IMPROVEMENTS IN STEAM GENERATORSERATORS
Year: 1881

page_text: LETTERS PATENT to Nathan Gold Kimberley, of Stoke Newington, in the
County of Middlesex, Engineer, for an Invention of "IMPROVEMENTS IN
STEAM GENERATORS."
PROVISIONAL SPECIFICATION left by the said Nathan Gold Kimberley at
the Office of the Commissioners of Patents on the 21st May 1881.
NATHAN GOLD KIMBERLEY, of Stoke Newington, in the County of Middlesex;
Engineer. "IMPROVEMENTS IN STEAM GENERATORS."
My Invention relates to improvements in steam generators, such as boilers,
whereby a forced blast heated by the waste products of combustion, combined with
a certain degree of pressure in the fire box and flues maintained by an adjustable
damper or valve, and further combined, if desired, with a heating of the feed water
and a drying, reheating, or superheating of the steam, effects a considerable dimi-
nution in the quantity of air required for combustion, and also by its high
temperature of admission a marked economy in the weight of fuel required for
each unit of water evaporated.
The apparatus by which I effect these improvements is as follows: I preferably
close the ash pit and furnace, the whole of the ashpit being conveniently sur-
rounded with heating space, the suitable man-holes or doors to ash-pit or furnace
being fitted with air-tight joints.
The necessary blast I produce in an artificial manner by a fan or other
suitable contrivance. The blast so produced I lead by a pipe or pipes through a
suitably arranged chamber or flue, into which the hot gases of combustion are
received after they have effected evaporation.
The air blast is thus heated to a considerable degree, and is in this state forced
under the furnace bars and through the grate or over the bars into the combustion
chamber or fire box.
The exit from the smoke box or waste heat chamber is altered to any desired
extent by a damper or valve, so as to retain the hot gases within at any required
pressure.
In the smoke box or waste heat chamber I may arrange a coil of pipe, in which
the feed water may be circulated and heated by contact with waste hot gases, and
similarly the steam, as generated in the boiler, may be passed through this same
waste heat chamber or flue, so as to become dried, reheated, or superheated
before use.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Nathan Gold Kimberley in the Great Seal Patent Office on the
21st November 1881.
NATHAN GOLD KIMBERLEY, of Stoke Newington, in the County of Middlesex,
Engineer. "IMPROVEMENTS IN STEAM GENERATORS."
My Invention relates to improvements in steam generators, such as of boilers,-
whereby a forced blast heated by the waste products of combustion, combined with
a certain degree of pressure in the fire box and flues, maintained by an adjustable
damper or valve, and further, if desired, with a heating of the feed water and a
drying, reheating, or superheating of the steam, effects a considerable diminution
in the quantity of air required for combustion, and also by its high temperature of
admission a marked economy in the weight of fuel required for each unit of water
evaporated.
The apparatus by which I effect these improvements is as follows: -I preferably
close the ash pit and furnace, the ashpit being conveniently surrounded with water
heating space, suitable manholes or doors to ashpit or furnace being fitted with air
tight joints. The necessary blast I produce in an artificial manner by a blower. The
blast so produced I lead by a pipe or pipes through a suitably arranged chamber or
flue, into which the hot gases of combustion are received after they have effected
evaporation. The air blast is thus heated to a considerable degree, and is in this
state forced into contact with the combustible matter in the combustion chamber
or fire box.
The exit from the smoke box or waste heat chamber is closed to any desired
extent by a damper or valve, so as to retain the hot gases within at any desired
pressure.
In the smoke box or waste heat chamber I may arrange a system of pipes in which
the feed water may be circulated and heated by contact with waste hot gases, and
similarly the steam, as generated in the boiler, may be passed through the same
waste heat chamber or fluo, so as to become dried, reheated, or superheated
before use.
And in order that my Invention may be the better understood I now proceed to
describe the Drawings hereunto annexed, reference being had to the letters and
figures marked thereon, that is to say:-
Fig. 1 is a longitudinal section through a multitubular boiler fitted with my
improved apparatus. A is the fire box fitted with any convenient set of fire bars B.
