An Improved Construction of Reflector Lamp for Gas-lights, and also an Improved Cover for Globes Surrounding Gas-lights.
Year: 1890

page_text: Date of Application, 5th Mar., 1890
Complete Specification Left, 5th Dec., 1890-Accepted, 10th Jan., 1891
PROVISIONAL SPECIFICATION.
An Improved Construction of Reflector Lamp for Gas-lights, and also
an Improved Cover for Globes Surrounding Gas-lights.
I, JOSEPH SHAW, of Albert Brass Works, Lockwood, near Huddersfield, in the
County of York, Brass Founder and Finisher, do hereby declare the nature of this
invention to be as follows:-
My improved construction of reflector lamp for gas-lights consists in arranging a
series of gas burners in a circle, but standing up at an angle, say of 45 degrees, or
other convenient angle. Rising up from the centre of the series of gas burners is a
cone-shaped body or part with its apex at the bottom, and projecting up from the
base or broad part of the cone is another cone with its apex upwards. In combination
with these double cones is another projecting cover or concave reflector having the
underside thereof enamelled or burnished. This concave reflector is supported by a
bridge or other suitable framework, and the said reflector has a hole formed in the
centre thereof, so that an annular space or aperture is left between the apex of the
upper cone and the opening in the centre of the reflector so as to allow for the escape
of the spent gases, and if need be the opening in the reflector may be connecte with
a ventilator for the purpose of conducting away the spent gases. The cover or
reflector can be raised and lowered for the purpose of enlarging or diminishing the
aperture around the apex of the upper cone. This form of lamp is not only a powerful
reflector, but the heat underneath the reflector is so great that the carbon in the gas
is perfectly consumed and no sinoke given off.
My improved cover to be applied to globes surrounding gas-lights consists in the
employment of a cover or disc made of asbestos or other suitable material. In the
centre of this disc is a circular opening. A bridge (connected to the upper part of
the disc) carries a screw thread, the bottom of which screw is attached to the apex of
a cone, carrying a convex or inverted washer or disc or the said screw may be attached
direct to the convex washer, the diameter thereof being larger than the opening in
the cover. This cone or convex washer passes up through or into the central opening
in the first named disc, and by means of an adjusting nut, to the screw, the area of
the opening left between the cone or convex washer and the hole in the disc can be
regulated accordingly. The convex cover or disc is made of asbestos or other suitable
material. The spent gases arising from the light cannot escape so readily as is the
case when a large opening is left in the top of the globe, consequently the heat within
the globe becomes intense, having the same effect as a regenerative lamp, whereby
the carbon in the gas arising from the burner is consumed, thus giving a
maximum amount of light whilst the smoke given off is reduced to the lowest
possible point.
Dal this 4th day of Marah 1800
TASKER & CROSSLEY,
Huddersfield, Agents.
COMPLETE SPECIFICATION.
An Improved Construction of Reflector Lamp for Gas-lights, and also
an Improved Cover for Globes Surrounding Gas-lights.
I, JOSEPH SHAW, of Albert Brass Works, Lockwood, near Huddersfield, in the
County of York, Brass Founder and Finisher, 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:-
My improved construction of reflector lamp for gas-lights consists in arranging a
series of gas burners in a circle, but standing up at an angle, say, of 45 degrees, or

