Improvements in Horizontal Tubular Boilers.
Year: 1892

page_text: Date of Application; 26th May, 1892
Complete Specification Left, 27th Feb., 1893-Accepted, 6th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Horizontal Tubular Boilers.
We, LYNCH WHITE Junior, and WILLIAM YEATS BAKER, trading as The
Thames Bank Iron Company, of Upper Ground Street, Blackfriars, London S.E.
Engineers do hereby declare the nature of this invention to be as follows:-
This invention refers to tubular hot water generators of the kind described in our
Specifications. of 1888 No. 9090.
In addition to the eleven horizontal pipes shown over the fire in that Specification
we now add a further series or range of similar pipes above the others, and above
the present front and back waterway end castings, we place two additional end
castings to connect the said pipes together.
On the lower side of these end castings we form two spigots to fit into two
recessed sockets which we place to receive the said spigots on the top of the present
end castings.
We also attach lugs and hinged bolts to connect the new end castings to the
old ones.
Between the spigot and socket connections before described, one of which is at
each end of the casting, we leave recessed or open space between the two castings,
and we cast ledges or beads to the edges of such opening to which a sliding door
can be fitted. This opening is to form a flue-door for the purpose of affording
access to the pipes.
Above each horizontal layer of pipes we lay flat iron plates, with open spaces at
alternate ends, so as to cause the ascending heated gases of the fire to travel to and
fro along the pipes, in zigzag fashion, until they escape eventually into the flue.
In this way, we utilise more of the heat of the fire, and thus cause greater
economy in the consumption of fuel.
Dind this weth I- SM 1000
S. S. BROMHEAD,
97, Newgate Street, London, Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Horizontal Tubular Boilers.
We, LYNCH WHITE, Junior, and WILLIAM YEATS BAKER, trading as The
Thames Bank Iron Company, of Upper Ground Street, Blackfriars, London, S.E.
Engineers, 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 tubular hot water generators similar to the type
described in our Specification No. 9090 of 1888, and has for its object the provision
of means whereby the heating surface of the boiler may he increased or decreased
with great facility and also the heating efficiency of the tube surface be increased.
By this invention if the boiler requires to be larger, by reason of having to heat a
longer range of pipes or other cause, it need not be replaced by another boiler of
a larger size but additional heating surface can be added to the old boiler.
Our invention consists in the combination with an ordinary tubular boiler of the
type hereinafter referred to of a series or further ranges of pipes mounted in water
way ends, with means for the detachable attachment. of the further series to the
boiler through the water way ends, so that the added series may form a part of the
boiler proper, and also in the arrangement of baffle plates disposed between the layers
[Price Bd1

page_text: COUTES OF The heated gases in a zigzag path up throug
the layers of tubes.
In order that our invention may be the better understood we will now proceed to
describe the same in relation to the drawings hereunto annexed, reference being
had to the letters and figures marked thereon.
Like letters refer to like parts in the various figures.
Figure 1 is a perspective elevation of one form of our improved boiler, with the
baffle plates on the top row of tubes shown in dotted lines for the purpose of
clearness.
Figure 2 is a small diagrammatic view of a boiler in elevation having three rows
of tubes with baffle plates between each.
The boiler as made up to the present has consisted of a set of tubes A mounted in
end water way castings B B¹ to form the fire box of the boiler, the top tubes
usually extending a certain distance beyond the furnace end. We now add to this
boiler one or more further series or ranges of pipes C supported in water way
castings D which rest upon and make joint with the lower water way castings B.
Means of communication are provided between the castings where they join one
another, to permit of the circulation of the water within the boiler. The jointing
together is effected by hinged bolts E which engage with the two castings B and D
so as to draw them together.
We have shown in Figure 1 the added pipes as one complete series of pipes
bolted together as a complete structure which can be removed as a whole from the
other part of the boiler, the pipes being arranged in a double row, the upper pipes
being arranged over the spaces in the lower.row. The sockets for connections
with the hot water circulating pipes are arranged at F on the back casting D.
We can arrange any number of these complete ranges of pipes one above the other,
the intermediate series having no means for connection other than that to connect
them one to the other and to the boiler as used formerly.
In order that the boiler shall absorb as much heat as possible from the heated
gases as they pass from the furnace to the chimney we provide above the horizontal
layers of pipes, baffle plates G so arranged as to leave a clear passage between the
tubes at alternate ends so as to cause the ascending heated gases of the fire to
travel to and fro along the pipes in zig-zag fashion until they escape eventually into
the flue.
In Figure 2 we show the baffle plates G arranged with three series or ranges of
upper pipes. We have shown the baffle plates as flat plates laid transversely
across the pipes but it is quite obvious that baffle plates can be arranged in many
equivalent ways without departing from the essence of our invention, such as for
example longitudinal plates or bars laid in the space between two pipes, but of such
a width or formation as not to drop therethrough.
Where the end water way castings abut against one another we form a recess H
or we may make the connection by forming a spigot on one part and a socket on
the other part, so as to leave an open space between the castings which we cover by
a door J or we may cast ledges or beads to the edges of such opening to which a
sliding door can be fitted, in order to afford means of access to the internal pipes
to remove soot or for examination.
It is clear that with this type of boiler constructed according to our invention, a
single size and pattern of fire box portion will serve by the addition of more or
less of the series or ranges of tubes to form boilers ranging through very wide
ranges of heating capacity and that should it be necessary at any time to increase
the heating capacity it can be readily done by the addition of further series
of pipes.
i
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1.. In a horizontal tubular hot water generator the combination of the fire box

page_text: portion formed by tubes, with one or more complete series or ranges of tubes
detachably attachable to the said fire box portion and means for effecting the
attachment of the parts one to the other and communication for the proper
circulation of the water throughout the whole structure substantially as described.
2nd. In a horizontal tubular hot-water generator the tubular fire box portion
having end water way castings in combination with a series of pipes mounted in
end water way castings as a complete structure adapted to be detachably attached
to and communicate by water tight joints with the end waterway castings of the
fire box portion and means for effecting the attachment, substantially as described.
3rd. In a tubular hot water generator the arrangement of baffle plates between
each successive layer of tubes adapted to leave an opening at alternate ends to
permit the passage of the heated gases up along and between the tubes in a zigzag
path, substantially as described.
4th. The arrangement and construction of a hot water generator, substantially
as described herein and illustrated by the accompanying drawings.
Dated this 27th day of February 1893.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicants.