IMPROVEMENTS IN STEAM-BOILERS."
Year: 1882

page_text: LETTERS PATENT to George William Hawksley and Matthew Wild, both of
Sheffield, in the County of York, for an Invention of "IMPROVEMENTS IN
STEAM-BOILERS."
PROVISIONAL SPECIFICATION left by the said George William Hawksloy
and Matthew Wild at the Office of the Commissioners of Patents on the
25th April 1882.
GEORGE WILLIAM HAWKSLEY and MATTHEW WILD both of Sheffield in the
County of York. "IMPROVEMENTS IN STEAM BOILERS."
The said Invention relates to improvements in steam boilers of the vertical
multitubular type wherein the tubes are beneath the water line.
One arrangement of boiler according to the said Invention consists as follows:-
The tubes are arranged on the return principle; the furnace is inside the boiler
at the lower end thereof and has one side flattened to constitute a tube plate.
To the side of the boiler is attached a cylindrical projection which carries another
tube plate and at the extreme of the said projection beyond this tube plate is a
combustion chamber. At the opposite side of the boiler is affixed a tube plate and
covering this is the smoke box carrying the chimney. Tubes pass from the tubo
plate of the furnace to the lower part of the tube-plate of the tubular projection
the said tubes giving communication from the furnace to the combustion chamber
other tubes pass from the upper part of the last mentioned tube plate giving
communication from the combustion chamber to the smoke box. The tubes are
preferably slightly inclined upwards in the direction of the course of the products
to the chimney.
According to another arrangement the tubes are situated horizontally above the
internal furnace and are carried by oval tube plates of box form attached to the
shell of the boiler so that the water enters the said boxes the said boxes and
the tube plate forming their end being situated entirely outside the general line of
the shell of the boiler the one box carrying at its outward side or combustion
chamber into the lower part of which opens the flue from the furnace. The other
of the said boxes on the other side of the boiler carries at its outer end the smoke
box leading to the chimney tubes pass from one to the other of the aforesaid tube
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page_text: plates outside the general line of the shell of the boiler giving communication from
the combustion chamber to the smoke box so that the tubes are as long as or
longer than the diameter of the boiler and the water space and heating surface are
largely increased.
According to another modification the internal fire box communicates by a trunk
or flue with the combustion chamber outside the one side of the furnace and from
the upper part of this combustion chamber tubes open into the lower part of a
second combustion chamber outside the other side of the boiler. From the upper
part of this second combustion chamber other tubes pass to a smoke box above the
first combustion chamber and thence to the chimney. Two or more series of tubos
may be employed in the same way for long boilers. The tube plates which form
the inner sides of the combustion chamber and smoke boxes are outside the general
line of the boiler so that the tubes have a length as great or greater than the
dinimeter of the body of the boiler and the water space is increased by the extra
space given by this arrangement of the tube plates.
The combustion chamber of the boilers may be protected by refractory material
and the smoke boxes and other convenient parts may be provided with doors to
give easy access for cleaning and repair.
-By-the-arrangements described a greatly increased water space and heating
surface-of-the-tubes-is.obtained.
According to another arrangement the internal furnace has one-side flattened to
form a tube plate at an angle with the vertical line of the boiler. The tube plate
on the tubular projection from the boiler is at a similar inclination so that the
tubes being fixed at their respective ends into these tube plates form a communi-
cation rising rapidly-or-at-a-considerable angle from the internal fire box to
through the external projection to the smoke box carried at the end-of-the-said-
projecting part. The said projecting part forms-an addition to the water space of
the boiler.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George William Hawksley and Matthew Wild in the Great Seal
Patent Office on the 26th July 1882.
GEORGE WILLIAM HAWKSLEY and MATTHEW WILD both of Sheffield in the
County of York. "IMPROVEMENTS IN STEAM BOILERS."
The said Invention relates to improvements in steam boilers of the vertical
multitubular type wherein the tubes are beneath the water line.
We will describe our Invention with reference to the accompanying Drawings.
