Improvements in Incandescent Gas Lamps.
Year: 1896

page_text: Date of Application, 25th Jan.. 189
Complete Specification Left, 26th Oct., 1896-Accepted, 28th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in Incandescent Gas Lamps.
Old
I, HENRY TALBOT of the South Metropolitan Gas Company, of 709
Kent Road, London, S.E., Inspector, do hereby declare the nature of this
invention to be as follows:-
This invention relates more particularly to the incandescent gas lamps which are
used for out-door lighting, whether public or private, and the invention consists in
certain details of construction by which this class of lamp is rendered more
suitable for the purpose.
The economical use of the Welsbach mantles for public lighting necessitates the
use of a pilot light; also that the mantle should be supported by a yielding support,
so that the vibration caused by the traffic should not fracture the mantle, and
further, that the gas supply should be properly governed.
In carrying out my invention, I take an ordinary Welsbach burner, and I adapt
thereto, at a point preferably just below the mixing chamber, a disc or other
suitable governor, which will regulate the supply of gas to the chamber in
accordance with the pressure on the main.
I also attach the gallery for supporting the chimney, to the guard disc, instead
of to the cap, and I make the cap to rise and fall on the nozzle of the burner.
For this purpose, it is supported by two or more light springs, which are
mounted in any convenient manner on the guard disc.
I provide a pilot light external of the mantle, and I arrange the tap or cock so
that when the main supply is on, the pilot is out, and rice versa.
The main supply cock is provided with a lever by which the lamp-lighter may
turn the gas on and off with his torch, on his rounds, and this lever is provided with
a pin which operates a counterweighted or spring arm on the cock of the pilot-light,
so that the latter may be turned off when the main is on, the counterweight serving
to close the pilot when the main is on.
Dated this 25th day of January 1896.
NEWTON & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Incandescent Gas Lamps.
HENRY TALBOT of the South Metropolitan Gas Company, of 709 Old
Kent Road, London, S.E., Inspector, 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 more particularly to the incandescent gas lamps which are
used for out-door lighting, whether public or private, and the invention consists in
certain details of construction by which this class of lamp is rendered more
suitable for the purpose.
The economical use of the Welsbach mantles for public lighting necessitates the
use of a pilot light; also, that means should be provided for turning out the pilot
when the main burner is alight, and vice versa.

page_text: The pilot light is placed externally of the mantle, and I arrange the tap or
cock of the pilot light so that when the main supply is on, the pilot is out, and
vice versa.
For this purpose, the main supply cock is provided with a lever by which the
lamp-lighter may turn the gas on and off with his torch, on his rounds, and this
lever is provided with a pin which works in a slot of, and operates, an arm on the
cock of the pilot light, so that the latter may be turned off when the main is on,
and turned on when the main supply is off.
In the accompanying drawing:-
Fig. 1 is a side elevation of an incandescent burner with my invention applied
thereto.
Fig. 2 is a section, shewing the two cocks in the position for the main off and
the pilot on; and
Fig. 3 is a similar view, shewing the cocks in the position for the main on and
the pilot off.
A is the burner, the construction of which is now well known, and B is the
governor, which is placed just below the burner, and governs the supply of gas
thereto, and C is the pilot light. D is the plug of the main cock, and C the plug
of the pilot cock. The supply of gas for the pilot light is taken from below the
plug C, as clearly shewn in the figures, and also from below the point where the
governor is placed.
E is a lever on the plug D, which is operated in the well known manner by the
torch of the lamp-lighter. On one end of the lever E is a pin F, which takes into
a slot in a lever arm G on the plug C. The exact amount of movement to
be given to the lever E, when it is desired to turn off the gas, is regulated by
the screw H, which is suitably placed to strike against a shoulder E' on the back
of the lever E (see Fig. 1). This screw is fixed in the desired position by the
binding screw J.
The movement of the lever arm G is thus regulated by the movement of the
lever E.
It will be seen from Figs. 2 & 3, that the gas-ways through the plugs D and C¹
are so arranged that one is not closed until the other is partially opened, and that
when the main supply is fully closed, the pilot is partially throttled, although it has
been fully opened, to allow the pressure of gas to force out the air, and to enable
the gas to light.
In this way, while I ensure absolutely the lighting of the two burners, I also
reduce the supply of gas to the pilot to the minimum consonant with safety;
otherwise the variation of pressure during the day might cause a waste of gas,
because the pilot light cannot be conveniently be governed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In incandescent burners for street lighting purposes, provided with a pilot
light, simultaneously operating the taps or cocks of the main supply and the pilot
supply, for the purpose set forth.
2. The arrangement of parts for simultaneously operating the main and pilot
supply cocks, as shewn and described.
Dated this 24th day of October 1896
NEWTON & SON,
Agents for the Applicant.