Improvements in Steam Boilers and Furnaces.
Year: 1886

page_text: Date of Application, 10th June, 1886.
Complete Left, 10th Mar., 1887.
Complete Accepted, 10th June, 1887.
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers and Furnaces.
REGINALD WALTER HEWETT 65 Albion Street Birmingham in county of
Warwick, Manufacturing Jeweller do hereby declare the nature of this invention to be
as follows:-
My invention relates to the manner in which I construct and arrange boilers
having a tube or tubes within the same for containing the fuel, such tubes or flues to
be employed for holding a deeper or thicker amount of fuel than is the case in
ordinary flues of the boilers as generally and usually constructed, where the fuel is
as it were a burning layer rather than a deep body or mass of fuel.
And arrange
the tubes or flues in such a manner that the fuel shall be fed upon the top of same
in the ordinary manner, or by any mechanical appliance such as a sliding hopper
for allowing the fuel to enter each time the slide moves; but this arrangement 1 lay
no claim to in my present invention, as any ordinary well known means of feeding
can be readily employed. In constructing a boiler according to my invention, I
employ one or more tubes or flues as may be required according to the size of the
boiler, to contain the fuel; the bottom part of such tube or flue I cover with a
perforated plate this plate forms a base upon which the fuel rests, and the holes
allow the air to enter and thus support combustion. The top part of the tube or flue
I arrange in such a manner, that one portion or side thereof shall serve as a feeding
space, while the other shall serve for the egress of the smoke and heated air; that is
to say I divide the tube at the top into two compartments, one for the egress of
smoke &c. the other for ingress of fuel. The egressing current I cause to travel by
means of suitably arranged tubes or flues through the boiler, or along the outside of
same, in such a manner that the heat shall be given up to the water and thus the full
value of the fuel can be obtained before the chimney is reached by the egressing
currents of smoke &c.
I prefer to employ a current of air to create a forced draught, and thus promote
combustion, by means of a connection made to a mechanical exhauster, as set forth in

page_text: my specification, for which Provisional Protection was granted me on the fifth day of
February 1886, No. 1711.
When a number of tubes or flues are employed I prefer to arrange them so that one
common hopper shall feed them together or any one may be disconnected at will
also that one common exhaust flue into which the smoke can be directed; and
disconnections may be made from any flue or tube at will.
When I employ a forced exhaust current to assist combustion, I sometimes arrange
that the current before entering the chimney may be made to heat the air issuing
under the burning fuel, thus giving hot air to the same.
The exact shape or configuration of the tubes or flues for containing the fuel forms
no part of my invention as circular, rectangular conical or oval may be used with
equal effect when arranged as hereinbefore described.
Dated this 9th day of June 1886.

page_text: COMPLETE SPECIFICATION.
Improvements in Steam Boilers and Furnaces.
1, REGINALD WALTER HEWETT of 65 Albion Street Birmingham in the County of
Warwick Manufacturing Jeweller do hereby declare the nature of my said invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement that is to say-
My invention relates principally to the manner in which I construct and arrange
combustion chambers for steam generators, or steam boilers whereby greater heating
surface is obtained and thus a great saving of fuel effected, besides many more
advantages which will be obvious.
The
The mode of carrying my invention into practical effect is as follows:-I arrange
combustion chambers of any suitable form (usually that of circular tubing arranged
vertically) through and within the boiler with a branch piece or pieces placed between
the extremities and this branch piece is continued in suitable directions through the
water space and ultimately through the shell of the boiler where convenient.
vertical tubing before mentioned below the branch piece being the chamber to contain
the fuel for combustion the upper part i.e. above the branch piece serves as an ingress
for the fuel which may be fed by a hopper made air tight, the fuel being fed falls
down these tubes upon a moveable perforated base at the lower extremities which
serves for the inlet of the air or gasses for supporting the combustion and egress of
the remains of combustion or ashes. Combustion takes place right up to the branch
piece through which the consumed air or gasses pass, by this means a line of burning
fuel is maintained in the tube or tubes from the perforated base to the region of
branch piece or pieces which is of course placed at a suitable distance below the
water line of the boiler. It will be observed that all the air or gasses which go to
support combustion passes through the fuel and not any is able to pass over the fuel
and thus the whole is utilized and the fire is in direct contact with the said tubing
internally and externally with the water in the boiler therefore the heating depends on
the red hot fuel and not so much on the hot air or gasses as is usual in steam
boilers.
To promote a good combustion I employ a current of air to create a forced draught
by means of a connection made to a mechanical exhauster as explained and claimed in
my Specification No. 1711 for which I have obtained Letters Patent dated 5th of
February 1886.
It will be seen that the number of combustion chambers necessary to the full
effect desired would be decided by the size and horse power of the boiler in which
they are to be employed. Where more than one combustion chamber is used the
branch pieces may be united and the consumed air or gasses conveyed through the
one continued piece and ultimately through the shell of the boiler, although this
method of uniting the branch pieces is not absolutely necessary as they could each be
separated according to circumstances or design.
Hitherto I have described the combustion chambers as being arranged vertically
but it will be understood that I do not confine myself to this method as I can also

page_text: arrange them horizontally. In this case I usually make the chambers deeper than
their width similar to an oval shape and feed them through a number of tubes that
run from the top of the boiler through the steam space and part of the water space.
I also have branch pieces from the fire chamber and continued through the water
space and out through the shell of the boiler in a suitable place for the egress of the
air or gases at the bottom of the fire chamber I have a perforated base plate as before
described for the fuel to rest upon and also to allow of the ingress of air or gases and
egress of the remains of comb ustion or ashes.
In order that my invention may be more clearly understood I have appened
hereunto a sheet of drawings upon which I have shewn one method of applying my
invention to a vertical boiler but I do not confine myself to the exact manner of
constructing the branch pieces as this can readily be done in divers ways such for
instance as having them direct or partly direct.
Figure 1 is a part sectional elevation.
Figure 2 is a sectional plan upon line, A. B. and
Figure 3 is a similar plan upon line C. D.
Now referring to the drawing E is a circular air tight tank which is kept filled with
coke breezes or any suitable fuel through sliding doors or lids e¹ and e² and this
suitable fuel falls down the tubes F until it reaches the bottom of them.
We will suppose that the boiler is filled with water and ready for firing by holding
a lighted brand beneath the perforated plate J at the bottom of the flues F and
giving a few turns to a blower or fan connected with the air chamber G a brisk
fire is at once, kindled and in a very short time the whole lengths of the flues are
in a blaze.
It will be seen that that the air travels through the perforated plate J up through
the fuel and through the branch pieces H seen clearly in Figure 2 into the main air
chamber carrying all smoke and creating a flaming mass of fire in the flues
right up to the branch pieces. The perforated plates may have a handle attached so
that they can be moved backwards and forwards for the purpose of cleaning the
tubes and removing all remains of combustion.
I would have it understood that I do not confine myself to the exact details
hereinbefore described such for instance as the shape of the combustion chambers as
they may be made of any desired shape and can be used with equal effect without
departing from the spirit of my invention.
Having therefore now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed what I claim is :-
The improvements in steam boilers having one or more fire chambers, air chamber
or chambers arranged vertically, horizontally or otherwise and branch piece or pieces
substantially as and for the purpose herein described and set forth.
1300
HATIT 1000 CLEA
1934
GEORGE PRICE,
7, Ferndale Place, Anderton Street,
Birmingham,
Agent for the Applicant.
GEORGE PRICE,
7, Ferndale Place, Anderton Street,
Birmingham,
Agent for the Applicant.