An Improved Roof Gas Lamp for Railway Carriages.
Year: 1893

page_text: Date of Application, 1st Dec., 1893
Complete Specification Left, 20th Aug., 1894-Accepted, 22nd Sept., 1894
PROVISIONAL SPECIFICATION.
[Communicated from abroad by EMILE PICARD. of 11, Rue Royale, Brussels,
Belgium, Engineer.]
An Improved Roof Gas Lamp for Railway Carriages.
I, HAROLD IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the.
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention to be as follows:-
This invention relates to a lamp suitable for being suspended from the roof of a
railway carriage having a reservoir of compressed gas for supplying the lamp. The
lamp is carried on a ring suspended from the ceiling by bent tubes one of which is
connected to the gas supply pipe on the roof of the carriage and is provided with a
stop cock. From the part of the ring to which this tube is attached a branch leads
inwards to a central tube which carries at its lower end four burners within a glass
basin the edge of which has a lip resting on the suspended ring. The ring also
carries a reflector which extends over the burners having holes through it through
which the products of combustion pass to a chimney above.
The lower part of this chimney is made of mica and within this part surrounding
the descending gas tube is a vertical cylinder having a reflecting surface for
reflecting through the mica such light as may pass through the holes of the reflector
below. An inverted hemispherical basin of opal glass, or having an ornamented or
frosted surface rests by its lower edge on the suspended ring, its upper edge nearly
meeting a casing which surrounds the chimney and which passes up through the
glass basin.
+
Air passes through shielded perforations of the casing above the glass into the
annular space between the chimney and the casing and a portion of the air passes
from this space through lower perforations of the casing into the space within the
inverted glass basin, whence air passes through perforations of the reflector near
its outer edge into the glass basin below to supply the flames. The chimney is
covered by a cap having lateral shielded perforations for escape of the products of
combustion, and an outspreading ornamental rosette conceals the upper part of the
chimney and its cap from view from below.
Dated this 1st day of December 1893.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Roof Gas Lamp for Railway Carriages.
I, HAROLD IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent Agent, 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 relates to a lamp suitable for being suspended from the roof of a
railway carriage having a reservoir of compressed gas for supplying the lamp. The
said lamp is shewn in vertical section on the accompanying drawings. The lamp
is carried on a ring A suspended from the roof by four bent tubes B, one of
which B¹ is connected to the gas supply pipe C on the roof of the carriage and is
.

page_text: provided with a stop cock D. From the part of the ring to which this tube is
attached a branch E E leads inwards to a central tube F which carries at its lower
end four burners G within a glass basin H the edge of which has a lip resting on
the ring A attached to the suspended ring A.
The ring also carries a reflector I which extends over the burners having a
central hole 1 through it through which the products of combustion pass to a
chimney JJ above of which the upper part J is supported by ribs P fixed to the
ring A.
The lower part J of this chimney is made of mica and rests on the reflector I
and within this part surrounding the descending gas tube is a vertical cylinder K
having a reflecting surface for reflecting through the mica such light as may pass
through the hole of the reflector below.
An inverted hemispherical basin L of opal glass, or having an ornamented or frosted
surface, rests by its lower edge on the suspended ring A, its upper edge nearly
meeting a casing M which surrounds the chimney and which passes up through the
glass basin. Air passes through shielded perforations M of the casing M above
the glass into the annular space between the chimney and the casing, and a portion
of the air passes from this space through lower perforations M2 of the casing into
the space within the inverted glass basin L whence air passes through perforations 12
of the reflector near its outer edge into the glass basin below to supply the flames.
The chimney is covered by a cap N having lateral shielded perforations N¹ for
escape of the products of combustion, and an outspreading ornamental rosette O
conceals the upper part of the chimney and its cap from view from below.
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 roof lamps for railway carriages, the combination of a ring A supported by
tubes B one of which constitutes the gas supply pipe, a lower glass basin H, and an
upper glass basin, both supported by the ring A, a tube E connecting the gas
pipe B with the central supply tube for the gas burners the reflector I having a
central hole 1 for the escape of products of combustion and lateral holes I² for the
entrance of air and the chimney JJ' the upper part J of which is of metal, while
the lower part J' is of mica, substantially as described.
2. In combination with the lamp referred to in the preceding claim, the use of
the reflecting cylinder K within the mica chimney J' substantially as described.
3. An improved roof lamp for railway carriages combined and arranged as herein
described with reference to the drawings.
Dated this 20th day of August 1894.
ABEL & IMRAY,
Agents for the Applicant.