Improvements in Incandescent Gas Lamps for Street Lighting and like purposes.
Year: 1896

page_text: Date of Application, 4th Mar., 1896-Accepted, 25th Apr., 1896
COMPLETE SPECIFICATION.
Improvements in Incandescent Gas Lamps for Street Lighting and
like purposes.
I, JOHN LEES of The Hollies, Reigate Surrey, Fellow of the Surveyor's
Institute, 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 to improvements in connection with incandescent gas lamps,
and has for its object to provide an incandescent gas lamp for use principally out of
doors, viz. for street lighting and such like purposes.
In order to avoid the damage to the mantles by vibration, caused by the usual
method of pole lighting, I propose to render the service pipe more rigid. I also
provide to each light a bye-pass, permitting a small pilot light to burn whether the
full burner is alight or not.
In carrying out my invention I find it desirable that the upper end of the service
pipe should be fixed, by a block of wood or other suitable material to the lamp
post or standard, a layer of felt or the like being placed around the supply pipe at
the part where it passes through the block. To the end of the service pipe I attach
preferably a "Peebles" or other automatic governor, and above 'that the usual
regulating cock for street lighting.
Between the governor and the regulating cock, I take off a small tube to the
bye-pass, permitting the gas to burn as a pilot light at the mouth of the incandescent
gas burner in the manner at present adopted. The end of the bye-pass tube before
joining on to the burner is screwed into a small metal cylinder, the top of which is
drilled so as to allow the required quantity of gas to pass, and at the same time to
fit the socket of the burner.
Owing to the bye-pass tube starting immediately below the regulating cock, it
is not in any way disturbed on actuating the cock, and thius a small flame continually
burns without danger of being extinguished, or of damaging the mantle. It also
burns at an even pressure through the agency of the Peebles or other automatic
governor below the regulating cock. I use an ordinary incandescent gas light
burner, which burner is on the inside of the street lamp but the cock and governor
are on the outside of lamp. Thus no chains or other appliances of this description
are required, and it enables the bottom of the lamp to be glazed and protected '
from draught.
In order that the invention may be more clearly understood, reference is had to
the accompanying drawing, which shows the arrangement in side elevation. A is
the stem of the ordinary regulating cock B, which is usually fixed to the end
of the service pipe C, but according to my invention it is fitted to the governor D.
The bye-pass tube E extends from between the governor and the regulating cock
towards the top and is screwed into a small metal cylinder, which fits in the
socket F, the top of the cylinder having a small hole drilled in it, through which
the gas passes. Owing to the bye-pass being taken from between the regulating
cock and the governor, the supply of gas to the bye-pass will be regulated by the
governor, which will keep the flame quite steady. The bye-pass will thus be quite
independent of the regulating cock. By means of the screw G the amount of gas
passing through the bye-pass can be regulated.
In the existing arrangement of bye-pass for incandescent gas burners, the action

page_text: is likely to be faulty should the cock be actuated so rapidly as to permit the gas
supply to the burner to be cut off before the pilot light becomes ignited. In
accordance with my invention this will be impossible as the pilot light is always
burning, and at an even pressure and independently of the cock to the incandescent
gas burner.
The burner H which is fitted in the usual manner on the stem is furnished with
the bye-pass I terminating in the usual manner in the socket F into which the
metal cylinder on the end of the pipe E fits.
In the existing arrangement the end of the service pipe is usually left free of the
standard and also considerable play is left between the socket of the burner and the
stem on which it is fitted thus allowing the burner to vibrate freely, thereby
endangering the mantle. I propose to prevent this vibration by fitting a block of wood
or other material K into the standard L having a hole drilled through it allowing
the service pipe C to pass through it thus rendering this pipe quite rigid, and also
by expanding the stem of the burner slightly at both ends by a mandril or other
means. The service pipe is provided with a layer of felt K¹ or like material at the
part passing through the block K. The lower part of the stem A, the regulating
cock B, the lower part of the bye-pass pipe, and the governor D are all placed
outside the glass frame M of the lamp.
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.) Improvements in incandescent gas lamps consisting in placing the bye-pass
tube between the regulating cock for the incandescent flame, and a governor
attached to the service supply pipe, substantially as shown and for the purposes
:specified.
(2.) The improved incandescent gas lamp, having bye-pass fitted below the
regulating cock, and independent of it, and an automatic governor screwed into
position below the bye-pass tube, substantially as described and for the purposes
:specified.
(3.) The combination of the regulating cock B the bye-pass E and the bye-pass
'regulating screw G and the governor D substantially as described and for the
purposes specified.
(4.) In an incandescent street lamp, the combination of the block fixing the end
of the service pipe and expanding of the stem of the burner, with the regulating
cock B, the bye-pass E, the regulating screw G and the governor D substantially
as shown in the accompanying drawings, and for the purposes specified.
Dated this 4th day of March 1896.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.