Improvements in Boilers.
Year: 1890

page_text: Date of Application, 13th Dec., 1.900
Complete Specification, Left, 20th Aug., 1891-Accepted, 26th Sept... 1891
PROVISIONAL SPECIFICATION:
Improvements in Boilers.
I CHARLES LOXTON JACKSON of Wharf Foundry, Bolton in the County of
Lancaster, Engineer, do hereby declare the nature of, my, said invention to be as
follows:-
of
This invention relates to improvements in-boilers, and is equally applicable to
what are known as Lancashire, Cornish; tubular, marine, locomotive, portable, and
other types of steam boilers and others, such as, those for stoving, drying, boiling, and
other purposes, fed by coal, gas, oil, or. hydro-carbons, and has for its object, that of
increasing the heating surface of the flues or furnaces and the evaporative power
the boiler, also to reduce the liability to collect soot; and other, sediment or refuse
to a minimum, thereby removing a serious. defect, in the existing types.. of boilers.
This Ieffect-by-constructing the flues or, furnace tubes in a wave like, serpentine,
spiral; or angular form to produce a greater. and more, uniform, heating, surface
against which the impinging action of the flame and heat from the furnace will
operate more effectually than hitherto. The flues or, furnace tubes, can, be, con-
structed transversely in circular, oval, square, or other forms as desired, and can be
The wave
provided with cross circulating tubes secured by, nuts or other means.
like, serpentine, spiral, or angular form of the flues or furnace tubes can be of such
a-size-as to rise almost to the water. level, and dip down to a point near the bottom
of the boiler shell; the latter conveying the heat to the coldest part of the boiler,
thus distributing the heating surface in anuniform manner in the liquid/surrounding
the same.
The flues or furnace.tubes,can be made in sections, and secured together
by any of the well known methods, or can be. interspersed by square, or other
chambers to stiffen the same.and increase the heating surface. The flues or furnace
tubes can be secured inside the boiler in an uniform manner longitudinally, or crossed
as desired; and can. be connected, to the back, plate of the boiler shell to deliver
heat and smoke into the back flue, or, to a chamber or chambers to deliver, the heat
and smoke into the side flues. The flues or, furnace tubes can. be, constructed
transversely in a welded ring or rings, or by means of butt, overlapped, or, flanged
joints in the usual! manner. The fire-box or furnace chamber can be of the usual
description or otherwise fitted with a baffle plate or plates or other equivalents.
Dated the 12th December 1890.
1
EDMUND CHADWICK,
Agent:
COMPLETE SPECIFICATION:
Improvements in Boilers.
I, CHARLES LOXTON JACKSON. of; Wharf Foundry, Bolton in the County of
Lancaster, Engineer, 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 :-
This invention relates to improvements, in boilers and is equally applicable to
what are known as Lancashire, Cornish, tubular, marine, locomotive, portable, and
other types of steam boilers and others, such as, those for stoving, drying, boiling,
and other purposes, fed. by coal; gas, oil, or hydro-carbons, and, has for its object
that of increasing the heating surface of the flues or furnaces and the evaporative
power of the boiler, also to reduce the liability to collect soot and other sediment
or, refuse to a minimum, thereby, removing a, serious defect in the existing types of
"

