Improvements in Regenerative Gas Lamps.
Year: 1890

page_text: Date of Application, 31st Dec., 1890
Complete Specification Left, 28th Sept., 1891-Accepted, 14th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Regenerative Gas Lamps.
1, THOMAS COOPER JOHN THOMAS, of No. 5 Carlton Road, Finsbury Park,
in the County of London, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to improvements in regenerative gas lamps and has
for object to render such lamps practically wind proof so that the flame can burn
steadily when the lamp is in the open air, or in a large covered, but otherwise open
space such as a market, railway station, or shed.
For this purpose the lamp is constructed with inner and outer air chambers
arranged outside the ordinary regenerator, and each provided with an annular air
passage, or with an annular row of air passages such passage or passages being of
gradually increasing cross sectional area as it or they extends or extend inward and
through which air flows on its way to the flame, the air inlet or inlets to the outer
chamber being protected by a wind guard. The passages are formed of sheet
metal so formed and arranged as to act as baffle plates.
According to one construction, the air chambers are annular and concentric and
the inlet openings to the outer one are formed in a plate that constitutes the bottom
of this chamber and carries a shade reflector or cover that protects the lamp bowl
from rain and also serves as a wind guard to shield the inlet openings, which are
within it. Within the outer chamber and above the air inlets are two downwardly
inclined annular plates so arranged as to leave an annular space between them of
gradually increasing width from bottom to top. Or instead of two annular plates,
one plate can be used stamped or bent to form an annular channel that is narrower
at the bottom than at the top and is perforated at the bottom; or an annular row
of inverted hollow truncated cones can be used if desired.
The inlet to the inner chamber may be formed by an annular plate inclined to the
outer wall of this chamber an annular space being left between the two of gradually
increasing cross sectional area from top to bottom.
Or the air inlets to the outer chamber may be at the side, or at the top of this
chamber and be formed by an annular row of hollow truncated cones having their
smaller ends outward and protected by a wind guard. The air inlet openings in the
top of the inner chamber may also be formed by a similar row of hollow cones
having their smaller ends uppermost. Or in lieu of cones, two annular plates
inclined to each other may be used to form the air inlet for either or both air
chambers.
A lamp constructed as hereinbefore described may be provided with an inverted
burner of the kind described in the Specification of my application for Patent
No. 3130 of 1890 and with one or more air tubes for conducting air from the inner
chamber to a central air tube that carries a guide for a stem carrying a deflector
and whence air can issue in an annular stream below the flame. The tube or tubes
also carries or carry a stem or projection to which a gallery for supporting the
lamp glass or bowl can be removably attached.
The burner proper is surrounded by an air heater and its gas chamber is
preferably fitted with a hollow truncated cone.
Dated this 31st day of December 1890.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Regenerative Gas Lamps.
I, THOMAS COOPER JOHN THOMAS, of No. 5 Carlton Road, Finsbury Park,
in the County of London, 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 :-
This invention has reference to improvements in regenerative gas lamps and has
for object to render such lamps practically wind proof so that the flame can burn
steadily when the lamp is in the open air, or in a large covered, but otherwise open
space such as a market, railway station, or shed.
For this purpose the lamp is constructed with inner and outer air chambers
arranged outside the ordinary regenerator, and each provided with an annular air
passage, or with an annular row of air passages such passage or passages being of
gradually increasing cross sectional area as it or they extends or extend inward,
and through which air flows on its way to the flame, the air inlet or inlets to the
outer chamber being protected by a wind guard. The passages are formed of sheet
metal so formed and arranged as to act as baffle plates.
In the accompanying drawings:
Fig. 1 is a vertical section of a wind proof lamp thus constructed.
1 & 2 are concentric inner and outer annular air chambers surrounding the air
regenerator 3. The outer chamber is furnished with air inlet openings 4 as shewn
at the left hand side of Fig. 1, formed in a plate 5, that constitutes the bottom of
this chamber and carries a shade, reflector or cover 6 that protects the lamp bowl 7
from rain, and also serves as a wind guard to shield the said inlet openings. 8 & 8"
are two downwardly inclined annular plates so arranged as to leave an annular
space 9 between them of gradually increasing width from bottom to top as shown at
the left hand side of Fig. 1 and in plan in Fig. 2. Or instead of two annular plates
arranged as shewn one plate 8b can be used, stamped or bent to form an annular
channel that is narrower at the bottom than at the top and is perforated at the bottom
as shewn in plan and cross section in Figs. 3 & 4 respectively. Or an annular row
of inverted hollow truncated cones 8° can be used if desired, as shewn in plan and
cross section in Figs. 5 & 6 respectively.
The inlet to the inner chamber may be formed by an annular plate 10 carried
by a cover 11, and inclined to the outer wall 12 of this chamber so as to leave an
annular space 13 between itself and this wall of gradually increasing cross sectional
area from top to bottom.
Or the air passages to the outer and inner chambers may be at the tops of
these chambers as shewn in full lines at 8 & 10 respectively at the right hand
side of the centre line of Fig. 1, the air passage for the outer chamber being
protected by a wind guard 14. Or the outer passage and its wind guard may
be placed at the side of the outer chamber as shewn in dotted lines. These
passages 8 & 10 may be each formed of two annular plates arranged as shewn:
or of one perforated plate stamped to shape, like that shewn in Figs. 3 & 4;
or an annular row of cones like those shewn in Figs. 5 & 6 may be used, the
smaller end of each passage being uppermost or outermost in each case. By
this construction air entering the lamp casing rapidly, will, as it flows through
the air passages described, have its velocity gradually decreased so that it will
flow gently and uniformly to the flame.
A wind proof lamp constructed as hereinbefore described may be advantageously
provided with an inverted burner of the kind described in the Specification of my
application for Patent No. 3130 of 1890.
The burner shewn comprises a burner tube 15 with perforated transverse
diaphragm 16 carrying a stem 17 with deflector 18. It is secured to a perforated
plate 19 that forms the top of an air heater 19" and is secured to the lower end

page_text: of the gas supply pipe 20. Within the gas chamber 21 of the burner is arranged
a hollow truncated cone 22 that serves to separate dust from the entering gas and
allow the gas to expand and flow uniformly through the perforated diaphragm 16.
The lamp may also be provided with one or more air tubes 23, (two in the example
shewn) for conducting air from the air chamber 1 to a central air tube 24 that
surrounds an extension 17" of the stem 17. From this tube 24 air will issue in an
annular stream below the flame, the shape of which will consequently be determined
by the joint action of the air upon its upper and lower sides. The air tube 24
carries a guide 25 for the extension 17. The tubes 23 also carry a stem 26 to
which the gallery 27 for supporting the lamp bowl 7 can be removably attached
by a screw 28. Holes are provided in the ring or plate 5 and in the reflector 29
to admit air to the inner side of the lamp bowl as well understood. The lamp head
may be of any suitable form, as for example that shewn.
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. A regenerative gas lamp constructed with inner and outer air chambers
arranged outside the regenerator or chamber wherein air is heated and each
having an annular air passage, or with an annular row of air passages of
gradually increasing cross sectional area as it or they extends or extend inward
and through which air can flow on its way to the flame, the air inlet or inlets
to the outer chamber being protected by a wind guard substantially as herein-
before described with reference to the drawings annexed for the purpose specified.
2. The combination and arrangement of parts forming my improved regenerative
gas lamp with inner and outer air chambers arranged outside the ordinary regene-
rator and with air supply to the upper and lower sides of the flame substantially as
described and shewn.
Dated this 28th day of September 1891
W. Lloyd Wise,
T. C. J. THOMAS.
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.