Improvements relating to Gas Lamps.
Year: 1898

page_text: · PROVISIONAL SPECIFICATION.
Improvements relating to Gas Lamps.
I, HENRY TALBOT, of the South Metropolitan Gas Company, of 709A, Old Kent
Road, London, S.E., Superintendent of Public Lighting, do hereby declare the
nature of this invention to be as follows:-
The chief object of this invention is to provide a lamp more especially for out-
door incandescent gas lighting, but the invention is applicable also for indoor
lighting, whether for incandescent or ordinary gas lighting, and the invention
consists in a novel construction of lamp which will permit, amongst other things,
of the cleaning of the glass globe without removal from the lamp, and also of a
novel arrangement whereby a single burner may be readily replaced by two,
three, or more burners, according to requirements.
In carrying out this invention, the body of the lamp consists of a tubular portion
which serves as a chimney. The outlet of this portion is restricted by means of
an inverted cup placed inside the tube, and having a central hole of a given size.
Above this cup, and arranged externally of the tube, is a cap of suitable size
secured to the tube by stays or otherwise.
To the bottom of the tube is secured a conical piece which serves the double
purpose of a collector for the gases of combustion and and a deflector for air.
Concentric with the tube, and attached thereto in any convenient manner, just
above the cone, is an air chamber, to which air is admitted through perforations
in the side, and from which the air passes by perforations in the bottom.
Attached to the body are bracket arms carrying telescopic or other expansible
devices for supporting a globe ring.
This ring consists of two or more sections of flanged metal, having trunnions to
be carried by the supporting devices, the sections being secured by screws, or in
any other convenient manner, to a complete ring of somewhat less depth, so as
to leave a space between the bottom edge of the ring and the flange of the sections.
The glass globe is formed with a flange which overlies the flange of the sections,
and the globe is inserted in position by removing one or more sections, pushing
the globe laterally into the remaining sections, and then replacing the removed
sections, securing them by the screws, or otherwise, to the rings, as before men-
tioned.
This ring is drawn or pushed up against the under side of the air chamber (the
perforations in which do not extend beyond the ring), and the ring is secured or
locked in any convenient manner.
In the bottom of the globe is formed an opening of convenient size, which is
closed by a hit-and-miss valve, so that a certain amount of air can be admitted,
according to the number of burners employed.
The gas supply pipe is brought in centrally at the top of the chimney, and is
secured thereto in any convenient manner. The pipe is then bent so that it
will pass down the side of the tube into the globe, the contour of which it more

page_text: or less follows, and it is then turned upwards to receive the burners, but the
supply pipe may of course enter at any other point of the lamp body.
The burners are, however, not attached to this pipe, but to what I may term a
carrier, which is screwed onto the pipe, for a reason to be presently explained.
For external incandescent lighting, it is almost essential to have a pilot light,
and such pilot light has to be supplied by a separate small and slight supply pipe.
For the purposes of this invention, the pilot supply pipe is placed inside the
main supply pipe, and means have to be provided for separating the pilot light
from the main burners. I therefore provide the carrier above mentioned, which
consists of two superposed chambers, into both of which the main supply is
screwed. The end of this pipe is stopped up, except for the pilot supply pipe,
which thus forms the only means of conveying gas into the upper chamber, with
which the pilot light or lights is or are connected.
The gas passes from the supply through lateral openings into the lower
chamber, which is supplied with bracket arms for the burner or burners, thus, the
main and pilot supplies are kept separate, and, by changing the carriers, the
number of burners may be increased or decreased at will.
To clean the globe (which requires constant attention), the globe is let down
clear of the burners by means of the telescopic or equivalent arrangement, and
it can then be cleaned without removing it from the lamp, an operation which
generally is attended with great risk, especially in outdoor lighting.
When cleaned it is pushed up again, and locked in position as before stated.
Dated this 17th day of August 1898.
NEWTON & SON,
Agents for the Applicant.
Improvements relating to Gas Lamps.
I, HENRY TALBOT, of the South Metropolitan Gas Company, of 709A, Old Kent
Road, London, S.E., Superintendent of Public Lighting, 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:-
The chief object of this invention is to provide a lamp more especially for out-
door incandescent gas lighting, but the invention is applicable also for indoor
incandescent gas lighting, and the invention consists in a novel construction of
lamp which will permit, amongst other things, of the cleaning of the glass globe
without removal from the lamp, and also of a novel arrangement whereby a single
burner may be readily replaced by two, three, or more burners, according to
requirements.
In the accompanying drawing,
Fig. 1 is a sectional elevation of a lamp constructed according to my invention.
Fig. 2 is an underside plan view of the same, with the glass globe removed;
and
Fig. 3 is a front view of the burner holder.
A is the body of the lamp, which consists of a tubular portion, to serve as a
chimney. The outlet of this portion is restricted by means of a truncated conc
or other convenient device B, having a central hole of a given size, say, for an
ordinary lamp, about two inches in diameter.
This contraction at the top appears to have an important bearing on the proper
working of the lamp. By its use.. I am able to either increase or diminish the

