Improvements in Lamps, especially applicable as a Means for Detecting the Presence of Gas in Mines.
Year: 1895

page_text: Date of Application, 7th June, 1895
Complete Specification Left, 27th Feb., 1896-Accepted, 25th Apr., 1896
PROVISIONAL SPECIFICATION.
Improvements in Lamps, especially applicable as a Means for
Detecting the Presence of Gas in Mines.
I, WILLIAM OUTTERSON WOOD of South Hetton in the County of Durham,
Mining Engineer do hereby declare the nature of this invention to be as
follows:-
My invention is applicable to all kinds of wick lamps and especially to oil
burning safety lamps as used in mines and provides a ready and reliable. means
of reducing to any desired degree the flame and rendering it if desired almost
non luminous and thus specially suitable for detecting the presence of gas in
a mine.
The essential feature of the invention consists in the application to the wick
tube of a sliding sleeve adjustable thereon and formed or provided with a lateral
extension or air chamber open at the bottom for the admission of air for supporting
the flame and closed at the top.
For the purpose of adjusting the position on the wick tube of the combined
sleeve and air chamber I in one form provide the same with a lug forming a nut
for receiving an adjusting screw the stem of which latter passes through the lamp
oil well and at its lower extremity is fitted with a thumb nut for manipulating it.
A sleeve or tube is fitted in the lamp well for the spindle of said screw to pass
through; or the adjusting screw may pass through the side when instead of the
screw a rack and pinion or sector may be used.
"slit
"
The sleeve has a
for admitting the pricker to the wick at a point
corresponding with the slit in the wick tube.
D
1
Ը T
1005
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.
Improvements in Lamps, especially applicable as a Means for
Detecting the Presence of Gas in Mines.
I, WILLIAM OUTTERSON WOOD, of South Hetton, in the County of Durham,
Mining Engineer, 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 :-
My invention is applicable to all kinds of wick lamps and especially to oil
burning safety lamps such as are used in mines, and it provides a ready and reliable
means of reducing to any desired degree the flame without any risk of extinguishing
it thus rendering the latter, if desired, almost non-luminous, and consequently
specially suitable for detecting the presence of gas or fire damp in a mine.
Figure 1 of the accompanying drawing represents the lower part of a safety
lamp in elevation.
actional almantion and

page_text: As shown on the drawing the essential feature of the invention consists in the
application to the wick tube A of a sliding sleeve B adjustable thereon and formed
or provided with a lateral extension or air chamber B¹ closed at the top and,
when raised, open at the bottom for the admission of air for supporting the flame.
For the. purpose of adjusting the position on the wick tube A of the combined
sleeve and air chamber B B', I in the construction shown provide the same with a
lug or thickened part provided with, an internal thread and thus forming a nut for
receiving an adjusting screw D the stem of which latter passes through a sleeve or
tube E fixed in the top and bottom of the oil well or reservoir. The pricker F of
usual construction is also mounted in a tube or sleeve, F¹. The wick tube A is as
shown fixed to a base plate A¹ which has parts cut out or slots A³ A+ to allow of
the tubes E and F to project when it is in position. The lower end of the stem
of the screw D is fitted with a milled head D' or the like to permit of its being
revolved to cause the combined sleeve and air chamber B B to be raised and
lowered at desire. The screw D is kept in place vertically by means of the milled
head D' being fixed to the stem and by the screw itself being of larger diameter.
than the stem thus forming a shoulder which bears on the upper end of the
tube E.
Or instead of the adjusting screw D as before described there may be a vertical
rack fixed to the combined sleeve and air chamber:B B' which is operated by a
pinion, the spindle of which passes through the side of the reservoir. Or instead.
of the pinion a sector mounted on a similar horizontal spindle and be made to gear
with the aforesaid rack.
The sleeve B has a slit B2 for admitting the pricker F to the wick at a point
corresponding with the ordinary slit B³ in the wick tube A. In the construction
of lamp shown, the oil is put into the reservoir by first removing the combined
sleeve and air.chamber.B.B' and then the wick tube and base plate is removed and
the oil poured in the usual manner. Or the reservoir may be provided with a
separate opening closed by an ordinary screw.cap or stopper.
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 a lamp the employment of a combined sleeve and air chamber outside of
the wick tube and means for raising and lowering same on the wick tube
substantially as described.
2. In a miners or safety lamp the combination of a normally fixed wick tube A
and a combined sleeve and air chamber B B operated by an adjusting screw D
mounted in a tube E substantially as described and shown.
Dated this 27th day of February 1896
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.