Improvements in Regenerative Gas Lamps.
Year: 1892

page_text: Date of Application, 1st Dec., 1892
Complete Specification Left, 1st Sept., 1893-Accepted, 7th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Regenerative Gas 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:-
.
This invention has reference to regenerative gas lamps suitable for overhead
lighting as for example in railway carriages.
An object of my invention is to render the various parts readily accessible for
cleaning, and easily replacable without special adjustment each time, the construction
being such moreover as to obviate liability to mislaying of separate parts, and to
admit of utilising casings of lamps of other constructions when applying my
invention.
For these purposes a portion of the gas supply pipe, burner, air heating chamber
or chambers, and chimney are combined and arranged to turn on a hinge or joint.
The reflector may be so applied as to move with the above mentioned parts or it
may be made separately removable.
Various forms of bowl may be used.
To obviate the necessity of specially adjusting the parts when turned on the
hinge or joint into position for use, I construct the lower part of the chimney when
the reflector is made separately removable, with a separate part able to slide
relatively to the other part in such a manner that it shall rest upon the top of the
reflector when the combined parts are returned into position for use.
When the
reflector is connected with the other parts so as to move with them, I provide it
with a ring free to adjust itself in a vertical sense and adapted to rest upon the
rim of the bowl or upon a ledge or support or supports above that rim.
Dated this 1st day of December 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 Gas Lamps.
1, 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 :-
This invention has reference to regenerative gas lamps suitable for overhead
lighting, as for example in railway carriages.
An object of my invention is to render the various parts readily accessible for
cleaning, and easily replacable without special adjustment each time, the construc-
tion being such moreover as to obviate liability to mislaying of separate parts, and
to admit of utilising casings of lamps of other constructions when applying my
invention.
For these purposes a portion of the gas supply pipe, burner, air heating chamber
or chambers, and chimney are combined and arranged to turn on a hinge or joint.
The reflector may be so applied as to move with the above mentioned parts, or it
may be made separately removable.
L
1

page_text: In the accompanying drawings,
Fig. I is a vertical section, partly in elevation, showing the application of my
invention to the casing of an ordinary railway gas lamp so as to convert the same
into a regenerative gas lamp.
Fig. 2 is a part plan of the lamp, one half of the lamp head or cover being
removed and the chimney being shown partly in section.
1 is an air heating chamber or regenerator provided with a chimney 2 and with
a central gas pipe carrying a burner 4. These parts, which may be of any
suitable construction, are combined together so as to form practically one piece,
and the gas supply pipe 3 is connected with a lateral or horizontal portion 3ª
provided with a cock 3. This portion 3" is, according to this invention, hinged or
jointed at 5 to a support 6 so that the combined air regenerator, chimney and
portion 3, 3 of the gas supply pipe can be turned about such hinge or joint as a
centre. The support 6 is fixed to the lamp casing 7 upon which the horizontal
portion 3 of the gas supply pipe normally rests at 7, so as to support the air
regenerator and attached parts in position for use as shown, and the said support
has formed therethrough, a gas passage by which the gas supply pipe 3, 3 is placed
in communication with the main gas supply pipe 8.
9 is the reflector. In the example now being described, this reflector is connected
to the air regenerator 1 so as to move therewith, and in order to obviate the
necessity of specially adjusting the combined parts when turned on the hinge or
joint 5 into position for use, and so that the top of the lamp bowl 10 shall be closed
when the parts are in the closed position, I provide such reflector with an external
ring I that is free to adjust itself in a vertical sense and is adapted to rest either
upon the rim 10 of the bowl 10, or, as in the example shown, upon the ring 12
which serves to confine the said rim in place and which is secured within and to
the lamp casing 7. Furthermore by the use of this vertically adjustable ring 11,
should the thickness of the rims of successive lamp bowls with which the lamp may
be, from time to time, fitted, vary, the closure of the top of each particular bowl
will nevertheless be ensured when the combined parts are moved into the closed
position, without its being necessary to specially adjust the parts for each particular
bowl. The said ring 11 is prevented from leaving the reflector, when the same is
raised with the other parts, by pins or set screws 9º. 13 is the lamp head or cover
hinged to the casing 7 at 13, and provided with suitable air inlet passages 13º, and
with baffle plates 13 which assist in ensuring a steady flow of air to the
regenerator 1, to the exterior of which may be fixed, for a like purpose, a perforated
baffle plate 1*.
By the construction described and shown, it will be seen that the combined air
regenerator, chimney, and gas pipes 3, 3ª can, after turning back the lamp head
or cover 13, be easily and quickly turned upward and outward about the hinge or
joint 5 as a centre, so as to permit of access to any of the said combined parts, or
to the lamp bowl, for cleaning or other purpose, and that the said parts can be
afterwards easily and quickly replaced without special adjustment of the parts each
time they are replaced. Also that there will be no liability of any of the parts of
the lamp being mislaid, such as obtains with lamps the various parts of which are
separate from each other.
When the reflector 9 is made separate from the air regenerator, so as to be
separately removable, as in the example shown in vertical section in Fig. 3, the
regenerator is provided with a separate tubular part 1 able to slide thereon in such a
manner that when the combined parts are turned into position for use, it will be
free to adjust itself vertically, to suit the height of the top of the reflector, upon
which it will then rest so as to prevent direct communication between the air
space above the reflector and the bottom of the chimney at this point, thereby
obviating any necessity of specially adjusting the said combined parts for this
purpose when turned inward on the hinge or joint. The flanged upper portion 9*
of the reflector, 9, in this case rests upon the ring or ledge. 12, and in order to
prevent it lifting or rattling, as when used in a lamp for carriage lighting it may

page_text: be arranged to be secured in place by a bayonet or equivalent joint in a manner
that will be readily understood.
As will be easily understood, my invention can be readily applied to the conversion
of railway carriage gas lamps such as are at present in common use, and which do
not act on the regenerative principle, into regenerative gas lamps, all that it is
necessary to do for this purpose being to replace the reflectors and chimneys, and the
hinged or jointed gas supply pipe with which such lamps are ordinarily provided,
by the combined air regenerator, chimney, and hinged or jointed gas supply pipe
hereinbefore described, and a reflector that may be fixed to the other parts as in
Figs. 1 and 2, or be separate therefrom as in Fig. 3. Thus it will be seen that
the existing lamp casings, bowls and fixed gas pipes and connections already
secured to the roofs of railway carriages do not require to be moved or altered, so
that the conversion of the said ordinary gas lamps into regenerative ones can be
effected very quickly and at a comparatively small cost.
Having now particularly described and ascertained the nature of the 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 in which a portion of the gas supply pipe, the
burner, air heating chamber, or chambers, and chimney are combined and arranged
in such a manner that they can be turned on a hinge or joint so that the said
combined parts are easily removable for cleaning or other purposes and are easily
replacable without special adjustment of the parts each time they are replaced,
substantially as herein described.
2. A regenerative gas lamp constructed substantially as hereinbefore described
and shown in Figs. 1 and 2 of the drawings annexed, or modified according to
Figure 3.
Dated this First day of September 1893.
W. Lloyd Wise,
T. C. J. THOMAS.
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.