Connection with Compound Steam Engines.
Year: 1885

page_text: Connection with Compound Steam Engines.
I ALEXANDER MAC LAINE of No 1 Queens Elms Belfast in the County of
Antrim Ship owner do hereby declare the nature of my said invention for
IMPROVEMENTS IN FEED WATER HEATING ARRANGEMENTS IN CONNECTION WITH
COMPOUND STEAM ENGINES to be as follows:-
-
I construct Steam Engines with a series of three four five or more cylinders in
which the steam is expanded three four five or more times and the last of the series
I make a low pressure or condensing cylinder and in combination with any of the
aforesaid arrangements I abstract part of the steam of the engine after it has passed
through several cylinders and just before entering the last or low pressure cylinder.
and I convey said steam by means of a copper pipe or other means of conveyance
into the boiler feed water situated between the hotwell and the boiler feed pump
and I arrange the injection of this steam into a receiver on the feed water pipe and
with a rose pipe or injection pipe or other apparatus for facilitating the condensa-
tion of this steam in the feed water so that both the latent and sensible heat of the
steam shall be, so far as possible, carried back into the boiler with the feed water.
And I do not limit myself to abstracting the part steam as aforesaid from the
exact position in the series of cylinders as described but may abstract it from other
parts of the series; and the number of steam expansions, if three or more as afore-
said, need not necessarily be the same as the number of the cylinders.

page_text: Connection with Compound Steam Engines.
I ALEXANDER MAC LAINE of No 1 Queens Elms, Belfast, in the County of Antrim,
Shipowner, do hereby declare the nature of my invention for IMPROVEMENTS IN
FEED WATER HEATING ARRANGEMENTS IN CONNECTION WITH COMPOUND STEAM
ENGINES and in what manner the same is be performed, to be particularly
described and ascertained in and by the following statement:-
I construct steam engines with three, four, five or more cylinders in which the
steam is expanded three, four, five or more times and the last of the series of
cylinders I make of the low pressure or condensing type and in combination with
any of the aforesaid arrangements I abstract part of the steam of the engine after
it has passed through several cylinders and just before entering the last or low
pressure condensing cylinder, and I.convey said steam by a copper pipe or other,
conveyance into the boiler feed water between the hotwell and the boiler feed
pump, arranging its introduction into a receiver or condenser there through a rose
pipe or injection pipe or other apparatus for facilitating the condensation of this
steam in the feed water, so that the heat in same shall so far as possible be carried
back into the boiler with the feed water; And in order that my said Invention'
inay be more fully described and understood I refer to the sheet of drawings here-
unto annexed representing a plan of the arrangement in a quadruple expansion
engine, and in which a b c & & are four cylinders of which a is the first of the
series into which the steam enters and is there expanded passing from thence to b
where it is again expanded passing from thence to c where it is again expanded
and passing from thence to the low pressure or condensing cylinder de is a pipe.
which abstracts part of the steam before it enters the low pressure or condensing
cylinder and conveys it through the rose pipe or injection pipe f into the receiver
or condenser g situated on the line of communication between the hotwell h and
the pipe leading to the boiler feed pump placed where convenient, with the whole
so arranged that the boiler feed pump in drawing water from the hotwell / through
apertures m in the rose pipe or injection pipe f draws along with it the part steam
aforesaid and same becomes incorporated with the feed water in the receiver or
condenser g and condensed, therein passing into the steam boiler or boilers of the
steam engine through the boiler feed pump or pumps; and I do not limit myself
to the precise arrangement as described and shown on the drawings, as the cylinders
aforesaid may be placed in any positions with regard to each other and two
cylinders may be substituted for one in any part of the series, and I do not limit
myself to the precise form of rose pipe or injection pipe as shown, and I also apply
the condensing arrangement as aforesaid in combination with a triple expansion,
or quintuple expansion series of cylinders with the same degree of non limita-
tion as to the number and position of the cylinders as regarding the quadruple
arrangement as aforesaid,

page_text: And having now ascertained the nature of my said Invention and in what
manner the same is to be performed I declare that what I claim is
First. The construction of a quadruple expansion engine with four or more
cylinders combined with an arrangement for condensing part of the steam direct
into the boiler feed water substantially as described and shown in the drawings
hereunto annexed.
Second. The construction of a triple expansion engine with three or more
cylinders combined with an arrangement for condensing part of the steam direct
into the boiler feed water substantially as described and shown in the drawings
hereunto annexed,
Third. The construction of a quintuple expansion engine with five or more
cylinders combined with an arrangement for condensing part of the steam direct
into the boiler feed water substantially as described and shown in the drawings
hereunto annexed.
And Fourth. The use of a rose pipe or condenser pipe with triple, quadruple, or
quintuple expansion engines, expanding towards its mouth like a trumpet and
arranged with apertures to admit the feed water for condensing low pressure
steam, constructed and applied substantially as described and shown in the
drawings hereunto annexed."