Year: 1888

page_text: . Date of Application, 17th May, 1888
Complete Specification Lett, 18th Mar., 1889
Complete Specification Accepted, 11th May. 1889
We, EDWIN FULLFORD, of 8, London Road, Clapton, and HENRY THEODORE
VAN LAUN, of 172, Lancaster Road, in the County of Middlesex, Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention relates to what are known as regenerative lamps, in which air
is supplied to the flame after having been first heated in passing through the
lamp.
In such lamps, (supposing them to be suspended from or under the ceiling of a
room to be lighted) the gas is admitted down a central supply pipe to a suitable
burner at its lower end, and the first part of our invention consists in the intro-
duction of a small central tube into and concentric with such supply pipe, the lower
end of this smaller pipe being connected with the burner and its upper end after
being carried up to a sufficient height being open. By this novel method of
arrangement the gas in the central tube is kept cooler and travels at a greater speed
than when it passes along a larger tube, and is less liable to deposit carbon in
the pipe.
The small tube may be provided with an inner wire or cleaning device which may
be attached to the burner so that by removing the latter the wire can be used to
clean and remove any deposit from the interior of the tube.
Another part of our invention relates to a novel method of closing the apertures
through which the external air is admitted before being heated in its progress to the
flame which it supplies. When it is required to light such a lamp, the gas is turned
on to the supply pipe, and the lower glass globe or bowl below the flame is opened
by releasing the hinged frame in which it is carried, for the purpose of lighting the
gas, in doing which an explosion of greater or less force is likely to occur.
By our present improvement, we make the external concentric tube or chamber
of the regenerative chamber and the chimney attached to it capable of turning
laterally for a sufficient distance round the inner air tube or chamber through which
air passes down round the gas supply pipe to the burner, the external tube having a
sufficient number (preferably three) of lateral passages through it which in one
position communicate with corresponding openings in the sides of the central air
tube or chamber; 'the spaces between the lateral passages being free for the passage
of the heated air and products of combustion to the chimney, whilst when moved
round into its other position the inner ends of the three or other number of lateral

page_text: passages come opposite to the unperforated part of the inner air tube or chamber or
preferably opposite to recesses in the said tube or chamber open above, so that
the air supply is diverted through them into the chimney, whilst at the same time the
perforations in the said inner tube or chamber come opposite to openings into the
spaces between the three or other number of lateral passages, through which openings
the heated products of combustion are diverted so that they pass freely up through
the chimney. In this position the globe or bowl may be sufficiently opened without
danger of serious explosion in order to light the gas.
In some cases instead of turning the external tube and chimney round as described
for the purpose of regulating the air passages they may be raised or lowered for
the same purpose, so that when lowered the air passages communicate with the
perforations through the inner tube or chamber, whilst when raised the latter
communicate with the chimney and the gas issuing from them can be ignited. The
top of the inner tube or chamber may be made so low that in this position the inner
ends of the transverse air passages come above its top and communicate directly
with the chimney, into which the entering air is accordingly diverted.
The outer tube and chimney can either be raised or lowered by hand, or they
can be connected with the hinged frame which carries the transparent bowl or
dish.
Another of the improvements which form the subject of our present invention
consists in arranging an intermediate tube communicating below with the space
round the burner and open above, round the central gas pipe between the latter and
the inner air tube or chamber, the perforations through the latter and the corresponding
passages and openings through the outer moveable tube being arranged as low
down as possible so that the air entering the inner chamber has to pass up outside
the intermediate tube and over its edge before descending it to the flame. In this
way the air is more thoroughly heated in its passage and the possible return of
unconsumed gas through the air openings is prevented.
.
It is advisable that the walls of the lateral passages through which the air passes
as described to the inner tube or chamber should be of no great thickness, so that the
air passing through them may be the more readily heated by the heated products of
combustion passing round and between the passages to the chimney.
Where it is necessary to open the frame carrying the glass or transparent bowl or
dish, the fastening of the latter has to be released by a hook or rod and the frame
and bowl are then liable to fall suddenly as they are unsupported, and it is not easy
to lift and close them again. In order to remedy this objection, we prefer to use a
double ended lever hinged to the frame on the opposite side to the hinge upon
which the latter turns. The outer end of this lever is weighted and provided with
a ring or hook by which it can be easily raised, and its inner end is formed with a
hook or detent engaging with a corresponding plate or catch upon the fixed body of
the frame against which the frame closes. When therefore the frame is raised it
becomes automatically fastened by the hook or detent, whilst to lower it the outer
or weighted end of the lever is raised by a suitable rod or instrument and the
fastening is released, the frame and glass remaining supported upon the rod without
falling open.
In a very simple form of lamp, the external tube and chimney are not moveable
either laterally or vertically, the air passages passing through the external tube and
through the inner tube or chamber, and the heated products of combustion passing
up to the chimney between the tubes and through the spaces between the lateral
passages.
تحد
1***
1000
EDWARDS & Co.,
35, Southampton Buildings, London,
Agents for the Applicants.

