IMPROVEMENTS IN STEAM ENGINES
Year: 1884

page_text: I DAVID JOY of 8 Victoria Chambers Westminster Engineer do hereby declare
the nature of said Invention for "IMPROVEMENTS IN STEAM ENGINES" to be as
follows:-
My Invention has for its object to provide au arrangement of steam engine
especially adapted for marine engines whereby I obtain in such engines a simple
and practicable triple expansion arrangement conveniently adaptable to the large
size now becoming necessary.
According to my Invention I employ a high pressure cylinder and two medium
pressure cylinders or two high pressure cylinders and one medium pressure
cylinder each of these three cylinders being arranged tandem fashion in conjunction
with a low pressure cylinder so that each crank is driven by a low pressure
cylinder in conjunction with either a high pressure cylinder or a medium pressure
cylinder as the case may be-I prefer to arrange the said cylinders with one
high pressure cylinder between two medium pressure cylinders and above or below
these cylinders I arrange the three low pressure cylinders.
J. HENRY JOHNSON,
Agent for the said David Joy,
47, Lincoln's Inn Fields, W.C.

page_text: เ
I DAVID JOY of 8 Victoria Chambers Westminster Engineer do hereby declare
the nature of my invention for "IMPROVEMENTS IN STEAM ENGINES" and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
My Invention has for its object to provide an arrangement of Steam Engine
especially adapted for marine engines whereby I obtain in such Engines a simple
and practicable triple expansion arrangement conveniently adaptable to the large
size now becoming necessary.
According to my Invention I employ a high pressure cylinder and two medium
or intermediate pressure cylinders or two high pressure cylinders and one medium
or intermediate pressure cylinder each of these three cylinders being arranged
tandem fashion in conjunction with a low pressure cylinder so that each crank
is driven by a low pressure cylinder in conjunction with either a high pressure
cylinder or a medium or intermediate pressure cylinder as the case may be-
I prefer to arrange the said cylinders with one high pressure cylinder between two
medium or intermediate cylinders and above or below these cylinders I arrange
the three low pressure cylinders.
My Invention will be clearly understood by reference to the accompanying
drawing Where Figure 1 represents a set of Engines arranged according to my
Invention with the high pressure cylinder A above in the middle, and on each side
of it a medium or intermediate pressure cylinder B B, while below are the three
low pressure cylinders C. C. C or the high pressure cylinder may be at one end
and the two intermediate cylinders be one in the middle and the other at the other
end.
Or as in Figure 2 there may be two high pressure cylinders A A one at each
end, with the intermediate cylinder B between them as shewn and the three low
pressure cylinders C. C. C below; or the two high pressure cylinders may be ranged
alongside of each other with the intermediate cylinder outside at one end.
Figure 3 represents an end view of such engines. Of course the arrangement
may be reversed and the three low pressure cylinders may be placed above while
the high pressure and intermediate cylinders may be placed below or the whole
system may be laid horizontally or diagonally.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
In triple expansion Engines placing three low pressure cylinders in a row, and
arranging the high pressure and medium or intermediate pressure cylinders in
tandem fashion with the said low pressure cylinders.