The fire door C and ash pan D are closed hermetically, and the fire door is provided
with a special apparatus, so that the coal can be introduced conveniently without
destroying the hermetically closed joint. The coal is first filled into a hopper E,
which is closed at the top by a lid e, and at the bottom by a second lid f.
After the upper lid e has been closed the lower lid f may be opened by means of
an external lever, and the coal is thus allowed to fall on to the hearth plate;
thence the fuel can be pushed on to the grate by the sliding shovel and
bandle F.
The air for combustion is introduced under the fire grate B through the pipe G,
having previously been heated in the chambers H, H. This current of air is
caused by a blower to flow through the series of heating tubes K.
These tubes K
cause the current of air to be broken up by sub-division into a number of small
streams suited to a rapid acquisition of the heat from the waste gases of combustion
which surround these tubes. By S bends and suitable baffle plates & the area of
heating tubes travelled over by the waste gases may be increased to any required
extent.
The exit of this heating chamber at L is closed to any required degree by the
valve, which will thus regulate the pressure at which the forced air blast is
maintained in the fire box A and heating chamber, known as smoke boxes H, H.
The blast of air so heated is forced through the fire grate B, and also when,

page_text: desired, through apertures in the fire bridge M; this may be regulated by the
opening or closing of the valve N. In furnaces where no bars are used I direct
the heated blast so as to impinge upon the combustible matter. A series of
S tubes K¹ are shown in a compartment R of the heating chamber, known as a
sinoke box, through which the feed water is passed, so that it may become heated
before entering the boiler.
Figure 2 is a transverse horizontal section through the chambers H, H, showing
the arrangement of the tubes K.
Figure 3 is an end view of one of the heating chambers or smoke box O, shown
in section in Figure 1, and in which only one coiled pipe P is fixed for the drying
or superheating of the steam as it passes from the boiler to the engine.
Figure 4 shows the end view of the waste heat chamber known as the smoke
box O, shown also in section in Figure 1, and the arrangement therein of two coiled
pipes P, Q, which is that I adopt in compounded engines. One of these coils P is the
pipe through which the steam is first passed, so as to become dried and superheated
by the waste gases of combustion on its passage to the high pressure cylinder.
The other coil Q is that through which the exhaust steam is passed from the high.
pressure cylinder, and which acts as a receiver thereto and reheater of the steam
on its passage to the low pressure cylinder.
Figure 5 is an outside end view of the stoking apparatus herein before
described.
Figure 6 is a transverse section through the boiler, showing the arrangement of
the boiler tubes.
And having now fully described and ascertained the nature and object of my
Invention, and the manner in which it is to be performed, be it known that what
I consider novel and useful and desire to protect by my Letters Patent is,-
I. The combination in a steam generator of any known blower and the hot air
supply pipe or channel in the waste heat chamber or flue (leading to the fire box),
and the adjustable valve or damper, substantially as and for the purposes
specified.
II. The alternative combination with the blower, hot air supply pipe, and
adjustable valve aforesaid; of the feed water pipe in the waste heat chamber or
flue, substantially as and for the purposes specified.
III. The alternative combination with the blower, hot air supply pipe, and
adjustable valve aforesaid, of the steam drying pipe in the waste heat chamber or
flue, substantially as and for the purposes specified.
IV. The alternative combination with the blower, hot air supply pipe, and
adjustable valve aforesaid, of the double steam drying and steam reheating pipes
in the waste heat chamber or flue, substantially as and for the purposes
specified.
V. The complete combination of the aforesaid blower, hot air supply pipe,
adjustable valve, feed water pipe, and steam drying pipe or pipes, substantially as
and for the purposes specified.
In witness whereof, I, the said Nathan Gold Kimberley, have hereunto set my
hand and seal, this Seventeenth day of November, in the year of our Lord
One thousand eight hundred and eighty one.
Witness,
S. P. WILDING,
23, Rood Lane, London, E.C.,
Patent Agent.
N. G. KIMBERLEY. (L.S.)