One arrangement of boiler according to our said Invention is illustrated in
elevation partly in section in Figure 1 in vertical section in Figure 2 and in
horizontal section in Figure 3.-It consists as follows-The tubes are arranged on
the return principle-The furnace A is inside the builer at the lower end thereof
and has one side at a flattened to constitute a tube plate. To the side of the boiler
is attached a cylindrical projection B which carries another tube plate b of the
peculiar forin and construction represented in the Drawings and at the extreme of
the said projection beyond this tube plate is a combustion chamber C. At the
opposite side of the boiler is affixed a tubo plate e of an oval or elongated form
likewise of particular construction as will be more readily understood by reference
to the Drawings and covering this is the smoke box F carrying the chimney G.
Tubes D pass from the tube plate a of the furnace to the lower part of the tube
plate b of the tubular projection B the said tube D giving communication from
the furnace A to the combustion chamber C. Other tubes E pass from the upper
part of the tube plate b giving communication from the combustion chamber C
to the smoke box F. The tubes D and E are preferably slightly inclined upwards
in the direction of the course of the products of combustion from the furnace to the
chimney.
Figures 4, 5 and 6 are corresponding views of another arrangement of boiler
constructed according to our Invention wherein the tubes E are situated hori-
zontally above the internal furnace A and are carried by oval tubes plates b³ es
forming boxlike projections attached to the shell of the boiler so that the water
in the boilers enters also the said boxes the tube plates forming their ends being
situated entirely outside the general line of the shell of the boiler as seen clearly
in Figure 6. The one box carrying or bas formed at its outward side a combustion
chamber C into the lower part of which opens the fluo Ds from the furnace A-
The other of the said boxes on the other side of the boiler carries or has formed at
its outer. end a smoke box F leading to the chimney G. The tubes E pass from
one to the other of the aforesaid tube plates of the boxes be giving communi-
cation outside the general line of the shell of the boiler from the combustion
chamber C to the smoke boxes F so that the tubes being as long as the diameter
of the boiler the water space and heating surface are largely increased.
Figures 7, 8 and 9 are corresponding views of another modification of boiler
constructed according to our Invention. The internal fire box A communicates by
a trunk or fue D with the combustion chamber outside the one side of the boiler
and from the upper part of this combustion chamber C tubes E³ open into the
lower part of a second combustion chamber C outside the other side of the boiler.
From the upper part of this second combustion chamber C other tubes E³ pass to
the sinoke box above the first combustion chamber C and thence pass to the
chimney G.-Two or more series of tubes may be employed in the same way for
long boilers.-The tube plates be which form the inner sides of the combustion
chamber and smoke boxes are outside the general line of the boiler being formed
on or of box-like projections resembling those shown and described with regard to

page_text: the arrangement, Figures 4, 5 and 6 so that the tubes E Es have a length greater
than the diameter of the body of the boiler and the water space is increased by the
extra space given by this arrangement of the tube plates substantially as in the
said arrangement Figures 4, 5, and 6. The combustion chamber of the boilers
may be protected by refractory material as is shown in the Drawings and the
smoke boxes and other convenient parts may be provided with doors to give easy
access for cleaning and repairing as is also shown in the Drawings.
By the arrangements described a greater water space and heating surface of the
tubes is obtained than in vertical boilers as hitherto constructed.
Figures 10, 11 and 12 are corresponding views of another arrangement of boiler
constructed according to our Invention. The internal furnace A has one side
flattened to form a tube plate a³ at an angle with the vertical line of the boiler.
The tube plate h on the tubular projection H from the boiler is at a similar
inclination so that the tubes I being fixed at their respective ends into these tube
plates a³h form a communication rising rapidly or at a considerable angle from
the internal fire-box A to and through the external projection H to the smoke box
carried at or formed on the end of the said projecting part. The said projecting
part it will be seen forms a considerable addition to the water space of the boiler.
The tubes in all-the-arrangements-can-be-readily_cleaned_by_opening_doors
suitably arranged for example as shown in the several Figures of the Drawings..
Having now described and particularly ascertained the nature of our said
Invention and the manner in which the same is or may be used or carried into.
effect we would observe in conclusion that what we consider to be novel and original
|_ and therefore claim as the Invention secured to us by the herein before in part
recited letters Patent is
First The arrangement and combination of parts constituting the steam
boiler herein before described and illustrated in Figures 1, 2 and 3 of the
accompanying Drawings.
Second The arrangement and combination of parts constituting the steam
boiler hereinbefore described and illustrated in Figures 4, 5 and 6 of the
accompanying Drawings.
Th
The CNRSomond
and
combination of narta constituting the steam