An Improvement in Railway Signal Lamps.
Year: 1891

page_text: Date of Application, 25th Feb., 1891
Complete Specification Left, 5th Aug., 1891-Accepted, 5th Sept., 1891
PROVISIONAL SPECIFICATION.
An Improvement in Railway Signal Lamps.
I, JOHN WOOD of Messrs. Silber and Fleming's Works, Beech Lane Barbican
in the County of London, Brass Finisher, do hereby declare the nature of this
invention to be as follows:-
"
--
It sometimes happens that the gas lamps used for railway signalling fail on
account of accident to the gas service or fittings, and consequently oil lamps,
which are known as ፡፡
emergency lamps are temporarily placed within the casings
of the gas lamps so as to serve until the gas service is restored. If the stop cock
for the gas burner of one of these lamps is not in such a case closed, then on the gas
being turned on again, it escapes into the casing occupied by the emergency lamp
and causes an explosion and destruction of the lamp and it may be of the casing.
The object of this invention is to provide against this danger, which is done in the
following manner. The emergency lamp is made as usual with a vertical tube
which fits freely over the gas jet pipe projecting up from the bottom of the casing,
which tube is closed at the top. According to the present invention a shoulder is
formed in this tube and a washer of caoutchouc or other suitable packing material
is fixed against this shoulder, so that when the emergency lamp is put in the casing
the gas jet pipe projects into the tube through the packing washer which prevents
passage of gas from the jet back through the tube into the casing. In cases where
the gas jet pipes for many signalling lamps are approximately of one height, a pad
of caoutchouc or other suitable packing material may be fixed in the upper part of
the tube with a spring behind it if necessary, so that the gas jet orifice is closed by
the pressure of this pad against it.
Dated this 25th day of Februare 1801
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in Railway Signal Lamps.
I, JOHN WOOD, of Messrs. Silber and Fleming's Works, Beech Lane, Barbican,
in the County of London, Brass Finisher, 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:-
It sometimes happens that the gas lamps used for railway signalling fail on
account of accident to the gas service or fittings, and consequently oil lamps, which
are known as emergency lamps" are temporarily placed within the casings of the
gas lamps so as to serve until the gas service is restored. If the stop cock for the
gas burner of one of these lamps is not in such a case closed, then on the gas being
turned on again it escapes into the casing occupied by the emergency lamp and
causes an explosion and destruction of the lamp and it may be of the casing. The
object of this invention is to provide against this danger, which is done as I will
describe referring to the accompanying drawing which is a vertical section partly
in elevation of the gas lantern with the emergency lamp in it.
The emergency
lamp E is made as usual with a vertical tube T which fits freely over the gas jet
pipe G projecting up from the bottom of the casing C and which tube is closed at
the top as indicated at t. According to the present invention, a shoulder is formed
in this tube and a washer W of caoutchouc or other suitable packing material is
fixed against this shoulder, so that, when the emergency lamp E is put in the
[Pin 1

page_text: casing C, the gas jet pipe G projects intothic tube T through the packing washer W
which prevents passage of gas-from, the jeu back through the tube into the casing.
In cases where the gas jet pipes for many signalling lamps are approximately of
one height, a pad of caoutchouc or other suitable packing material may be fixed
in the upper part of the tube with a spring behind it if necessary, so that the gas
jet orifice is closed by the pressure of this. pad against it, but I prefer generally to
employ the arrangement shewn in the drawing, as the washer. W serves to make a
tiglit joint for gas pipes of different lieights:
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 :-
In the tube of an emergency lamp which encloses the gas jet pipe, a washer or
packing preventing passage of gas into the lantern, substantially as described.
Dated this 5th' day of August 1891.
ABEL..& IMRAY,
Agents for the Applicant