Improvements in or connected with Gas Lamps.
Year: 1892

page_text: Date of Application, 24th May, 1892
Complete Specification Left, 24th Feb., 1893-Accepted, 8th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Gas Lamps.
We, JAMES HENRY PICKUP of Walmersley Road, Bury in the County of
Lancaster, Engineer and JAMES BYROM of Woolfold, Bury, aforesaid, Contractor
and WILLIAM RIGBY, Foreman in the employ of J. H. Pickup & Company
Limited, of Bury, aforesaid, Engineers do hereby declare the nature of this
invention to be as follows:-
This invention relates to the class of gas lamps in which a group of burners is
arranged beneath a reflecting surface, or dome, above which lamps are usually
used for overhead lighting, and are generally referred to as sun lights.
The object of this invention is to provide a lamp which is economical in con-
struction, and very efficient in action, the air currents passing in proximity to
the flames so as to give a very efficient utilization of the gas and illuminating
effect.
According to our invention the pipe by which the gas is supplied, terminates in
a chamber from which radiate the burners in an upward and outward direction.
Above the burners is a dome shaped reflector which has an upwardly curved rim
and secured to the centre of its inner side is a tubular or conical-shaped piece of a
size at its lower end, to fit the gas pipe; and of a size at its upper end to leave a
space between itself and the gas pipe, which space communicates with a continua-
tion thereof enclosed by a tube above the dome shaped reflector and attached
thereto, the gas pipe passing through a tube which fits around the said pipe and is
supported by wings from the inside of the tube above the dome shaped reflector.
The said tube may open into the apartment in which the lamp is used, or it
may be continued in a tube or passage, leading from the apartment so as to constitute
a ventilator.
In the upper and larger part of the tubular or conical-shaped piece, secured to
the inner side of the dome shaped reflector, as aforesaid, openings are made
immediately beneath the said reflector the said openings being preferably larger at
their upper than at their lower parts. These openings form the passages by which
the heated air, or gases from the lamp pass therefrom, and, owing to the shape of
the reflector, and the situation of these openings the air passes in proximity to the
flames in a direction, and manner which gives a very efficient illuminating effect.
Dated this 24th day of May 1892.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Gas Lamps.
We, JAMES HENRY PICKUP of Walmersley Road Bury in the County of
Lancaster Engineer and JAMES BYROM of Woolford Bury aforesaid Contractor
and WILLIAM RIGBY Foreman in the employ of J. H. Pickup & Co. Ltd. of
Bury aforesaid Engineers do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to the class of gas lamps in which a group of burners is
arranged beneath a reflecting surface or dome above which lamps are usually used
for overhead lighting and are generally referred to as sun lights."
The object of this invention is to provide a lamp which is economical in

page_text: construction, and very efficient in action the air currents passing in proximity to
the flames so as to give a very efficient utilization of the gas and illuminating effect.
We will describe this invention with reference to the accompanying drawing.
Figure 1 being an elevation with part of the reflector broken away and Figure 2 a
section.
According to this invention the pipe a by which the gas is supplied, terminates
in a chamber A from which radiate the burners a² in an upward and outward
direction. Above the burners a² is a dome shaped reflector B which has an
upwardly curved rim and secured to the centre of its inner side is a tubular, or
conical shaped piece of a size, at its lower end e to fit the gas pipe and of a size
at its upper end c² to leave a space between itself and the gas pipe, which space
communicates with a continuation thereof enclosed by a tube D above the dome
shaped reflector B and attached thereto, the gas pipe a passing through a tube E
which fits around the said pipe a and is supported by wings d from the inside of
the tube D above the dome shaped reflector. The said tube D may open into the
apartment in which the lamp is used, or it may be continued in a tube, or passage,
leading from the apartment so as to constitute a ventilator.
In the upper and larger part of the tubular or conical-shaped piece C secured to
the inner side of the dome shaped reflector B as aforesaid, openings ³ are made
immediately beneath the said reflector B the said openings being preferably
larger at their upper, than at their lower parts. These openings from the
passages by which the heated air, or gases, from the lamp, pass therefrom and
owing to the shape of the reflector B and the situation of these openings e³ the air
passes, in proximity to the flames in a direction, and manner which gives a very
efficient illuminating effect.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what
we claim is
A gas lamp constructed or arranged substantially as hereinbefore described and
shewn in the accompanying drawing.
Dated this 24th day of February 1893.
J. H. JOHNSON & CO.,
Agents.