IMPROVEMENTS IN AND APPLICABLE TO COMPOUND ENGINES
Year: 1885

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We HENRY CROMPTON ASHLIN of 8B Rumford place Liverpool Lancashire and
HENRY TURNER 6 Barnard Road Birkenhead Cheshire Engineers do hereby declare
the nature of the said invention, for "IMPROVEMENTS IN AND APPLICABLE TO
COMPOUND ENGINES " to be as follows:-
The object is to provide means whereby the direct connection between the High
and Low pressure Cylinders is broken thus preventing the High Pressure Cylinder
or Cylinders being exposed to the low temperature of the Low Pressure Cylinder
or Cylinders due to their connection with the Condenser & and the temperature
of the steam in its passage from the high to the low pressure cylinder or cylinders
in two or more cylinder engines is maintained at more uniform temperature than
has hitherto been done thereby obtaining results with a two or more cylinder
engine and double expansion equivalent or nearly so to those now obtained with
engines baving three or more cylinders and multiple expansion.
The invention consists essentially in interposing between the high and low
pressure cylinders apparatus for preventing the low temperature of the low pressure
cylinder or cylinders and condenser from being communicated to the high pressure
cylinder or cylinders.
Under one modification we construct a chamber or vessel with a large number
of metallic or other passages or with leaves or globular or other heat retaining
masses The steam on its way from the high to the low pressure cylinders is
caused to pass through the said chamber and imparts some of its heat to the said
leaves tubes or masses in such manner that when the low pressure cylinder or
cylinders are in communication with the said chamber the said leaves tubes
or masses give out heat and maintain the temperature of the chamber nearly
uniform.
Under another modification steam direct from the boiler is employed to assist in
maintaining a uniform temperature in the said chamber.

page_text: We HENRY CROMPTON ASHLIN of 8B Rumford Place Liverpool Lancashire, and
HENRY TURNER 6 Barnard Road Birkenhead Cheshire, 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 :-
The object is to provide means whereby the direct connection between the high
and low pressure cylinders is broken, thus preventing the high pressure cylinder
or cylinders being exposed to the low temperature of the low pressure cylinder or
cylinders due to their connection with the condenser & And the temperature of
the steam in its passage from the high to the low pressure cylinder or cylinders
in two or more cylinder engines is maintained at more uniform temperature than
has hitherto been done, thereby obtaining results with a two or more cylinder
engine and double expansion equivalent or nearly so to those now obtained with
engines having three or more cylinders and multiple expansion.
The invention consists essentially in interposing between the high and low
pressure cylinders apparatus for preventing the low temperature of the low pressure
cylinder or cylinders and condenser from being communicated to the high pressure
cylinder or cylinders, the action of the apparatus being such in the most approved
forms that any condensed steam is vapourized before it reaches the low pressure
cylinder or cylinders.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a horizontal, fig. 2 a vertical, and fig. 3 a transverse section of a simple
form of apparatus under our invention. a is a chamber or vessel connected to the
high pressure cylinder b by a way c and to the low pressure cylinder d through a
way e. series of partitions or leaves attached to the sides of the chamber, and
to the central stay g. It will be obvious that as the steam passes through the said
chamber in its passage from the high to the low pressure cylinder it will impart
some of its heat to the leaves or partitions f so that when the low pressure cylinder
or cylinders is or are in communication with the said chamber the leaves or
partitions will give out heat and maintain the temperature of the chamber nearly
uniform; also in its passage revapourizing any condensed steam that otherwise
would pass to the next cylinder.
Figs. 4 and 5 are horizontal sections of a modification of apparatus in which
single spiral plates h are used instead of a series of leaves or partitions f.
Fig. 6 is a horizontal, and fig. 7 a vertical section of a modification of apparatus
in which a series of tubes i pass through the chamber a and communicate at each
end with steam spaces j. The said spaces and the steam generator are in com-
munication through the tubes i and way j k condensed steam draw off pipe,
I partitions in the chamber a to prolong the travel of the steam therethrough.
It will be obvious that in this modification the steam will be maintained at a
nearly uniform temperature.

page_text: Fig. 8 is a modification of apparatus in which steam from the boiler assists in
maintaining the steam passing from the high to the low pressure cylinders at
uniform temperature.
It will be obvious that many modifications of apparatus may be made without
departing from our invention.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that what
we claim is
First. Interposing between the high and low pressure cylinders of steam engines
apparatus for regulating the temperature substantially as setforth.
Second. In combination with the high and low pressure cylinders of steam
engines chambers having leaves or other heat retaining masses substantially as
setforth.
Third. In combination with the high and low pressure cylinders of steam engines
chambers constructed and connected substantially as setforth.