Improvements in Overhead Regenerative Gas Lamps.
Year: 1892

page_text: COMPLEIE DIEUITIATION.
Improvements in Overhead Regenerative Gas Lamps.
We, THE LAMP MANUFACTURING COMPANY LIMITED and ISAAC JOHN
COLLINS, of 12 & 14 Leonard Street, City Road, in the County of London, Lamp
Manufacturers, 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 relates to a construction of regenerative gas lamps of a kind to be
fixed in or suspended from ceilings overhead, and more especially applicable for use
in railway carriages when they are provided with suitable wind guards.
The accompanying drawings Figs. 1 and 2 are vertical sections of lamps according
to this invention adapted for a railway carriage, these lamps being substantially
the same in construction but having some of their details modified.
In both these figures similar reference letters are employed as far as possible to
indicate corresponding parts.
The central part of the lamp consists of the following parts:-a block A having
a hole a bored to its centre to form communication from the gas supply pipe A', a
pipe A leading down to a lower flanged piece A³ from which a tubular passage
leads down to the burner B.
The flange of A is pierced with holes which form communication from a space A*
above to a space A5 below. There are three or more horizontal triangular
passages A into the space A* from the surrounding casing and between these there
are a corresponding number of vertical passages A' from a space A surrounding A*
to a space above which forms the base of the chimney.
The burner B as shewn in Figure 1 is in the form of a metal cup B', having in its
upper face a groove in which is embedded a perforated ring B' of steatite or other
such suitable material as is commonly employed for gas burners. The burner B
shown in Figure 2 and to an enlarged scale in Figure 3 consists of a cup B* of
steatite or such like material having two tiers of lateral perforations separated by a
projecting flange B. As such a cup as B' is sometimes liable to crack and break,
an inner burner of metal B' is provided which can operate as a burner in case of the
outer burner B' breaking away.
The chimney may be simply a tube C¹ when the lamp is used in a room or other
sheltered position, but when it is exposed to air currents as in a railway carriage it
is shielded by an outer casing C terminating in a guard at the top which be
of the form C shewn in Fig. 1 or of the modified form C* shewn in Fig. 2.
may
The casing D terminates in a flange D' as shewn in Fig. 1 or rests on a flange D'
as shewn in Fig. 2 fixed to the ceiling D³ of the carriage. The glass globe G may
be of comparatively small size suspended from a reflecting ring Gas shewn in Fig. 1
or it may be of the large size shewn in Fig. 2. While the parts D D¹ or D³ G
and G remain fixed, all the rest of the lamp including the chimney wind guards
and shields for the air passages can be turned on a hinge H coinciding with the
joint of the gas pipe, so as to give access to the interior.
When it is turned down for use as shewn in the figures, it rests on a ring H¹ of
caoutchouc or other elastic packing material and is secured by a catch H. In the
lamp Fig. 1 the air for supplying the flame enters by perforations E under a guard E',
descends a space E³, part passes through holes E³ into a space E' and whence part
passes through holes E to escape at the top along with the products of combustion,
along with which also mix other currents of air entering by shielded holes C³.
holes E opening from the space E' give freedom for escape of some of the air
should there be at any time undue pressure in that space occasioned by external
currents.
The

page_text: Most of the air which passes through the holes E³ without escaping by the holes E
enters the space A by the lateral passages A descends through the perforations
in A to the space A whence it issues in a highly heated condition to supply the
upper side of the flame F which it deflect outwards."
Such of the entering air as does not pass through the holes E' descends through
holes E to a space E' and thence through holes E into the globe G to supply the
underside of the flame F. In the lamp Figure 2 the course taken by the air is
substantially the same except that by partitions and holes arranged as at E' it
is made to take a zigzag course to the space E' whence air can escape as at E' in
case of undue pressure but a considerable portion of the air enters A by the
passages A and another considerable portion descends through the holes E to the
space E' above a corrugated deflector G', and from this space it passes through
holes Es into the glass G.
The products of combustion ascend through the annular passage A'° to the space A
and thence through the vertical passages A7 to the chimney C. By these
products all the metal forming the passages for the entering air is highly heated,
and thus the air arrives at the flame at an elevated temperature so that there is
very complete combustion of the gas and consequently great brilliancy of the light
which is produced.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
-
1. A regenerative gas lamp having a central circular burner situated within a
glass globe under an inner annular passage for entering air surrounded by an outer
annular passage for issuing products of combustion, these two passages and their
respective inlets and outlets being arranged in close proximity in a block of metal
so that heat is imparted by conduction from the escaping products of combustion to
the air which is directed on the upper side of the flame and also to air passing
through other passages into the globe to supply the underside of the flame, sub-
stantially as described.
2. In combination with a lamp such as is above referred to, when it is used in
exposed situations, a set of guards or shields and partitions with perforations arranged
for admission of the air so that the air is forced to take a zigzag course on its way
to supply the flame and to pass through a chamber whence a portion can escape to
the chimney in case of undue pressure, substantially as described.
3. A circnlar burner consisting of a metal cup having in its upper face an annular
groove in which is fixed a perforated ring of steatite or equivalent material, sub-
stantially as described.
4. A circular burner consisting of a laterally perforated cup of steatite or
equivalent material with an inner perforated metal cup arranged to act as a burner
in case of the outer cup giving way substantially as described.
Dated this 27th day of October 1892.
דיד
ABEL & IMRAY,
Agents for the Applicants.