Improvements in Regenerative Lamps.
Year: 1892

page_text: Date of Application, 24th Sept., 1892
Complete Specification Left, 24th July, 1893-Accepted, 16th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Regenerative Lamps.
I, THOMAS COOPER JOHN THOMAS of 5 Carlton Road, Finsbury Park, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention has reference to a construction of wind proof regenerative lamp in
which the gas or other combustible to be burnt is supplied through a supply pipe
arranged externally to the air regenerator and provided with a burner through which
the gas or other combustible issues at a point below the air regenerator which
receives its supply of air from a chamber the lower side of which is arranged to
form a reflector and the upper side of which is provided with air inlets so formed
and arranged as to break up and reduce the velocity of air passing therethrough to
the flame and thereby aid in preventing it injuriously affecting the burning of the
lamp. The combined air regenerator and air supply chamber together with the
chimney are arranged within a casing or lamp body that carries the lamp bowl and
also the lamp head which may advantageously be hinged or pivoted to it and be
provided with suitably arranged air inlet passages and baffle plates to assist in
ensuring a steady flow of air to the regenerator.
When the lamp is to be applied to the roof of a railway carriage & the lamp
bowl is fixed to the lamp casing so as to require to be cleaned from the outside of
the carriage, the combined air regenerator and air supply chamber are removably
mounted in the lamp casing, but when the bowl is carried by a removable ring so
that it can be removed from the interior of the carriage the combined air regenerator
and air supply chamber can be fixed in place.
The air inlets to the air supply chamber can be constructed in various ways.
Thus they may be in the form of truncated conical or cylindrical tubes above the
upper ends of which is arranged a baffle plate or another chamber provided with a
perforated side or sides. In another construction the top of the air supply chamber
has a number of holes punched in it from the under side so that the edges of the
holes extend upward, and above them is a baffle plate or a second air chamber as in
the previous arrangement.
In order to ensure a uniform distance between the air outlet at the bottom of the
air regenerator and the outlet or outlets of the burner notwithstanding variations in
the thickness of the rim of different lamp bowls upon which the combined
regenerator and air supply chamber rest, I construct the lower part of such air
regenerator separate from the upper part thereof and within which it can slide and
connect it with a central stem the lower end of which is adapted to rest upon the
burner below so that the vertically adjustable lower end of the air regenerator will
In some cases the stem
always be supported at the same height above the burner.
may be arranged to form a deflector against which gas or flame issuing from the
burner below impinges. The burner can be constructed in various forms.
Windproof regenerative lamps constructed as described are specially suitable for
use in railway carriages, and an important object of my invention is to enable a gas
lamp of the kind now commonly used in railway carriages, and in which the burner
is carried by a hinged or jointed gas supply pipe, to be readily and cheaply
converted into windproof regenerative lamps without interfering with the present
arrangement of gas supply pipes, and without disturbing the casing or lamp body
that carries the lamp bowl and to which the lamp head is hinged. For this purpose
I replace the combined reflector and chimney ordinarily employed in lamps of the
kind referred to, by a combined air regenerator, air supply chamber, reflector and

page_text: chimney of the construction hereinabove described, the air chamber, or part thereof,
being suitably formed to accommodate the gas supply pipe.
Dated this 24th day of September 1892.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Regenerative Lamps.
I, THOMAS COOPER JOHN THOMAS, of 5 Carlton Road, Finsbury Park, in the
County of Middlesex, 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 :-
My invention has reference to a construction of wind proof regenerative lamp in
which the gas or other combustible to be burnt is supplied through a supply pipe
arranged externally to the air regenerator and provided with a burner, through
which the gas or other combustible issues at a point below the air regenerator which
receives its supply of air from a chamber the lower side of which is arranged to
form a reflector and the upper side of which is provided with air inlets so formed
and arranged as to break up and reduce the velocity of air passing therethrough to
the flame and thereby aid in preventing it injuriously affecting the burning of the
lamp. The combined air regenerator and air supply chamber together with the
chimney are arranged within a casing or lamp body that carries the lamp bowl and
also the lamp head which may advantageously be hinged or pivoted to it and be
provided with suitably arranged air inlet passages and baffle plates to assist in
ensuring a steady flow of air to the regenerator.
When the lamp is to be applied to the roof of a railway carriage and the lamp
bowl is fixed to the lamp casing so as to require to be cleaned from the outside of
the carriage, the combined air regenerator and air supply chamber, are removably
mounted in the lamp casing but when the bowl is carried by a removable ring so
that it can be removed from the interior of the carriage the combined air regenerator
and air supply chamber can be fixed in place.
The air inlets to the air supply chamber can be constructed in various ways.
Thus they may be in the form of truncated conical or cylindrical tubes above the
upper ends of which is arranged a baffle plate. In another construction the top of
the air supply chamber has a number of holes punched in it from the under side so
that the edges of the holes extend upward, and above them is a baffle plate or a
second air chamber provided with a perforated side or sides.
In order to ensure a uniform distance between the air outlet at the bottom of
the air regenerator and the outlet or outlets of the burner notwithstanding
variations in the thickness of the rims of different lamp bowls upon which the
combined regenerator and air supply chamber rest, I construct the lower part of
such air regenerator separate from the upper part thereof and within which it can
slide and connect it with a central stem the lower end of which is adapted to rest
upon the burner below so that the vertically adjustable lower end of the air
regenerator will always be supported at the same height above the burner. In some
cases the stem may be arranged to form a deflector against which gas or flame
issuing from the burner below impinges. The burner can be constructed in
various forms.
Windproof regenerative lamps constructed as described are specially suitable for
use in railway carriages, and an important object of my invention is to enable a
gas lamp of the kind now commonly used in railway carriages and in which the
burner is carried by a hinged or jointed gas supply pipe, to be readily and cheaply
converted into windproof regenerative lamps without interfering with the present
arrangement of gas supply pipe and without disturbing the casing or lamp body

