Improvements in Steam Boilers.
Year: 1889

page_text: Date of Application, 25th Apr., 1889
Complete Specification Left, 30th Nov., 1889-Accepted, 4th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
We JOHN LEE WHITE and HERBERT SAMUEL WHITE both of East Cowes Isle of
Wight Ship Builders do hereby declare the nature of this invention to be as
follows:-
Our Invention relates to such steam boilers as consist essentially of coiled tubes
arranged in an upright position and communicating with steam and water chambers
to which the said coiled tubes are connected at their upper and lower ends
respectively. The outer shell of steam boilers of this kind usually consists of a double
casing of metal into and from the space between the outer and inner walls of which
casing air is free to pass.
Our said Invention consists essentially in the division of the interior of a boiler of
the said kind by means of rows or walls of tubes arranged close together and connected
at their ends with the steam and water chambers hereinbefore referred to.
We arrange the said rows or walls of tubes in such a manner that the products of
combustion of the fuel in the furnace are thereby prevented from taking a direct course
between the several coils to the chimney or chimneys of the boiler and the flames are
prevented from impinging on the outer shell of the boiler. We prefer to so arrange
the said rows or walls of tubes as virtually to form within the boiler a roof to the fire
box and a middle flue or middle flues and side or return flues through which several flues
the said products of combustion must travel on their way out of the boiler. We also prefer
to arrange the said rows or walls of tubes in the direction of the length of the furnace of
the boiler and to extend them some distance beyond the rear end of the furnace and
to arrange beyond the said rows or walls of closely set tubes and in line with them
other rows of tubes set at some distance apart and also connected at their upper
and lower ends to the steam and water chambers of the boiler through the spaces
between which latter tubes the products of combustion pass in travelling from one to
another of the flues formed by the rows or walls of closely set tubes.
It is not necessary to our invention that the coiled tubes hereinbefore referred to be
arranged vertically as they may be arranged in an inclined position or in any other
position which may be found desirable or convenient.
OL
Anil 1980
W. T. WHITEMAN,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
We JOHN LEE WHITE and HERBERT SAMUEL WHITE both of East Cowes Isle of
Wight Ship Builders 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 :-
Our Invention relates to such steam boilers as consist essentially of coiled tubes
arranged in an upright position and communicating with steam and water chambers
to which the said coiled tubes are connected at their upper and lower ends
respectively. The outer shell of steam boilers of this kind usually consists of a double
casing of metal into and from the space between the outer and inner walls of which
casing air is free to pass.
Our said Invention consists essentially in the division of the interior of a boiler of
the said kind by means of rows or walls of tubes arranged close together and
connected at their ends with the steam and water chambers hereinbefore referred to

