Improvements in Sun-light Gas Lamps.
Year: 1890

page_text: Date of Application, 4th Dec., 1890-Accepted, 10th Jan., 1891
Improvements in Sun-light Gas Lamps.
I. THOMAS WILLIAM VAUGHAN, Gas Engineer, of 16 Kirby Street, Hatton Garden,
in the City of London, 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:-
The present invention relates to the construction and arrangement of sun-light gas
lamps suitable for theatres, lecture halls, and similar apartments, with the object of
improving their lighting capacity, and ensuring a proper consumption of the gas to
be burned.
In the accompanying drawing, I have illustrated a sun-light gas lamp embodying
my invention.
Fig. 1 is a side view, partly in section, and
Fig. 2 is an underneath plan view.
A is a metallic cone, lined internally with white enamel or other reflecting material,
and communicating by means of the flue a with the outer air; bis a baffle or deflector
situated within the cone in front of the fluo a, a short distance from the mouth
thereof, and adjustable by means of screws, so as to regulate the capacity of the flue
mouth.
C is the gas supply tube, preferably situated within the flue a, and separating into
two branches c c', leading to the ring tube c. d dare rings of gas jets projecting
from the tube towards the centre of the cone A, and delivering their flames close
to the internal surface thereof.
The rings of gas flames are illustrated in the drawing, but it will be evident that the
number of flames employed will be in accordance with the desired capacity of the sun-
light lamp.
The effect of placing the gas flames in close proximity with the cone, is a marked
improvement in lighting capacity, consequent, it is believed, on the more complete
combustion that results prior to the escape of the products up the flue. The presence
of the baffle plate b acts not only as a great reflector of light, but causes the escape
of the products of combustion to be retarded, and thereby a greater heating and more
perfect combustion thereof.
The existence of the flue permits of the escape of the poisonous vapours, and prevents
the atmosphere of the apartment from becoming oppressive.
On first lighting up the lamp, the cone being cold, the lighting capacity is merely in
accordance with the number and size of the flames, but after a few minutes a marked
improvement is manifest, evidently owing to the more perfect combustion of gas which
then takes place.
Should a very large quantity of light be desired, a number of cones arranged as
described may be placed together in a dome provided with a flue, with which the smaller
flues communicate.
The position of the gas supply pipe within the flue is not essential, but advantage is
derived from delivering the gas to be burnt in a heated state.
The delivery of the gas flames from a ring tube external to the cone, has the
advantage of avoiding all shadow, and of securing the whole interior of the cone as a
reflecting surface.

page_text: 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 :-
:-
A sun-light gas lamp constructed and arranged substantially as herein described
with reference to the accompanying drawing.
Dated this 4th day of December 1890.
NEWTON & SON,
Agents for the Applicant.