Improvements in Self-contained Gas-fired Steam Generators.
Year: 1889

page_text: Date of Application 18th Sept., 1889
Complete Specification Left, 17th June, 1890-Accepted, 13th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Self-contained Gas-fired Steam Generators.
I, GEORGE HENRY TAYLOR, of 2 Molyneux Place, Liverpool, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
My present invention relates to improvements in self-contained gas-fired steam
generators described in my Complete Specification No. 7633, dated 24th May 1888,
and refers more particularly to the steam generating portion thereof, whereby I am
enabled to prevent the loss of the waste heat radiating from the heat box and to utilize
such heat for the purpose hereinafter mentioned.
In the specification above referred to, I described an arrangement of self-contained
gas-fired steam, generator in which the gases arising from the generator were led by
a vertical uptake into cross tubes passing through a waste heat box; such waste' heat
box was located in such a manner that it, and the upper portion of the flue tubes, were
always above the water level, and becoming excessively hot caused great loss of heat
by radiation.
Now, according to my present improvements, I so arrange the waste heat box, and
the flue tubes communicating therewith, that they are always below the level of tho
water, consequently instead of losing the heat, as before, by radiation, I now utilize
such heat to heat the surrounding water, thereby greatly adding to the efficiency of the
steain generator as well as tending to keep the cross tubes and descending branch
pipes at a much lower temperature, thus preventing the rapid deterioration thereof.
Dated this 18th day of September 1889.
ERNEST DE PASS,
68, Fleet Street, London, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Self-contained Gas-fired Steam Generators.
1, GEORGE HENRY TAYLOR, formerly of 24 Molyneux Place, Liverpool, in the
County of Lancaster, but now of 5 Bow Lane, in the City of 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, reference being had to the accompanying drawings and to the letters
and figures marked. thereon, that is to say :-
My present invention relates to improvements in self-contained gas-fired steam
generators described in the specifications of my British Letters Patents No. 13,733
dated 17th October 1884, and No. 7633 dated 23rd March 1888, and has reference
more particularly to the steam generating portion shewn with reference to Fig. 5 of
the specification of Patent No. 13,733 of 1884, and Fig. 6 of the specification of
Patent No. 7633 of 1888, whereby by the improvements about to be described I am
enabled better to utilize the heat radiating from the waste heat-box for the purpose
hereinafter mentioned.
In the specifications above referred to I described an arrangement of self-contained
gas-fired steam-generator in which the gases arising from the producer were led by a
vertical uptake into cross tubes passing through the waste heat-box and thence to the
combustion chamber wherein combustion takes place. This waste heat box was located
in such a manner that it and the upper portion of the fire tubes were always above the
water level and by becoming excessively hot caused great loss of heat by radiation.
Now, according to my present improvements 1 so arrange the waste heat box and

page_text: Fig. 1 is a vertical section on the line A, B, of Fig. 3, Fig. 2 is a vertical_section
on the line C, D, of Fig. 3, and Fig. 3 is a horizontal section on the line E, F, of
Fig. 1, shewing my invention as applied to a vertical steam generator.
It will be seen that these figures illustrate a generator similar in construction to that
shown by Fig. 5 of the specification of Patent No. 13,733 of 1884, and by Fig. 6 of
the specification of Patent No. 7633 of 1888.
The fuel is converted into gas in the central portion of the producer a and the gases
are led, by the vertical uptake b, into the cross tubes c, c, which pass through the waste
heat-box dand which heat-box, as will be seen, is situated below the level of the water
contained in the boiler and, as before stated, forms an important feature in my con-
struction of self-contained gas-fired steam-generators. From the cross tubes c the
gases descend by the conduits e, e, and enter the combustion chamber where, after
becoming mixed with air entering through openings f1 (Fig. 2) and becoming heated
in its passage downwards to a similar temperature to that of the gases coming from
the producer, ignition takes place and perfect combustion ensues. The products of
combustion rise up through the fire tubes g, g, and enter the waste heat-box d from
whence they are led away by means of a flue h (Fig. 2). That portion of the
cross tubes c, c, contained within the waste heat-box d are, by preference, lined
with refractory material. The waste heat-box is rigidly kept in place by means of
the stays d', d¹, the fire tubes g, and by being rivetted, in suitable parts, to the
shell of the boiler.
Instead of employing one large central uptake b, as shewn in the drawings, I
may, if desirable, use two or any other convenient number of smaller uptakes.
i is a water jacket surrounding the producer and which is open at its upper end
so as to be in direct communication with the water contained in the boiler
In order to insure rapid and complete circulation the opening of the water
jacket is made wider at the top than at the bottom, the fire tubes and tube plates
being arranged, for this purpose, in an inclined position.
(Fig. 2) is the feeding hopper through which fresh fuel may be fed to the
producer when necessary.
Although I have described my improvements as applied to a vertical form of
steam generator they may equally well be arranged to suit a horizontal form of
steam generator constructed on the principle laid down in my said invention.
By my present construction of steam generator, the waste heat box and the fire
tubes are always below the level of the water in the boiler and the heat radiating
therefrom, which was formerly lost, is now utilized to aid in heating the water,
and thus I obtain much better results than heretofore. At the same time, by this
construction, all the parts requiring cleansing may be readily reached through the
manholes k, k, k², k³, k provided for the purpose.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, i claim:-
1. In a self-contained gas-fired steam-generator in which the fuel is converted into
gas in the central part of the fire box and the combustion chamber is formed between
the producer and the outer casing of the fire-box, the arrangement below the level of

page_text: the water in the boiler of the fire tubes, and the waste heat box through which the
cross tubes pass, substantially as and for the purpose herein before described.
2. In a self-contained gas-fired steam-generator of the kind referred to in claim 1,
the arrangement of the fire tubes beneath the level of the water, the same and the tube
plates in which they are fixed being in inclined positions, as and for the purpose
described and shewn by Figs. 1 and 2 of the annexed drawings.
Dated this 17th day of June 1800
ERNEST DE PASS,
78, Fleet Street, London, Agent for the Applicant.