Year: 1886

page_text: Date of Application, 13th Oct., 1886.
Complete Left, 22nd Jan., 1887.
Complete Accepted, 22nd Feb., 1887.
We SAMUEL CHANDLER Senior, SAMUEL CHANDLER Junior, and JOSIAH CHANDLER
of Central Works, Kennington Oval, in the county of Surrey, Gas Engineers, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the type of regenerative gas lamps or
lanterns hereinafter referred to, the object of our present invention being to improve
the construction of the lamp body and to increase the illuminating power of the lamp.
In lamps of the type to which this invention relates the flame is of a disc or saucer
shape partly supplied with air through a central supply tube placed in the chimney
and heated by the ascending products of combustion and the flame is enclosed in a
globe or glass which is attached to the base plate of the body. The body of the lamp,
which acts as a regenerator, has passages through it for the products of combustion
around which the incoming air passes and becomes heated. According to our invention
we surround these passages or tubes for the products of combustion with supplementary
passages or tubes through which the incoming air is drawn or conducted so that the
incoming air is brought into close contact with the heated passages and the regenera-
tive effect of the body is thereby greatly increased.
The central air supply tube terminates in a nozzle the lower end of which is tapered
leaving an opening at the bottom of such a diameter as to conduct the air directly and
forcibly onto the gas which issues from a burner which may be of the form described
in our prior Specification No. 3100, of 1886.
In the central air supply tube we sometimes place a ball of wire gauze or perforated
material through which the air passes into the nozzle and thence to the flame. The
other parts of the lamp may be of any ordinary construction.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicants.

page_text: Improvements in Regenerative Gas Lamps or Lanterns.
We, SAMUEL CHANDLER, Senior, SAMUEL CHANDLER, Junior, and JOSIAH CHANDLER,
of Central Works, Kennington Oval, in the County of Surrey, Gas 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:
This invention relates to improvements in the type of regenerative gas lamps or
lanterns hereinafter referred to, the object of our present invention being to improve
the construction of the lamp-body and to increase the illuminating power of the
lamp.
In lamps of the type to which this invention relates the flame is of a disc or saucer-
shape partly supplied with air through a central supply tube placed in the chimney
and heated by the ascending products of combustion, and the flame is enclosed in a
globe or glass which is attached to the base plate of the body. The body of the lamp,
which acts as a regenerator, has passages or tubes through it for the products of
combustion around which the incoming air passes and becomes heated.
According to our invention we surround these passages or tubes for the products
of combustion with supplementary passages or tubes through which the incoming air
is drawn or conducted, so that the incoming air is brought into closer contact with
the heated passages and the regenerative effect of the body is thereby greatly
increased.
The central air supply tube may with advantage terminate, in a tapered nozzle
which conducts the air to the gas issuing from the burner, which is preferably of the
form described in our prior specification No. 3100 of 1886.
In the central air supply tube we find it advantageous to place a ball of wire gauze
or perforated material through which the air passes into the nozzle and thence to the
flame. The other parts of the lamp may be of any suitable ordinary construction.
In order to enable our invention to be fully understood we will proceed to describe
the same by reference to the accompanying drawings in which figure 1. is a vertical
section of a regenerative gas lamp constructed according to our invention, and figure. 2
is a horizontal section on line A B of figure 1; figure 3 is a similar view to figure 1,
of a slightly modified form of the improved lamp. Similar letters of reference indicate
similar parts in all the figures of the drawings.
a, is the central air supply tube placed in the chimney and heated by the ascending
products of combustion; b, is the globe or glass which is attached to the base plate,
of the body and encloses the flame d, of the lamp d', are the passages or tubes for the
products of combustion through the body of the lamp which body acts as a regenerator;
the incoming air passes around the passages or tubes d', and becomes heated, the above
mentioned parts being usual in the type of lamps hereinbefore referred to.
Referring to figures 1 and 2, e, e, are the supplementary passages or tubes with
which according to our invention we surround the passages or tubes d, and through
which the incoming air is drawn or conducted in the manner and for the purpose
described. The upper ends of the tubes d', are secured in a plate, while their lower
ends are secured in the base plate c, which is preferably recessed as shown.
The plate g, supports the tubes e, at their lower ends, which, as shewn, open into a
short cylinder, secured to the plate g. The central air supply tube a, is supported

page_text: by the plates c and gj, is a tapered or conical nozzle placed at the lower end of the
central air supply tube a; k, is the opening at the bottom of the tapered nozzle; I, is
the burner which may be of any suitable construction, but preferably of the form herein-
before referred to and shewn clearly in figure 4 of the drawings which represents an
enlarged view of the said burner half in elevation and half in section; the burner 1, is
screwed to the lower end of the usual gas supply pipe m, is the ball of wire gauze
or perforated material which we sometimes with advantage place in the central air
supply tube a, through which ball the air is caused to pass into the nozzle j, and thence
to the flame.
04
The globe or glass b, is supported by a flange or rim thereon resting in a frame p,
which is hinged by a pin to a flange, on the recessed base plate e, and which can be
opened downwards on its pivot when a pivotted lever catch, which is provided on the
frame p, is released from a projection 7. The flange is perforated with holes s,
which provide for the admission of air direct to the interior of the globe or glass b.
The lamp is provided with a plate t, which is formed with a central opening u, in the
usual manner.
In this construction of lamp the products of combustion arising from the gas flame d,
pass upwards over the conical nozzlej, which in consequence becomes very highly
heated, then through the opening, and into the vertical tubes d', whence they escape
up through the chimney, as indicated by the arrows. Atmospheric air for supporting
the combustion of the gas, enters below the edge of the cylindrical casing h, and passes
up through the annular passages between the tubes d', and e, in which passages every
portion of the air becomes highly heated by being brought into intimate contact with
the tubes . From the upper ends of the tubes e, the air is then drawn downwards
through the ball n, by which it is still further heated, and finally passes through the
opening, in the lower end of the conical nozzle j, onto the gas flame d.
It will be readily understood that the advantages of our invention do not depend
upon the precise arrangements adopted for supporting the tubes or uniting the various
parts of the lamp. The arrangement, which we have devised as above, carries out our
invention in a manner which presents many advantages of construction, but such
construction may be varied without departing from the spirit of our invention.
Another advantageous construction which embodies our invention is represented in
figure 3. This lamp is similar to that herein before described and illustrated in
figures 1 and 2 with the exception that the tubes e, surrounding the tubes d', are
secured at their upper ends in a plate y, which is supported by the gas supply pipe m,
and is fixed to a cylindrical casing. Between the casing, and the outer casing a¹,
of the lamp body an annular passage is formed and the air which is drawn in as
hereinbefore described when referring to figures 1 and 2, under the edge of the
casing a, passes upwards through the said passage and thence down through the
tubes Ci and ball n, to the burner 7, in the manner hereinbefore described and illustrated
in figures 1 and 2.
Having now particularly described and ascertained the nature of our invention and
in what manner the same is to be performed, we declare that what we claim is :-
1. In regenerative gas lamps of the type to which this invention relates, the
combination with the passages or tubes for the products of combustion, of supple-
mentary passages or tubes surrounding the same and through which the incoming air is
drawn or conducted substantially as and for the purpose herein before described.
2. The improved regenerative gas lamp substantially as hereinbefore described.
3. The two several constructions of regenerative gas lamps hereinbefore described
and illustrated in figures 1 and 3 of the accompanying drawings.