Improvements in Steam Boilers.
Year: 1893

page_text: Date of Application, 26th Sept., 1893
Complete Specification Left, 26th June, 1894-Accepted, 28th July, 1894
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 consists of the improvements hereinafter described in such steam
boilers as consist essentially of tubes communicating with steam and water chambers
and enclosed in a metal casing in the lower part of which is the furnace or fire box
the objects of our said improvements being principally to avoid loss of heat through
the said casing and to admit of ready access to the tubes for cleaning them.
According to our said improvements we arrange within the casing and at a slight
distance from the sides and ends thereof rows or walls of tubes each of which
communicates at one end with one of the water chambers and at the other end with
the steam chamber the said rows or walls of tubes forming virtually a lining to the
said casing by which free passage of heat from the furnace to the said casing is:
prevented. Within the space enclosed by the said rows or walls of tubes (which.
tubes are hereinafter termed the lining tubes) we arrange tubular coils each of
which coils is also connected at one end with one of the water chambers and at the:
other end with the steam chamber. The said coils thus arranged are readily.
accessible from the interior of the boiler for the purpose of cleaning them when
necessary. To provide for passage of the products of combustion from the furnace
to the chimney of the boiler we connect the lining tubes to the steam chamber in.
such a manner that the said tubes are sufficiently separated at and near their
junctions with the said chamber to allow the said products of combustion to pass:
between them at the said part. In some cases we thus provide for the passage of:
the products of combustion between alternate lining tubes along the whole length
of the boiler and in other cases we arrange a baffle between the fire bridge and the
chimney end of the boiler and provide as hereinbefore described for the passage of:
the products of combustion between those of the lining tubes which are between
the said baffle and the said end of the boiler the lining tubes at other parts of the
sides of the boiler being arranged close together or as near together as practicable
at all parts of their length. Where we use the baffle referred to we prefer to leave.
a sufficient space between it and the tubular coils on the furnace side of it to admit
of free passage of the products of combustion at the said part.
Dated this Twenty-sixth day of September 1893.
;
WILLTEMAN
W. T. WH
Agent for the Applicants.
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 consists of the improvements hereinafter described in such steam
boilers as consist essentially of tubes communicating with steam and water chambers'
and enclosed in a metal casing in the lower part of which is the furnace or fire box
5027
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 consists of the improvements hereinafter described in such steam
boilers as consist essentially of tubes communicating with steam and water chambers'
and enclosed in a metal casing in the lower part of which is the furnace or fire box
137

page_text: the objects of our said improvements being principally to avoid loss of heat through
the said casing.
According to our said improvements we arrange within the casing and at a slight
distance from the sides and ends thereof rows or walls of tubes each of which
communicates at one end with one of the water chambers and at the other end with
the steam chamber the said rows or walls of tubes forming virtually a lining to the
said casing by which free passage of heat from the furnace to the said casing is
prevented. Within the space enclosed by the said rows or walls of tubes (which
tubes are hereinafter termed the lining tubes) we arrange tubular coils each of
which coils is also connected at one end with one of the water chambers and at the
other end with the steam chamber. To provide for passage of the products of
combustion from the furnace to the chimney of the boiler we connect the lining
tubes to the steam chamber in such a manner that the said tubes are sufficiently
separated at and near their junctions with the said chamber to allow the said
products of combustion to pass between them at the said part. Where the furnace
extends the full length or nearly the full length of the boiler we thus provide for
the passage of the products of combustion between alternate lining tubes along the
whole length of the boiler and in cases where the furnace is of considerably less
length than the boiler we arrange a baffle between the fire bridge and the chimney
end of the boiler and provide as herein before described for the passage of the
products of combustion between those of the lining tubes which are between the
said baffle and the said end of the boiler the lining tubes at other parts of the sides
of the boiler being arranged close together or as near together as practicable at all
parts of their length. Where we use the baffle referred to we prefer to leave a
sufficient space between it and the tubular coils on the furnace side of it to admit
of free passage of the products of combustion at the said part.
Figures 1 and 2 of the accompanying drawings are sections of a boiler of the
kind herein before referred to showing the arrangement of the lining tubes and the
tubular coils where the furnace is of less length than the boiler. The section
shown on the left hand half of Figure 1 is taken on the line A. A Figure 2. The
section shown on the right hand half of Figure 1 is taken on the line B B Figure 2
and the section shown in Figure 2 is taken on the line CC Figure 1. In the
following description, the parts of the drawing are referred to by the letters marked
thereon. The same letters of reference indicate the same parts in both the figures
of the drawing.
a is the outer casing of the boiler. b is the chimney. c is the furnace. e is the
fire bridge. is the steam chamber. 99 are the water chambers and hhii are
the tubular coils connected to the said steam chamber and water chambers the
construction and general arrangement of all of which parts constitute no part of
our present invention. jj are the lining tubes at the furnace end of the boiler.
kk ll mm are the liuing tubes at the sides of the boiler and nn are the lining tubes
at the chimney end of the boiler. The tubes kk are placed as near together as
practicable at all parts of their length and the tubes 1 mm are similarly placed
except at and Dear their junctions with the steam chamber at which parts the said
tubes are
staggered" that is the junctions of the tubes with the steam chamber f
are above the level of the junctions of the tubes mm with the said steam chamber.
This arrangement of the tubes 11 mm at the said part is for the purpose of allowing
of the passage of the products of combustion from the furnace to the chimney the
said products of combustion passing between the said tubes 11 and mm as indicated
by the arrows. o is the baffle between the fire bridge and the chimney end of the
boiler which baffle is connected to the steam chamber and extends from the lining
tubes on one side of the boiler to those on the other side and causes the products of
combustion to descend after passing between the coils and over the fire-bridge
and to pass between the coils i before escaping to the chimney. The tubular coils
on the furnace side of the baffle o are placed a sufficient distance from it to admit
of free passage of the products of combustion between the said coils and baffle.
Where the furnace extends nearly or quite the full length of the boiler the

page_text: "
whole of the lining tubes at the sides thereof are or may be "staggered' or
connected to the steam chamber as hereinbefore described with reference to the
tubes 11 mm and for the purpose described.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that
we claim :-
First. The arrangement substantially as hereinbefore described of rows or walls.
of tubes between the tubular coils and the air casing of a steam-boiler of the kind
herein before referred to.
Secondly. The arrangement of a baffle between the fire-bridge and the chimney
end of a steam-boiler of the kind hereinbefore referred to and in which rows or walls.
of tubes are arranged between the coils and air casing substantially as hereinbefore
described and illustrated in the accompanying drawing.
Dated the Twenty-sixth day of June 1894
W. T. WHITEMAN,
Agent for the Applicants.