page_text: Improvements in Gas Lamps.
We, EDWIN FULLFORD, of 8, London Road, Clapton, and HENRY THEOdore
VAN LAUN, of 172, Lancaster Road, in the County of Middlesex, Engineers,
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, and accompanying drawings, that is to say:—
Our invention relates to what are known as regenerative gas lamps, in which
air is supplied to the flane after having been first heated in passing through the
lamp.
In such lamps, (supposing them to be suspended from or under the ceiling of a
room or other place to be lighted) the gas is admitted down a central supply pipe
to a suitable burner at its lower end, and the first part of our present invention
consists in the introduction of a smaller central tube into and concentric with such
supply pipe, the lower end of this smaller pipe being connected with the burner
and its upper end after being carried up to a sufficient height being open.
In the accompanying drawings which are in illustration of our invention, figures 1
and 1" shew this arrangement, a being the gas supply pipe the lower end of which is
closed, and the smaller central pipe the lower end of which communicates with the
burner b, whilst the gas is admitted to its upper end which is open, either through
the end as shewn in figure 1 or through lateral holes as shewn in figure 1.
By this novel method of arrangement the gas in the central tube a is kept cooler
and travels at a greater speed than when it passes along a larger tube, and is less
liable to deposit carbon in the pipe. The small tube v may be provided with an
inner wire or cleaning device (not shewn in the drawing) which may be attached
to the burner so that by removing the latter the wire can be used to clean and
remove any deposit from the interior of the tube a.
Another part of our invention relates to a novel method of closing the apertures
through which the external air is admitted before being heated in its progress to
the flame, which it supplies. When it is required to light such a lamp, the gas
is turned on to the supply pipe a and the lower glass globe or bowl c below the
flame is opened by releasing the hinged frame w in which it is carried, for the
purpose of lighting the gas, in doing which an explosion of greater or less force is
likely to occur.
By our present improvement (as illustrated in Figures 1, 2, and 3), we make the
external concentric tube or chamber of the regenerative chamber and the chimney e
attached to it, or the inner tube or chamber a, capable of turning laterally for a
sufficient distance round the air tube or chamber through which air passes down
round the gas supply pipe a to the burner b.
The external tube has a sufficient number (preferably three) of lateral passages d
through it which communicate with corresponding openings in the sides of the
central air tube or chamber n in one position of the latter, the spaces between the