page_text: number of burners, without interfering with the working of the lamp, and
without altering in any way the normal illuminating power of each burner.
I have found that with a chimney up to, and not exceeding 9 inches in dia-
meter, a contraction to about two inches gives satisfactory results. Above that
diameter, I may slightly increase the outlet, but, as the result of my experiments,
there does not appear to be any relative proportion between the diameter of the
chimney and that of the outlet.
Above the cone B, and arranged externally of the tube, is an inverted cup C,
of suitable size, secured to the tube A by stays or otherwise.
To the bottom of the tube A, is secured a conical piece D, which serves the
double purpose of a collector for the gases of combustion, and a deflector to deflect
the air onto the inside of the enclosing globe, which is thereby kept comparatively
cool, and the flickering of the flame is prevented.
Around the tube, and just above the cone 1), is arranged an air chamber E, to
which air is admitted through the numerous small perforations in the walls thereof,
and from which the air passes by similar perforations in the bottom, as shown
by the arrows in Fig. 1.
By the use of this air chamber the currents of air are broken up and steadied,
so that the air passes therefrom in a continuous steady flow, and, by reason of the
deflector, forms, as it were, into a cylinder or annulas of air, and not a number
of separate streams.
Attached to the body A, are bracket arms A', carrying telescopic or other
expansible devices F for supporting a globe ring G.
This ring consists of two or more sections of flanged metal, one or more of
which is or are provided with trunnions, or a trunnion H, to be carried by the
supporting devices F. These sections are secured by screws, or in any other
convenient manner, to a complete ring J, of somewhat less depth, so as to leave
a space between the bottom edge of the ring J and the flange of the sectional
ring G.
K is a glass globe, which is formed with a flange K¹, to overlie the flange of the
sections G, which thus support the globe K. To insert the globe K in position,
one or more of the sections of the ring G is or are removed, and the globe is
pushed laterally into the remaining sections. The removed sections are then
replaced, and secured by the screws, or otherwise, to the ring J, as before men-
tioned.
The ring holder G, J, is drawn or pushed up against the underside of the air
chamber (the perforations in the bottom of which do not extend beyond the
ring G), and the ring G is secured or locked in position by the prongs of the
sliding forked piece L, the ends of which come under the trunnions H, as shown
in Fig. 2, or in any convenient manner.
In the bottom of the globe is formed an opening of convenient size, which is
closed by a hit and miss valve M, so that a certain amount of air can be
admitted to the globe, if desired.
As the lamp is to be used preferably as a pendent lamp, the gas supply pipe N
is brought in centrally of the cone, at the top of the chimney A, and is secured
to the chimney in any convenient manner. The pipe N is then bent, so that it
will pass down the side of the tube A into the globe K, the contour of which it
more or less follows, and it is then connected to the burners. The supply pipe N
may of course enter at any other point of the lamp body, or through the bottom:
of the globe, if desired, for a standard lamp.
The burners are, however, not attached direct to the supply pipe N, but to
what I may term a "carrier," which is screwed onto the pipe N.
For external incandescent lighting, it is almost essential to have a pilot light,
and such pilot light is also attached to the carrier.
For the purposes of this invention, the pilot supply pipe O is placed inside the
main supply pipe N, and means are provided for separating the pilot light from
the main burners. To this end the carrier consists of two superposed chambers, l'Q,

page_text: into the upper one Q of which, the pilot supply pipe O alone enters. The pilot
light or lights R is or are connected with this upper chamber Q, as shown in
Fig. 3.
The gas passes from the supply pipe N into the lower chamber P, which is
supplied with bracket arms S, to carry the burner or burners (not shown). The
main and pilot supplies are thus kept separate. Carriers will be arranged for
one, two, or more burners, and, by changing the carriers, the number of Burners
may be increased or decreased at will.
To clean the globe (which requires constant attention), the forked latch Lis
drawn back, so that the telescopic or equivalent arrangement can work, and let
the globe descend clear of the burners (see dotted position, Fig. 1), and it can
then be cleaned without removing it from the lamp, an operation which generally
is attended with great risk, especially in outdoor lighting.
When cleaned, the globe is pushed up again, and the supporting ring G is
again locked in position by the forked latch L.
T is a reflector of any kind, which may be attached to any convenient part of
the lamp frame.
I may here remark that the details of construction of the burner carrier may
vary considerably, and, beyond the fact that there must be two separate chambers,
one for the pilot light supply, and the other for the main burner supply, and that
the pilot pipe O is connected with one, and the main supply N is connected with
the other, the exact mode of connection may be left to the fancy of the gas fitter.
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:
1. A lamp for incandescent gas lighting, constructed, arranged, and operating
as herein shown and described.
2. In a gas lamp for incandescent lighting, in which a chimney is used to
carry off the products of combustion, and the air to support combustion is brought
in from above the burner, contracting the outlet of the chimney as herein shown
and described.
3. Mounting the globe of a lamp for incandescent gas lighting in a suitable
support carried by a telescopic or other expansible device, as and for the purpose
hercin set forth.
4. A carrier for the main and pilot burners of a lamp for incandescent gas
lighting, and consisting of two superposed and separate chambers provided with
means for receiving the pilot burners, and the main incandescent light burners,
and having a separate gas supply, as herein shown and described.
Dated this 17th day of Nov 1800
Dated this 17th day of Nov 1800
NEWTON & SON,
Agents for the Applicant.
NEWTON & SON,
Agents for the Applicant.