page_text: other convenient angle. Rising up from the centre of the series of gas burners is a
cone-shaped body or part with its apex at the bottom, and projecting up from the base
or broad part of the cone is another cone with its apex upwards. In combination
with these double cones is a projecting cover or concave reflector having the
underside thereof enamelled or burnished. This concave reflector is supported by
a bridge or other suitable framework, and the said reflector has a hole formed
in the centre thereof, so that an annular space or aperture is left between the apex
of the upper cone and the opening in the centre of the reflector so as to allow
for the escape of the spent gases, and if need be the opening in the reflector may
be connected with a ventilator for the purpose of conducting away the spent gases.
The cover or reflector can be raised and lowered for the purpose of enlarging or
diminishing the aperture around the apex of the upper cone. This form of lamp is not
only a powerful reflector, but the heat underneath the reflector is so great that the
carbon in the gas is perfectly consumed and no smoke given off.
In order that this part of my invention may be better understood, I will now make
reference to the accompanying sheet of drawings illustrative thereof, wherein
Fig. 1 is front elevation and Fig. 2 vertical section of my improved form of
reflector lamp, comprising three or other number of gas burners A secured to the
globe or chamber B supplied with gas by vertical pipe C from any convenient
source. D represents a double cone resting upon the part a and kept in position
by the cap or nut which is made to fit the upper screwed part of the vertical
feed pipe C. In combination with these double cones is a projecting cover or
concave reflector E, and it is made with a central opening, the inner edges of
which rest upon the flange c of the bridge F, the upper end of which is tapped
with screw threads so as to be adjustable up or down for the purpose of increasing
or diminishing the size of the annular opening d left between the part c and
the apex of the cone e. G is a locknut to fasten the bridge on the pipe C. The
annular space d allows the escape of the spent gases, and when required the
annular opening may be increased or diminished by raising or lowering the bridge F
as already described. This form of lamp possesses the advantages of the regenerative
system without any complicated parts liable to derangement, and by utilizing the
products of combustion (which gather underneath the reflector) for heating the gas
and air to be burnt, an increased luminosity is given to the carbon contained in
the gas; the light is also purified and intensified, whilst an increased radiation,
diffusion, and distribution of light is obtained.
In Fig. 3I have shewn the same form and construction of lamp as already
described, but instead of employing the upper cone for forming or obtaining the
annular groove d, I have dispensed with the upper cone and lowered the bridge F
further down the feed pipe C. The rim of the reflector rests, as in the previous case,
upon the flange e of the bridge F, thereby forming an annular space d as before, the
size of which can be increased or diminished by raising or lowering the bridge, as is
done with regard to Figs. 1 and 2.
An enlarged elevation of the bridge F is shewn in Fig. 4, whilst Fig. 5 is plan
view of same.
My improved cover to be applied to globes surrounding gas lights consists in the
employment of a cover or disc made of asbestos or other suitable material. In the
centre of this disc is a circular opening. A ring rising from the disc and attached
thereto surrounds the opening therein and is provided on the upper edge with slots
or openings of varying depths, in any two of which is supported a bridge or bar
having a convex washer or inverted asbestos cup suspended therefrom. The asbestos
cup is slightly smaller in diameter than the opening in the centre of the disc, and its
position in said opening determines the area of the space between the cup and disc,
such position being altered or regulated by placing the bar in deeper or shallower
openings in the circular ring and thereby making the area of the said space larger
or smaller.
This part of my invention is shewn in Figs. 6, 7, 8, and 9, wherein A represents
an ordinary gas globe, on the top of which is my improved apparatus, comprising

page_text: a disc B made of asbestos or other suitable material formed with a central hole, and
in order to keep the disc in position on the top of the globe I employ devices similar
to paper fasteners a, where one leg is left vertical, as shewn at 6 in Fig. 7, which
keeps the disc in a proper position. Rising up from the disc is a ring Chaving
slots formed in the upper edge thereof. D represents a cone suspended from the
horizontal bridge or har E, which is supported in the slots c formed on the top of
the ring C. The cone occupies such a position in the opening of the disc as to leave
an annular groove d, the size or area of which can be increased or diminished by
placing the horizontal bar E into other slots in the top of the ring, which slots < are
of different depths for that purpose. Figs. 8 and 9 shew two methods of attaching the
cone D to the bar E.
By the use of the disc and cone as shewn and described herein, the spent gases
arising from the light cannot now escape so readily as when a large opening is left in
the top of the globe, consequently the heat within the globe becomes intense, having
the same effect as a regenerative lamp, whereby the carbon in the gas arising from the
burner is consumed, thus giving a maximum amount of light, whilst the smoke
given off is reduced to the lowest possible point.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
Firstly. In a gas light reflecting lamp, the use of gas burners placed at an angle, in
combination with a double cone-shaped body and an adjustable reflector and annular
opening or aperture such as d, all arranged as described and shewn in Figs. 1 and 2.
Secondly. In a gas light reflecting lamp, the use of gas burners placed at an angle
in combination with a single cone-shaped body and an adjustable reflector and annular
opening or aperture d, all arranged as shewn in Fig. 3.
Thirdly. The combination of the disc A and cone D arranged to leave an annular
groove or space d to be used in connection with globes surrounding gas lights in
manner substantially as described.
Dated this 4th day of December 1890.
TASKER & CROSSLEY,
Halifax and Huddersfield, Agents.