Improvements in Self Contained Gas Fired Steam Generators.
Year: 1891

page_text: Date of Application, 3rd Mar., 1891
Complete Specification Left, 3rd Dec., 1891-Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Self Contained Gas Fired Steam Generators.
We, GEORGE HENRY TAYLOR, of 69 Chancery Lane, in the County of
Middlesex, Engineer, and WILHELM OTTO AXEL LOWE, of 10 Dale Street,
Liverpool, in the County of Lancaster, Merchant, do hereby declare the nature of
this invention to be as follows :-
This invention relates to improvements in that class of gas fired steam generators
in which the gases are led from the producer to the combustion chamber by means
of downtakes, as is described in the Specifications of the Letters Patents granted
to the said George Henry Taylor, No. 137334 and No. 76338.
According to the present invention such downtakes may be dispensed with, and
the producer, together with its uptake, are surrounded with an enveloping hollow
jacket chamber, or casing into the upper end of which the gases, generated in the
producer, are led, and down which they are conducted into the combustion
chamber, where ignition and combustion take place, as is well understood.
A water space is left between this enveloping hollow jacket, chamber, or casing
and the producer and its uptake, which space is, by means of suitable passages or
openings formed through the enveloping hollow jacket chamber or casing in free
communication with the surrounding water contained in the boiler so as to ensure
perfect circulation as well as to permit of the escape of steam into the surrounding
water in the boiler.
If preferred, the interior surfaces of the cylindrical hollow jacket, chamber or
casing may be lined with fire brick. That portion of the enveloping hollow
chamber which enters the combustion chamber is water jacketed.
By this invention we are enabled to present a larger heating surface to the
water in the boiler, thereby greatly enhancing the effective working of the
generator.
ERNEST DE PASS,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Self Contained Gas Fired Steam Generators.
We, GEORGE HENRY TAYLOR, of 69 Chancery Lane, in the County of
Middlesex, Engineer, and WILHELM OTTO AXEL LOWE, of 10 Dale Street,
Liverpool, in the County of Lancaster, Merchant, 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, reference being had
to the accompanying drawings and to the letters and figures marked thereon, that
is to say -
This invention relates to improvements in that class of gas-fired steam generators
in which the gases are led from the producer to the combustion chamber by means
of downtakes, as is described in the Specifications of the Letters Patents granted
to the said George Henry Taylor, No. 13733, and No. 7633.
According to the present invention such downtakes may be dispensed with, and
the producer, together with its uptake, be surrounded by an enveloping hollow
chamber, jacket, or casing, into the upper end of which the gases, generated in the
Price &

page_text: producer, are led, and down which chamber, jacket, or casing, they are conducted
into the combustion chamber, where ignition and combustion take place, as is well
understood.
A water space is left between this enveloping hollow chamber, jacket, or casing,
and the producer and its uptake, and this space is, by means of suitable
passages or
openings formed through the enveloping hollow chamber, jacket, or casing, placed
in free communication with the surrounding water contained in the boiler so as to
ensure perfect circulation, as well as to permit of the escape of steam into the
surrounding water in the boiler.
If preferred the interior surfaces of the cylindrical hollow chamber, jacket, or
casing, may be lined with fire brick. That portion of the enveloping hollow
chamber which enters the combustion chamber is water jacketed.
And in order that our invention may be fully understood and readily carried
into effect, we will describe the same with reference to the accompanying
drawings.
Figs. 1 and 2 are vertical sections, taken at right angles to each other, showing
our improved steam generator.
Figs. 3 and 4 are horizontal sections taken respectively on the lines A. A and B B
of Fig. 2.
The course taken by the gases and air is indicated by arrows; the full arrows
representing gases, and the dotted ones, air.
a is the gas producer furnace, into which fuel can be charged from the feed
hopper b, through the inclined passage c. d is the central uptake or flue up which
the producer gases ascend and enter the enveloping hollow chamber, jacket, or
casing e, by the passage d. The said hollow casing entirely surrounds the central
Hlue or producer furnace, and constitutes an annular downtake for conveying the
gases down to the combustion chamber f, to which they gain admission through
the apertures or gas inlets f (Fig. 2).
Between the hollow casing or annular downtake e, and the central flue and
producer furnace, an annular water space g is left, which is in free communication
with the main body of water contained in the boiler by means of the passages or
circulating tubes e so that good circulation is ensured."
The inner wall of the combustion chamber is separated from the outer wall e²
of that portion of the annular downtake surrounding the producer furnace, by an
annular water space h, which, like the water space g, is also in free communication
with the main body of the water, through its upper portion at which is open to
the boiler.
The outer wall of the combustion chamber is provided with air passages f
(Fig. 2) into and along which the air necessary for combustion passes, and enters
in a heated state the combustion chamber through the inlets, where it meets
and admixes with the producer gases arriving by the apertures or gas inlets f
The combusted gases are led from the combustion chamber to the waste heat
box, by the fire tubes j, and these gases after parting with most of their heat to
the surrounding water, escape through the short passage k, and finally reach the
chimney (Fig. 1).
Gusset stays e³, e³, and i, i, rigidly connect the annular downtake e and the
waste heat box i to the shell of the boiler, while bolt stays m situated within
the annular water spaces 9 and give additional strength to these parts. If
preferred, the before mentioned bolt stays may be dispensed with, in which case
the said flues and jackets g and h will be formed of corrugated metal, so as to
ensure the requisite strength. Suitable cleaning holes are provided for obtaining
access to the water jackets, as well as other parts of the generator.
According to this construction of generator we arrange the producer furnace,
the central Hue, the annular downtake, the waste heat box, and the whole of the
fire tubes, so that they are entirely surrounded with the water in the boiler and
consequently an enormous heating surface is available, and at the same time we
provide ample provision for free circulation of the water.

page_text: Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. In self-contained gas-fired steam generators, the employment of an annular
downtake, chamber, or casing, into which the gases from the producer are led, and
by which they are conveyed to the combustion chamber, said downtake being so
arranged as to surround or envelop the gas producer furnace and its central Hue,
and to form an intervening annular water space (such as g) between itself and the
producer and its central flue, and which water space is in free communication with
the water in the boiler by means of suitable circulating tubes or passages, sub-
stantially as described.
2. In self-contained gas-fired steam generators in which an annular gas downtake
surrounds or envelopes the producer furnace and its central flue so that an annular
water space (such as g) intervenes, arranging a second annular water space (such
as ) between the combustion chamber and that portion of the gas downtake which
surrounds the producer furnace, and which annular water space is open to the water
in the boiler, substantially as described and shown.
3. Our improved self-contained gas fired steam-generator having its parts
arranged and combined substantially as hereinbefore described and shown by the
annexed drawings.
ERNEST DE PASS,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicants.
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