Improvements in Regenerative Gas Lamps.
Year: 1889

page_text: Date of Application, 27th June, 1889
Complete Specification Left, 27th Mar., 1890-Accepted, 3rd May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Regenerative Gas Lamps.
We, EDWIN FULLFORD, of 8 London Road, Clapton, Engineer, and HENRY
THEODORE VAN LAUN, of 101 Blenheim Crescent, London, Engineer, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to that description of gas lamps with inverted burners
known as regenerative lamps, in which the gas supply passes down a central tube or
passage to the burner while the air supply is led in contact with surfaces that are
heated by the flame and the hot products of combustion proceeding therefrom, a
portion of the air being made in some cases to pass down centrally through the
burner so as to issue through an orifice situated centrally below the flame.
According to one of our present improvements we construct such last named
central tubular air passage, with perforated enlargement or shield at the lower end,
in one piece with the forked gas passage leading down from the central gas pipe
above to an annular chamber surrounding the tubular air passage, through the
lower end of which chamber the gas supply issues to the flame.
The central part of the gas passage from which the fork branches, is arranged to
screw into the lower end of the gas supply pipe, and the lower ends of the forked
passage join on to a cylindrical enlargement on the central air tube, the upper end;
of which fits tight against the circular edge of the surrounding gas chamber so as
to close this at top, the gas passages being made to communicate through side holes
with the chamber.
Thus the central air tube together with the forked gas passage being formed in
one piece as described, this can be readily removed from the burner by unscrewing
it from the gas tube, so as to gain access to the parts for cleaning them.
According to another improvement we provide in the lower part of the cylindrical
air chamber surrounding the burner, one, two or more annular discs, having down-
ward directed rims so as to form narrow spaces between them, the said rims having
openings in them through which the air can enter the said spaces. The top disc fits
with its central hole close against the cylindrical gas chamber of the burner, and
above this may be fitted in the air chamber a perforated conical shield for uniformly
distributing the downward flowing air, which on passing through this shield finds
its way first through the openings in the rims into the narrow spaces between the
discs, and then through narrow circular spaces left between the inner edges of
the lower discs and the cylindrical gas chamber down to the flame of the burner.
Thus as the said discs become highly heated both by the radiated heat from the.
flame, and by the conducted heat from the gas chamber, the air supply will become
much more effectually heated before it reaches the flame than is the case with
existing arrangements.
According to another arrangement of the said discs they are made without the
said rims, but are kept a short distance apart by projections on their faces, and they
are made of such a size as to leave narrow spaces between their periphery and
the sides of the casing, through which the air passes into the spaces between the
discs as before.
When the central air supply is used with the burner as described, we prefer to
extend the central air tube down below the flame and to form on the lower end a
perforated enlargement, through which a uniform and regulated air supply will pass.
to the burner.
The above described arrangement of discs for heating the air supply can be
applied not only to the hereinbefore described construction of burner with central

page_text: air supply, but also to any other construction of burner with or without central
air supply.
Also the first described arrangement of combined central air supply and forked
gas passage may be used in combination with any other known arrangement for
heating the air supply:
Dated thin uzh
0 T
1000
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION. ·
Improvements in Regenerative Gas Lamps.
We, EDWIN FULLFORD of 8 London Road, Clapton, Engineer, and HENRY
THEODORE VAN LAUN of 101 Blenheim Crescent, 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 :-
Our invention relates to that description of gas lamps with inverted burners
known as regenerative lamps, in which the gas supply passes down a central tube or
passage to the burner while the air supply is led in contact with surfaces that are
heated by the flame and the hot products of combustion proceeding therefrom, a
portion of the air being made in some cases to pass down centrally through the burner
so as to issue through orifices situated centrally below the flame.
Lamps of the kind to which our present improvements relate are described in our
previous Specifications No. 2853 of 1888 and No. 7335 of 1888. The modifications
which form the subject of our present invention are represented in the accompanying
drawings, to which we now refer. Fig. 1 is a vertical section of one form of lamp
embodying our improvements. G is the gas supply pipe terminating in a circular
burner B from which flame issues horizontally outwards, bending upwards within a
hollow reflector ring R to the passages by which the hot products of combustion
pass up to the chimney C. Air entering by passages A, which cross the passages P,
passes down the central channel H through the perforations of a screen C and then,
through a number of perforations in the turned down lips of rings D to the flame.
These rings D instead of being made in one piece as shewn in Fig. 1, may be
separate rings placed one above another. The air thus supplied to the upper side
of the flame is highly heated by its contact with the walls of the passages con-
ducting away the hot products of combustion and also by its passage through the
heated screen C and heated rings D. Besides the air thus supplied to the flame
additional air enters the annular channel a and hollow reflector R and issues
through perforations of the reflector to supply the lower and outer side of the
flame, this air being also heated by its passage through a and R. The burner,
reflector and passages are enclosed within a glass globe K.
Fig. 2 is a vertical section shewing a modified construction of the central portion
of the lamp. As in Fig. 1 G is the gas pipe and B the burner, H is the central
channel for the descending air and P is the passage for the hot products of com-
bustion upwards. The perforated screen C and the perforated rings D are in this
case made in a form somewhat differing from that shewn in Fig. 1; the air finding
it's way through the perforations of Cinto an annular space & and thence through
the perforations of D. Fig. 3 is a vertical section of the central portion of the
lamp with the burner modified so as to admit of a central supply of heated air to
the underside of the flame. In this case, the gas from the pipe G by two or
more branches g enters an annular space K surrounding a central tube / and
issues thence by an annular mouth B₁ which constitutes the burner. The air from
the channel H passes partly through the perforations of C and D as in Fig. 2 to
the upper side of the flame, and partly between the branches 9 down the tube h
to a perforated head I, whence it issues heated to supply the underside of the flame,

page_text: The construction shewn in Fig. 3 is such that the central air tube
and the piece
containing the gas passages g can be readily taken out, giving access for cleansing,
without disturbing other parts of the lamp.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is
1. In a regenerative gas lamp, the combination of central burner B and the
perforated screens C and D, substantially as described with reference to Fig. 1.
2. The modified construction of the perforated screens C and D, substantially as
described with reference to Fig. 2.
h
3. In combination with the perforated screens C and D, the central air passage
with distributing head L, and the branches and annular passage K B¹ for gas,
substantially as described with reference to Fig. 3.
Dated this 27th day of March 1890.
ABEL & IMRAY,
Agents for the Applicants.