Improvements in Incandescent Gas Lamps.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Incandescent Gas Lamps.
I, HARRY TEE, of 50, Castle Street, Liverpool, in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows:--
This invention has reference to incandescent gas lamps of the kind in which
the light is provided by a mantle or filamentous hood or cap heated by a gas
flame; and in which this mantle or cap is of a delicate nature and is liable
to become broken or disintegrated by vibrations, such as those that exist in
streets, and under other analogous circumstances.
According to this invention, the mantle is supported in suspension by a
suspended flexible connection, such as a chain, cord, or the like, of incombustible
material, at the temperatures existing in the lamp, or which is not dele-
teriously affected by heat. This flexible connection should be of considerable
length, and it is supported by a wire extending up through the burner, and is
in itself somewhat springy. In some cases where desired, this wire support is
secured to the edge of the protector cups used on such mantles, being in the
form of a claw or clip, fitting over the edge, whilst in other cases it may
be secured to the body of the burner or other part. The wire may also have
spiral turns in it to give it greater springiness, and to diminish the vibrations
it receives at the point of supporting the mantle suspending connection.
In action, by supporting the mantles by a flexible support or connection of
considerable length, as described, (say several inches) in the form of a cord,
chain, or the like, the vibrations which are transmitted to the burner are inter-
cepted, and do not reach the mantle, or, are so modified, or their sharpness
and severity diminished, that the destruction of the mantle from this cause
is obviated, or its life prolonged largely beyond that which it would under other
circumstances have; and furthermore, it constitutes a very simple, neat, and
inexpensive mode of accomplishing this result.
The improvements herein described may be employed in combination or
separately, accordingly as they may be serviceable under different circumstances.
Dated this 23rd day of May 1899.
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents, 15, Water Street, Liverpool.
Improvements in incandescent Gas Lamps.
I, HARRY TEE, of 50 Castle Street, Liverpool, in the County of Lancaster,
5 Engineer, do hereby declare the nature of this invention and in what manner
[Price 8d.]

page_text: the same is to be performed, to be particularly described and ascertained in and
by the following statement:—
This invention has reference to incandescent gas lamps of the kind in which
the light is provided by a mantle or filamentous hood or cap heated by a gas
flame; and in which this mantle or cap is of a delicate nature and is liable
to become broken or disintegrated by vibrations, such as those that exist in
streets, and under other analogous circumstances.
According to this invention, the mantle is supported in suspension by a
suspended flexible connection, such as a cord, chain, or the like, of incombustible
material, at the temperatures existing in the lamp, or which is not dele-
teriously affected by heat. This flexible connection should be of considerable
length, and it is supported by a wire extending up through the burner, and is
in itself somewhat springy. In some cases where desired, this wire support is
secured to the edge of the protector cups used on such mantles, being in the
form of a claw or clip, fitting over the edge, whilst in other cases it may
be secured to the body of the burner or other part. The wire may also have
spiral turns in it to give it greater springyness, and to diminish the vibrations
it receives at the point of supporting the mantle suspending connection.
In action, by supporting the mantles by a flexible support or connection of
considerable length, as described, (say several inches) in the form of a cord,
chain, or the like, the vibrations which are transmitted to the burner are inter-
cepted, and do not reach the mantle, or, are so modified, or their sharpness
and severity diminished, that the destruction of the mantle from this cause
is obviated, or its life prolonged largely beyond that which it would under other
circumstances have; and furthermore, it constitutes a very simple, neat, and
inexpensive mode of accomplishing this result.
The drawing hereto annexed illustrates the invention, shewing an incandescent
gas lamp with my improvements applied to it, in outside view.
In this drawing, a represents the mantle, and b is the flexible suspender, consist-
ing of a cord of incombustible material, such as asbestos cord. c is the wire sup-
port, carrying the cord b. is the glass or other chimney; and e is the burner
proper. f is a mantle protector cup of any known type, fitting over the head
of the burner; and to this cup, the lower end of the wire c is connected.
The lamp glass is shewn further supported, and prevented from moving out
of position, by an external supporting ring h, carried by the bars h¹ from the
gallery . The top of the wire c is carried across as shewn, so as to nearly touch
the inside of the glass. These arrangements and provisions prevent the glass,
and supports for the cord b, and mantle, from moving out of their correct position
in relation to the burner proper, so that the mantle is held truly central over the
head of the burner.
The suspender is preferably formed of a light continuous flexible cord of incom-
bustible material, such as asbestos, as it is very light, flexible, and inexpen-
sive; and it will not convey vibrations which may be imparted
to the burner or lamp down from the supports c to the mantle. It
should be of considerable length, about such as shewn or at any rate, of such a
length, that the vibrations that may be transmitted to its upper end, will be
entirely or greatly dissipated or lost in such length, and will not reach the upper
end of the mantle. Nevertheless, in lieu of a continuous cord of this kind being
employed, it may be articulated, or of link work of any light incombustible
material, or material which will not quickly burn at the temperature to which it
is subjected.
The best effects are obtained by making the suspender light say not heavier
than, or so heavy as, the mantle itself; as the weight of the mantle then tends
to prevent the transmission of vibrations down its suspender. A cord such as
described affords this qualification.

page_text: An incandescent gas lamp mantle support therefore, according to this inven-
tion, is a non-vibration-transmitting-suspender, directly suspending the mantle.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:―
1. In an incandescent gas lamp, a mantle supported over the burner by a
flexible non-vibratory suspender, substantially as set forth.
2. An incandescent gas lamp having a long mantle suspender of incombustible
flexible cord; substantially as set forth.
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents, 15, Water Street, Liverpool.