page_text: lateral passages d being free for the passage of the heated air and products of
combustion to the chimney e whilst when the tube n is turned round to its other
position the inner ends of the three or other number of lateral passages d come
opposite to the unperforated part of the inner air tube or chamber # or preferably
opposite to recesses 1 in the said tube or chamber open above as shewn, so that the
air supply is diverted through them and through openings 3, into the chimney e,
whilst at the same time the perforations in the said inner tube or chamber n come
opposite to openings 2 into the spaces between the three or other number of
lateral passages d, through which openings the heated products of combustion or
gas from the burner are diverted so that they pass up through the chimney e. In this
position the globe or bowl c may be sufficiently opened without danger of serious
explosions in order to light the gas.
d
o is a handle or lever by which the tube n is turned partly round as described.
In some cases instead of turning the tube n or the external tube and passages d
and chimney e round as described for the purpose of regulating the air passages, the
tube and passages d with the chimney e, may be raised or lowered for the same
purpose (as illustrated in figures 4 and 5), so that when lowered the air
passages
communicate with the perforations through the inner tube or chamber f, whilst when
raised (as shewn in figure 5) the latter openings communicate with the chimney e
through the openings 5, and the gas issuing from them from the burner can be
ignited.
The outer tube and chimney can either be raised or lowered by hand, or they can be
connected with the hinged frame which carries the transparent bowl or dish.
The top of the inner tube or chamber may he made so low (as shewn in figure 5)
that in this position the inner ends of the transverse air passages d are above the
top of the chamber fand communicate directly with the chimney e into which the
entering air is accordingly diverted.
Another of the improvements which forms the subject of our present invention
consists in arranging an intermediate tube 4 (figures 1, 2, 3, 4, and 5) communicating
below with the space round the burner and open above, round the central gas supply
pipe a between the latter and the inner air tube or chamber f, the perforations
through the latter and the corresponding passages and openings through the outer
moveable tube containing the passages d being arranged as low down as possible so
that the air entering the inner chamber through the passages d has to pass up
outside the intermediate tube 4 and over its edge before descending it to the flame.
In this way the air is more thoroughly heated in its passage and the possible return of
unconsumed gas through the air openings prevented.
It is advisable that the walls of the lateral passages through which the air passes
as described to the inner tube or chamber should be of no great thickness, so that the
air passing through them may be more readily heated by the heated products of
combustion passing round and between the passages to the chimney. is a hollow
reflector into which air enters through openings and passes out outside and
underneath the flame through openings by which air is supplied to the flame.
In such lamps where it is necessary to open the frame carrying the glass or
transparent bowl or dish e, the fastening of the latter has to be released by a hook
or rod and the frame and bowl are then liable to fall suddenly as they are unsup-
ported, and it is not easy to lift and close them again. In order to remedy this
objection we prefer to use a double ended lever A, as shewn in figure 6, hinged to
the frame w on the opposite side to the hinge upon which the latter turns.
The outer end of the lever A is weighted at C and is provided with a ring or
hook as shown by which it can be easily raised, and its inner end is formed into a
hook or detent engaging with a corresponding plate or catch B upon the fixed body
of the flange against which the frame, we closes. When therefore the frame wis
raised it becomes automatically fastened by the hook or detent, whilst to lower it
the outer or weighted end of the lever A is raised by a suitable rod or instrument
and the fastening released, the frame w and glass c remaining supported upon the
rod without falling open.

page_text: This arrangement is shewn somewhat modified in figure 7, in which the lever A
is pivotted at its inner end to a bracket upon the frame w, the inclined catch or
detent upon it being turned down and engaging with the flange as shewn. The
catch is released by being raised by the ring or hook at its weighted end c.
In a very simple form of lamp neither the external tube and chimney nor the
inner tube or chamber are moveable either laterally or vertically, the air passages
passing through the external tube and through the inner tube or chamber, and the
heated products of combustion passing up to the chimney between the tubes and
through the spaces between the lateral passages.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In regenerative gas lamps, the inner small gas pipe v, having one or more
openings for the admission of gas at its upper end, and communicating at its lower
end with the burner, substantially as described and shown.
2. The combination of the chamber containing air passages d, the concentric tube
or chamber n with or without openings communicating with recesses 1, and the
openings 2 and 3 in the outer chamber, either the tube or chamber n or the external
chamber and passages d with the chimney e being capable of moving round laterally,
substantially as described and shewn in figures 1, 2, and 3.
3. The combination of the chamber containing air passages d and capable of being
raised or lowered, the concentric tube or chamber having openings communicating
with the air passages d when the latter are lowered as shewn in figure 4, and with
the spaces between the air pasages d when the latter are raised as shewn in
figure 5, substantially as and for the purposes described and shewn in figures 4
and 5.
4. The combination of the chamber and air passages d, the inner chamber, and
holes, admitting air from the hollow reflector to the flame, substantially as
described and shewn.
5. The inner tube 4 communicating at its lower end with the space round the
burner, and open above, in combination with the external tube or chamber and the
air passages, substantially as and for the purpose described and shewn.
6. In regenerative gas lamps, the fastening for the frame carrying the transparent
globe, consisting of a lever pivotted to the frame and weighted at its outer end,
and having at its inner end a catch or detent engaging with the flange of the lamp,
so that to open the frame the outer end of the lever is raised by a hook or rod
which disengages the catch without allowing the frame to fall open, whilst to
close the frame it is raised by direct pressure from below when the catch becomes
automatically fastened, substantially as described and shewn in figures 6 and 7.
7. The combination of the fixed chamber containing air passages such as d
communicating with the inner tube, and spaces between the said air passages
communicating with the chimney substantially as described.
DL
1011 1
L 1000
EDWARDS & Co.,
35, Southampton Buildings, London, W.G.,
Agents for the Inventors.
EDWARDS & Co.,
35, Southampton Buildings, London, W.C.,
Agents for the Inventors.