AN IMPROVED DEVICE FOR REGULATING THE SUPPLY OF GAS TO GAS-BURNERS
Year: 1884

page_text: .
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, London, in the County of Middlesex, do hereby declare
the nature of said Invention for "AN IMPROVED DEVICE FOR REGULATING THE
SUPPLY OF GAS TO GAS-BURNERS" and in what manner the same is to be
performed, to be partic:larly described and ascertained in and by the following
statement:
This Invention relates to means for regulating the supply of gas to the burners
of lamps used in railway vehicles and other places. The gas lamps now used for
lighting railway vehicles are sometimes provided with two screens or curtains,
arranged in such a manner that one screen permits the passengers seated on one
side of a compartment to be screened from the light but both screens have to be
drawn in order to obtain perfect darkness.
It is desirable to enable the gas to burn with a full flame when the two screens
(or only one of them) are open, and to be turned very low when the said screens
are closed.
The object of this Invention is to ensure this result, and it comprises the device
hereinafter described.
The said device consists of a cock having two concentric plugs each of which
allows a sufficient supply of gas to pass to enable the lamp to burn with a full
light. Each of these plugs is actuated by one of the parts of the movable screen.
One or both of these plugs is, or are, provided with a small supplementary aperture
which, when the cocks are turned off, allows the lamp a sufficient supply of gas to
burn with a small fame like a night light.
The said Invention is illustrated in the accompanying Drawing in which
Figures 1, 2 and 3 are respectively a front elevation, a plan, and a sectional
elevation on the line E, F Fig. 1, of the device.
Figure 4 is a section on the line A B Figures 2 and 3 the plugs being supposed
open.
Figure 5 is a horizontal section of the said cock on the line G H Figure 4.
Figure 6i e contional view on the line CD Fio & showing the cock closed

page_text: Figures 7 and 8 are sections respectively on the lines P, Q and M N Figure 4 the
two plugs being closed.
Figures 9, 10 and 11 are sectional views on the line CD Fig. 4, and shew
different positions of the plugs belonging to the said cock.
As shown in Figures 4 and 5 the cock has two plugs G G', one within the other,
but adapted to be moved in opposite directions.
The said plugs are moved by levers M M jointed to the bars N N (pivoted at o o)
forming the frames of the two screens, see Figure 3. The same result may be
obtained by the direct action of the pins oo of the two screens or by means of
suitable gearing.
gas reservoir
As shown in Figure 4, the gas passes through the pipe E from the
placed under the roof of the carriage, and enters the cock through the vertical
channel a; it thence passes through the apertures b b' of the two plugs G G¹ and
through the central channel of the inner plug, passing subsequently through the
opening c c' of the two plugs and through the pipe H which conveys the said gas
to the burner S; at this time, the gas burns with a full flame at the said burner.
If it is desired that it should only burn with a small flame as a night light, the two
plugs G G are closed (see Figure 6) and the gas ceases to pass through the channel c
of the inside plug, only passing through the channel d of the central plug and the
channel c¹ of the outside plug (see Figure 4). A screw T permits the quantity of
gas passing through the apertures d to be regulated so that the size of the small
flame may be fixed.
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
The device for regulating the supply of gas to the burners of lamps used in
railway vehicles and other places by means of the movable screens, the said device
consisting of a cock provided with two concentric plugs, each plug being actuated
by a screen, so that the lamp burns with a full flame when one of the two screens
remains open and with a small flame when the two screens are closed.
HASELTINE, LAKE Co.,
For the Applicant.