page_text: that carries the lamp bowl and to which the lamp head is hinged. For this purpose
I replace the combined reflector and chimney ordinarily employed in lamps of the
kind referred to, by a combined air regenerator, air supply chamber, reflector and
chimney of the construction hereinabove described, the air chamber, or part thereof,
being suitably formed to accommodate the gas supply pipe.
In the accompanying drawings,
Fig. 1 shows a vertical section of a windproof regenerative gas lamp constructed
according to this invention and specially constructed for use in a railway carriage
the ordinary bowl and jointed gas supply pipe being retained.
Fig. 2 shows the same partly in plan and partly in horizontal section on the
line xx
Fig. 1.
1 is the gas supply pipe; it is jointed at 1* so as to enable it to be turned either
into position for use within the glass bowl 2 or to be turned back out of the way
when it is required to clean the bowl. 3 is the lamp casing screwed as shewn to
the outer side of the carriage roof and provided at its under part with an inwardly
extending flange upon which the rim of the bowl 2 rests. A flanged ring 4 screwed
to the casing 3 retains the bowl 2 securely in place. 5 is the burner which is
provided with a circular row of outlet apertures so as to give a round flame; above
it is arranged a combined air regenerator and air supply chamber 6 from which it
receives its supply of air. 7, 7 are two concentric tubes; the inner one 7 which
is closed at its upper part forms the air regenerator proper and is in connection
with the air supply chamber (which is upwardly extended as shewn) by cross
tubes 9. The outer tube 7" is at its upper part connected to the chimney 8.
In order to ensure a uniform distance between the air outlet of the regenerator
and the gas outlet of the burner 5, so as to enable a combined air regenerator air
supply chamber reflector and chimney according to my invention to be used with
lamp bowls having different thicknesses of rim and with hinged gas supply pipes of
varying lengths the said air outlet is formed at the bottom of a tube 10 adapted to
fit into and be capable of endwise movement within the tube 7. The tube 10,
which is contracted at its outlet end is connected by means of a perforated plate 11
with a central stem 12, the recessed lower end of which rests upon an upwardly
extending part 5* of the burner 5. The central stem 12 extends upwardly through
a hole formed in the closed end of the tube 7*; the stem is provided at its upper
end with a nut 12b which prevents it and the parts attached to it becoming
disconnected when the chimney and attached parts are removed. The under side
of the air supply chamber 6 is formed as a reflector 13 and the upper side is
provided with air inlets in the form of upwardly projecting tubes 14 which may be
either cylindrical as shewn or conical; at a short distance above the upper ends of
these tubes is arranged a baffle plate 15 supported by distance pieces.150.
Instead of the air inlets to the supply chamber being in the form of tubes, the
top of the air supply chamber may, as shewn in Fig. 3, be formed with a number
of holes 14 so formed that the edges of the holes extend npwards, above them
being arranged an annular chamber formed with a closed top 14b and with
perforated sides 14°, or if desired in place of this chamber with perforated sides a
simple baffle plate may be employed as in the arrangement illustrated in Figs. 1
and 2. The air current is by these means broken up and its velocity reduced
during its passage to the flame as will be well understood. The removable
combined air regenerator and air supply chamber with the reflector and chimney
above described are supported by means of a flared lip formed at the upper edge
of the chamber 6 which rests upon the ring 4 as shewn, part thereof being cut
away at 16 to accommodate the gas supply pipe. The lamp casing 3 carries a lamp
bead or cover 19 which is hinged thereto at 19" and is provided with suitable air
intlet passages 19 and with baffle plates 20 which assist in ensuring a steady flow
of air to the regenerator. I prefer to employ the lamp head shewn, which is of
special construction and forms the subject of another application for Letters
Patent filed by me, but other forms of lamp heads may be employed.
When the lamp is in use air passes between the baffle plates 20 attached to the

page_text: lamp head entering the lamp through the perforations 19 as indicated by the
arrows (Fig. 1) flowing through the tubes 14 into the air supply chamber 6, which
acts as a preliminary regenerator; passing thence through the cross tubes 9 into
the tube 7, through the perforated plate 11 and sliding tube 10 to the burner.
The products of combustion ascend through the annular passage between the
tubes 7 and 7, passing between the tubes to the chimney and away through the
upper part of the lamp head as indicated by the arrows (Fig. 1). When it is
desired to clean the lamp bowl, the lamp head is turned back thus allowing the
regenerator and connected parts to be taken bodily out of the casing, separately
from the gas supply pipe, which can then be turned out of the way and the inside
of the bowl easily cleaned.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
:―
. 1. In a regenerative lamp, a combined air regenerator air supply chamber,
reflector and chimney whether the same be removably mounted in the lamp casing
or fixed in place therein said air supply chamber being provided with means for
breaking up and reducing the velocity of the air supply substantially as described.
2. In a regenerative lamp an air regenerator capable of being readily removed
from the burner and provided with a movable outlet tube connected with a stem
that rests upon the burner, the arrangement being such that the air outlet from the
regenerator when the same is in place always occupies the same position relatively
to the burner substantially as described.
3. In a regenerative lamp an air supply chamber the upper side of which is
provided with means for breaking up and reducing the velocity of air passing
therethrough substantially as described with reference to Figs. 1 and 2, or Fig. 3
of the accompanying drawings.
4. A regenerative lamp constructed and arranged substantially as described with
reference to Figs. 1 and 2, or modified as described with reference to Fig. 3 of the
accompanying drawings.
Dated this 24th day of July 1893.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.