render the
light less liable to be affected by irregular currents of air. To do this I use a Globe,
or partially Globular chimney which may be made in one piece, or several pieces as
may be most convenient; I prefer to make it in two pieces, the bottom portion being
of clear, or finely ground, or ornamental glass, and the top portion being made of Clay,
Porcelain, Plaster of paris, or other similar suitable material, having the lower internal
portion made with suitable reflecting surfaces. The form which I give to this Globe,
or chimney is such that around the mantle, hood, cone, cylinder, or covering, it shall
be sufficiently large in diameter to keep the Globe, or chimney moderately cool and to
avoid the Gas-flame touching it, or approaching too near to it, if the flame should be
diverted from its proper course by the breaking, or shifting of the mantle, hood, cone,
cylinder, or covering, or from any other cause. Immediately above the top of the
be contracted
mantle, hood, cone, cylinder, or covering; the Globe, or chimney me upper orifice
in a suitable curve to a much smaller diameter, such diameter at
bearing a suitable proportion to the diameter of the air inlet at the bottom and the
height of the Globe or chimney from top to bottom; such proportions varying, more

page_text: "
or less, with the size and sort of burner used. I find a good proportion for a Bunsen-
burner" with its upper orifice of an inch diameter to be as follows:-diameter of
opening at bottom 14 inches, diameter of opening at top 2 inches, height from
bottom to top 10 inches.
In some cases I find it an advantage also to form a hollow frustrum of a cone
around the burner, so that the top of the frustrum of the cone may be about level with
the top of the burner. This cone may if desired be part of, and form the base of the
Glass Globe, or partially Globular chimney, or it may be formed seperately and made
of Glass, Clay, porcelain, metal, or other suitable material.
When the cone is made seperate from the Globular chimney, I find it convenient to
make it with an external flange at the bottom, upon which flange the Globe, or
chimney can rest.
Dad thin and J...
N
L1000
COMPLETE SPECIFICATION.
Improvements in Globes or Chimneys and Parts Adjacent to and
Substitutes for the same for Use with Mantles in Incandescent
Gas Lighting.
I ARTHUR PAGET, Mechanical Engineer of Radmoor, Loughborough in the County
of Leicester 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 :—
With the ordinary straight glass chimney hitherto used for enclosing the mantle
hood, cone, cylinder or covering in "Incandescent gas lighting" considerable
inconvenience and expense is caused by the frequent breaking of the chimneys due to
over-heating, draughts of air and various other causes, such breakage of the chimney
very frequently destroys the Mantle, hood, cone, cylinder or covering also.
The object of my invention is to obviate these difficulties by an arrangement that.
will render the chimney unnecessary or prevent its frequent breakage and at the same
time obtain a greater percentage of light from a given quantity of gas and render the
light less liable to be affected by irregular currents of air. To do this I use a globe or
partially globular chimney which may be made in one piece or several pieces as may
be most convenient, I prefer to make it in two pieces, the bottom portion being of

page_text: clear or finely ground or ornamental glass and the top portion being made of clay,
porcelain, plaster-of-paris, or other similar suitable material having the lower internal
portion made with suitable reflecting surfaces.
The form which I give to this globe or chimney is such that around the mantle,
hood, cone, cylinder or covering it shall be sufficiently large in diameter to keep the
globe or chimney moderately cool and to avoid the gas flame touching it, or approaching
too near to it, if the flame should be diverted from its proper course by the breaking
or shifting of the mantle, hood, cone, cylinder or covering or from any other cause.
Immediately above the top of the mantle, hood, cone, cylinder or covering, the globe
or chimney may be contracted in a suitable curve to a much smaller diameter, such
diameter at the upper orifice bearing a suitable proportion to the diameter of the air
inlet at the bottom and the height of the globe or chimney from top to bottom such
proportions varying more or less with the size and sort of burner used.
I find a good proportion for a "Bunsen-burner" with its upper orifice of an inch
diameter to be as follows:-diameter of opening at bottom 14 inches diameter of
opening at top 2 inches, height from bottom to top 10 inches.
The accompanying drawing shows a section through one form of a globe or chimney
made upon the principle above referred to.
The globe or chimney is here shown made in two pieces, the bottom portion A A
being made of clear or finely ground or ornamental glass and the top portion B. B
being made of Clay, Porcelain, Plaster-of-paris or other similar suitable material. The
lower internal surface C C being available as a reflecting surface for reflecting
downwards the light emitted by the mantle, hood, cone, cylinder or covering D which
is rendered incandescent by the gas supplied through the burner E in the usual well
known manner. It will be evident that both the portions A A-B, B of the globe or
chimney may be made of glass if desired, either in two pieces as shown or all in one
piece.
In some cases I find it an advantage also to form a hollow frustrum of a cone
around the burner so that the top of the frustrum of the cone may be about level with
the top of the burner. This cone may if desired be part of and form the base of the
glass globe or partially globular chimney, or it may be formed separately and made
of glass, clay, porcelain, metal, or other suitable material.
When the cone is made separate from the globular chimney I find it convenient to
make it with an external flange at the bottom upon which flange the globe or chimney
can rest.
A cone of this description is shown in combination with the globe or chimney in
the accompanying drawing at F F and has a flange G G upon which the globe Å A
rests.
It will be evident that such a cone may be made either separate as shown in the
accompanying drawing, or in one piece with the globe, A A or with the globe A A,
and the top B B.
By means of this hollow cone a large volume of air is concentrated upon the mantle,
hood, cone, cylinder or covering, and the flame of the burner, whereby a high state of
incandescence is reached and a consequent proportionate light-giving power
obtained.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I desire it to be understood that I do
not confine myself to the exact details herein set forth as such may be varied or
modified without departing from the principle thereof, but what I claim as my
Improvements in globes or chimneys and parts adjacent to and substitutes for the
same for use with mantles in incandescent gas lighting," are :-
$6
First. The use with mantles for incandescent gas lighting of a globe, or partially
globular chimney which may be made in one piece or several pieces as may be most
convenient, I prefer to make it in two pieces, the bottom portion being of clear or
finely ground or ornamental glass, and the top portion being made of clay, Porcelain,
Plaster of paris, or other similar suitable material, having the lower internal portion

page_text: made with suitable reflecting surfaces. The form which I prefer to give to this globe
or chimney is such that around the mantle, hood, cone, cylinder, or covering it shall
be sufficiently large in diameter to keep the globe or chimney moderately cool and to
avoid the gas flame touching it, or approaching too near to it, if the flame should be
diverted from its proper course by the breaking or shifting of the mantle, hood, cone,
cylinder, or covering, or from any other cause. Immediately above the top of the
mantle, hood, cone cylinder, or covering the globe or chimney may be contracted in a
suitable curye to a much smaller diameter, such diameter at the upper orifice bearing
a suitable proportion to the diameter of the air inlet at the bottom and the height of
the globe or chimney from top to bottom such proportions varying more or less with
the size and sort of burner used substantially as herein before described with reference
to the accompanying drawing.
Second. In combination with a globe or partially globular chimney for use in
Incandescent gas lighting the use of a hollow frustrum of a cone around the burner so
that the top of the frustrum of the cone may be about level with the top of the burner.
This cone may if desired be part of and form the base of the globe or partially globular
chimney or it may be formed separately and made of glass, clay, porcelain, metal or
other suitable material substantially as herein before described with reference to the
accompanying drawing.