page_text: boilers. This I effect by constructing the flues or furnace tubes in a wave like,
serpentine, spiral, or angular form to produce a greater and more uniform heating
surface against which the impinging action of the flame and heat from the
furnace will operate more effectually than hitherto. The flues or furnace tubes can
be constructed transversely in circular, oval, square, or other forms as desired, and
The
can be provided with cross circulating tubes secured by nuts or other means.
wave like, serpentine, spiral, or angular form of the flues or furnace tubes can be of
such a size as to rise almost to the water level, and dip down to a point near the
bottom of the boiler shell; the latter conveying the heat to the coldest part of the
boiler, thus distributing the heating surface in an uniform manner in the liquid
surrounding the same. The flues or furnace tubes can be made in sections, and
secured together by any of the well known methods, or can be interspersed by
square or other chambers to stiffen the same and increase the heating surface."
The flues or furnace tubes can be secured inside the boiler in an uniform manner
longitudinally or crossed as desired, and can be connected to the back plate of the
boiler shell to deliver heat and smoke into the back flue, or to a chamber or
chambers to deliver the heat and smoke into the side flues. The flues or furnace
tubes can be constructed transversely in a welded ring or rings, or by means of
butt, overlapped, or flanged joints in the usual manner. The fire-box or furnace
chamber can be of the usual description or otherwise fitted with a baffle plate or
plates or their equivalents.
DESCRIPTION OF DRAWINGS.
Fig. 1, Sheet 1, is a longitudinal sectional elevation of a Lancashire, Cornish,
or other boiler fitted with my improved spiral, serpentine, or wave like form of
flues. Fig. 2 is a plan of same. Fig. 3 is an outside front end view.
Fig. 4, Sheet 2, is a longitudinal sectional elevation of a Lancashire, Cornish,
or other boiler fitted with my improved serpentine or wave like form of flues.
Fig. 5 is a plan. Fig. 6 is an outside front end view.
Fig. 7, Sheet 3, is a longitudinal sectional elevation of a Lancashire, Cornish,
or other boiler fitted with my improved angular or wave like form of flues. Fig. 8
is a plan, and Fig. 9 is a front outside end view.
.space.
In all the figures the same letters are employed to indicate corresponding parts.
A is the ordinary boiler shell; B the ordinary furnace flues; C the fire-bars;
D the dead-plate; E the bridge; F the working water level, and G the steam
To the inner ends of the furnace flues B I attach, by means of flanged
joints I, angle irons, bowling hoops, welded joints, over-lapped joints, or other well
known means, the flues H which may be in a wave like, serpentine, spiral, or
angular forms as shown in the drawings. My improved flues H can be constructed
transversely in circular form as shown, or oval, square, or other forms as desired or
necessary according to the construction and make of boiler. The flues H, although
not shown, can be provided with cross circulating tubes, secured in the usual manner
by welding, rivetting, nuts, and other means. The flues H can be made in sections
or lengths as shown; being secured together by means of flanged joints I, angle
irons, bowling hoops, or other well known methods, and can be, although not shown,
interspersed with square or other chambers to stiffen the same and increase the
heating surface. The flues H can be secured inside the boiler shell A. in an
uniform manner longitudinally as shown in Figs. 4 to 9 inclusive, or crossed as
shown in Figs. 1 and 2. The flues H are connected to the back plate J of the
boiler shell A in the usual manner, so as to deliver the heat and smoke into the
back flue or flues formed by brickwork or other means. By constructing the flues H
in a wave like, serpentine, spiral, or angular form a greater and more uniform
heating surface is provided, against which the impinging action of the flame and
heat from the fire on the fire-bars C in the furnace flues B will operate more
effectually than hitherto. By constructing the flues H in the wave like, serpentine,
spiral, or angular forms set forth and as shown in the drawings the upper side, or

page_text: sides, of same rises almost to the working water level F, and the lower side, or
sides, dips down to a point near the bottom of the boiler shell and conveys the heat
to the coldest part of the boiler, by which means the heating surfaces are distributed
in a more uniform manner than hitherto in the water or liquid surrounding the
Another advantage of this invention is that the lodgement for soot and
other imperfections is reduced to a minimum, as the form of the flues H allows of
the same being swept or blown forward by means of the current of air passing
through the same to the chimney or its equivalent.
same.
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:-
In combination with Lancashire, Cornish, tubular, locomotive, portable, and
other boilers the use and construction of the wave like, serpentine, spiral, or
angular form of flues H of any transverse section, jointed as shown or otherwise,
with or without cross circulating tubes and square or other intervening chambers,
substantially as and for the purposes set forth and as illustrated in the drawings.
Dated the 18th August 1891.
EDMUND CHADWICK,
Agent.