page_text: We arrange the said rows or walls of tubes in such a manner that the products o
combustion of the fuel in the furnace are thereby prevented from taking a direct
course between the several coils to the chimney or chimneys of the boiler and the
flames are prevented from impinging on the shell of the boiler. We prefer to so
arrange the said rows or walls of tubes as virtually to form within the boiler a roof to
the fire box and a middle flue or middle flues and side or return flues through which
several flues the said products of combustion must travel on their way out of the
boiler. We also prefer to arrange the said rows or walls of tubes in the direction of
the length of the furnace of the boiler and to extend them some distance beyond the
rear end of the furnace and to arrange beyond the said rows or walls of closely set
tubes and in line with them other rows of tubes set at some distance apart and also
connected at their upper and lower ends to the steam and water chambers of the
boiler through the spaces between which latter tubes the products of combustion pass
in travelling from one to another of the flues formed by the rows or walls of closely
set tubes.
Two forms of marine boilers of the construction hereinbefore referred to and
having our said improvements applied to them are illustrated in the accompanying
Drawings which are hereinafter referred to by the letters and figures marked
thereon. Figure 1 is a transverse section and Figure 2 is a longitudinal section of a
boiler in which a middle flue and two side or return flues are constructed according
to our invention the section Figure 1 being taken on the line A Figure 2 and the
section Figure 2 being taken on the line B Figure 1. The same letters and figures
of reference indicate the same parts in both the said Figures.
*
aa is the usual double metal casing constituting the outer shell of the boiler ¹² are
the funnels c is the furnace or fire box and d d are the coiled tubes. e is the steam
chamber and are the water chambers with which the said coiled tubes d d communi
cate at their upper and lower ends respectively. g g (see Figure 2) are the usual
outside communications between the steam chamber e and the water chambers ff*.
hare the tubes by which the interior of the boiler is divided according to our
invention the said tubes being arranged close together in two rows and connected at
their upper ends with the steain chamber e and at their lower ends with the water
chambers ff. The said tubes h h thus arranged in rows constitute a roof to the fire
box or furnace c and also constitute walls by which the products of combustion from
the furnace are prevented from passing direct from the said furnace between the
coils d d to the funnels 162 the flames from the fuel in the said furnace being thereby
prevented from impinging on the shell a of the boiler. The division of the interior
of the boiler by means of the said rows or walls of tubes h h as shown in the accom-
panying Drawings forms a middle flue and side or return flues the space between the
two rows or walls of tubes constituting the middle flue and the spaces between the
shell of the boiler and the said rows of tubes constituting the return flues through
which middle and return flues the said products of combustion must travel on their
way from the furnace to the funnels. The other tubes which are hereinbefore
referred to as arranged at some distance apart beyond the said rows or walls of
tubes hand in line with them are shown in Figure 2 of the accompanying
Drawings and marked i, i the upper ends of the said tubes i i being connected to the
steam chamber e and the lower ends of the said tubes to the water chambers ff* in
the same manner as the tubes h. jj are the spaces between the said tubes i i
through which spaces the products of combustion pass in travelling from the middle
flue or space between the two rows of tubes h h to the side flues or spaces between
the said rows of tubes and the sides of the shell a of the builer.
Figure 3 of the accompanying drawings is a transverse section of a boiler of the kind
to which our invention relates and in which two middle flues and two side or return
flues are constructed according to our invention. The said boiler is provided with
two furnaces or fire places k¹ k² two steam chambers and three water
chambers m² m² m³. The said steam chambers are respectively connected to two of the
water chambers (viz. those marked m' m²) by pipes 'n' n² arranged side by side and
set closely together in the form of rows or walls extending from the front of the boiler

page_text: some distance beyond the rear part of the furnaces and by other pipes arranged at
some distance apart beyond the said closely set pipes and in line with them as
described with reference to the pipes i, i illustrated in Figures 1 and 2. The steam
chamber is also connected to the water chamber m³ by means of other pipes o
arranged close together in the form of a wall or continuous row extending from the
front of the boiler to the rear end thereof the interior of the boiler casing being
divided longitudinally by the said wall or row of pipes o into two portions. By the
arrangement hereinbefore described of the pipes 2 and o two middle flues and two
side or return flues are formed the middle flues being the spaces between the wall
of pipes o and the walls of pipes n' and n² and the return flues being the spaces
between the said walls of pipes n' and n² and the outer casing of the boiler. The
said casing the funnels the coiled tubes communicating between the steam and water
chambers and the pipes forming the outside communications between the said
chambers are marked with the same letters of reference as the corresponding parts
illustrated in Figures 1 and 2 and herein before described.
The action of this arrangement is as follows-the gaseous products of combustion
from the furnace on the left side of the boiler pass along the flue formed by the walls
of pipes n' and o to the rear part of the boiler and then pass between those of the
said pipes n' which are set at some distance apart into and through the return flue
on the same side of the boiler to the funnel and the gaseous products of combustion
from the furnace 2 on the right of the boiler take a corresponding course through
the flues on that side to the funnel 62.
Although we prefer to arrange the rows or walls of closely set tubes which
communicate between the steam and water chambers in the positions shown in the
accompanying Drawings and to arrange tubes in the spaces which form communi-
cations between the middle and return flues as shown at ii in Figure 2 of the
accompanying drawings and herein before referred to yet we wish it to be understood
that the said details do not constitute essential features of our invention as the said
rows or walls of closely set tubes may be arranged in other positions and the tubes
arranged in the said spaces may be dispensed with. We also wish it to be understood
that our invention is applicable to boilers of other forms than those illustrated in the
accompanying Drawings and that it is not necessary to our invention that the
coiled tubes d d be arranged as shown in an upright position as they may be
arranged in inclined positions or in any other positions which may be found desirable
or convenient.
Having now particularly described and ascertained the nature of the said Inven-
tion and the manner in which the same is to be performed we declare that what we
claim is:-
The improvements hereinbefore described in such steam boilers as consist of tubular
coils communicating at their upper ends with a steam chamber or steam chambers and
at their lower ends with water chambers that is to say the construction in such boilers
of a middle flue or middle flues and side or return flues by means of tubes communi-
cating with the said steam and water chambers.
Dated this 29th day of November 1889.