Improvements in Steam Boilers.
Year: 1889

page_text: Date of Application, 14th Nov., 1889-Accepted, 14th Dec., 1889
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
I, WILLIAM HENRY WOOD, of Cradley Heath, in the county of Stafford, Boiler
Maker, 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 the construction and arrangement of vertical tubular
boilers, in which diametrical cross water tubes, and vertical water tubes, are carried
within the fire box, and its object is to provide in combination therewith, an upper
internal combustion chamber, having connected therewith horizontal heating tubes,
leading thence to the smoke box and the chimney; constructed and arranged sub-.
stantially as hereinafter described and illustrated, whereby they are rendered very
efficient and economical in action, and the parts requiring cleaning from soot, deposit
or other accumulation, are rendered easy of access.
In order to the better explain this my invention, and the manner in which it is to
be performed, I have, as before intimated, appended hereunto illustrative sheets of
drawings, upon which are figures and letters of reference, similar letters referring
throughout the several views to the same thing or part, and in which:-
Fig. 1, is a sectional elevation of a boiler constructed according to this my
invention.
Fig. 2, is a sectional plan of Fig. 1, upon line A-B.
Fig. 3, is a sectional plan shewing modified arrangement of combustion chamber,
first way horizontal tubes, and return horizontal tubes.
a, is the cylindrical shell of the boiler, which may have a dome shaped, or flat
stayed top, and within it is provided an elevated firebox crown b; c, is the fire door ;
d, d, d, are diametric cross water tubes, to each of which is connected two vertical
water tubes e, e, &c., which said tubos e, communicate direct with the upper internal
part of the boiler through the crown b, of the fire box.
At a little distance above the fire box, is placed the horizontal cylindrical combus-
tion chamber f, which is communicated with from the fire box, by the opening 9.
The one (inner) end of this chamber consists of a plato, prepared to receive the
horizontal heating tubes 7, their other ends being carried in a plate, upon or near the
outside or shell of the boiler, and situated within the smoke box i.
e,
The course of the flame will be readily understood by reference to the arrows, as
it will first play around the cross and vertical tubes d & then
pass through the
opening g, into the chamber f, thence through the tubes h, to the smoke box i, and
chimney i
Instead however of having but one series of horizontal tubes h, I may in some
cases use the sinoke box i, only (or a similar chamber,) on that side, that is, having
the chimney, removed; and provide a second series of horizontal return tubes k,
(see Fig. 3) which lead into smoke box and chimney upon the opposite side, as seen
in dotted lines in Fig. 1.
Or, instead of the series of horizontal tubes h or k, or both, a single tube or tubes
may be used, the arrangement however illustrated in Fig. 1, I find to give very good
results, and would generally be preferred.
At i, and m, suitable cleaning doors are provided opposite to the ends of the
horizontal tubes h, & k, so that they may be readily cleaned when required, also
similar cleaning holes are provided in the shell a, of the boiler opposite the cross
tubes d, d, d, for the same purpose.
By this my invention a most perfect circulation is effected, whilst an increased
heating surface is attained, with a corresponding economy of fuel.

page_text: I wish it to be understood that I do not here claim the cross tubes d, and the
vertical tubes e, in and of and by themselves, nor in their combination merely with the
fire box, but ;
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The improvements in the construction and arrangements of vertical boilers as
herein set forth, that is to say ;-
1. In a vertical boiler, the combination with the vertical water tubes e, and the cross
water tubes d, of the combustion chamber, and the horizontal heating tubes h, con-
structed and arranged substantially as described and illustrated upon the drawings in
Figs. 1, & 2.
2. In a vertical boiler, the modified combination with the vertical water tubes e,
and the cross water tubes d, and the combustion chamber f, and the horizontal heating
tubes h, of the return horizontal heating tubes k, constructed and arranged substantially
as described and illustrated upon the drawings in Fig. 3, and partly in Figs. 1, & 2.
Dated this 13th day of November 1889.
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicant's Agent.
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicant's Agent.