Improvements in Triple Expansion and Quadruple Expansion Steam Engines.
Year: 1895

page_text: Date of Application, 2nd Oct., 1895
Complete Specification Left, 2nd July, 1896-Accepted, 22nd Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in Triple Expansion and Quadruple Expansion Steam
Engines.
I, GEORGE SCHOLEY YOUNG of 50 Clapton Common London, Engineer do
hereby declare the nature of this invention to be as follows:-
My invention has reference to such triple expansion and quadruple expansion
steam engines which are required to develop greatly differing powers at different
times, as for instance with the engines of ships of war which have to be of
sufficient size to propel the vessel at times at a high or maximum speed and at
other times have to work at a fraction of the maximum power when propelling the
vessel at an ordninary cruising speed and the object of my said invention is to
provide means for changing the mode of action of the engines so as to suit the
aforesaid requirements whereby an economy in steam consumption is obtained
when the engines are developing the lower power. According to one part of
my invention when applied to the triple expansion system I employ one bigh
pressure, one intermediate pressure and two low pressure cylinders and provide
valves to close the steam admission and exhaust passages or pipes of the inter-
mediate pressure cylinder and provide a passage or pipe to convey the exhaust
steam from the high pressure cylinder into one of the low pressure cylinders and
also a valve for closing said passage or pipe when the engines are to develop the
larger powers. When both low pressure cylinders exhaust into one condensing
apparatus I provide a valve in the exhaust pipe or passage of that low pressure
cylinder which is not to be used. The action of this combination eliminates the
use of the intermediate pressure cylinder and of one of the low pressure cylinders
and allows the high pressure cylinder and one low pressure cylinder only to
perform the work for developing the said lower power. According to another
part of my invention when applied to the quadruple expansion system, I provide
valves and pipes or passages generally as before described but so arranged that
the high pressure cylinder and the second intermediate pressure cylinder only
perform work while the first intermediate pressure cylinder and the low pressure
cylinder are eliminated from action: In this application valves and passages are
fitted between the second intermediate pressure cylinder and the condenser and
also between the low pressure cylinder and the condenser in such a manner that
either may be opened or closed as required for working at the high or low power.
With certain proportions of cylinders in quadruple expansion engines I combine
the high pressure with one or more low pressure cylinders and eliminate the action
of the first and second intermediate cylinders.
Dated this 2nd day of October 1805
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Triple Expansion and Quadruple Expansion Steam
Engines.
I, GEORGE SCHOLEY YOUNG, of 50 Clapton Common, London, Engineer, 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 :-
My invention has reference to such triple expansion and quadruple expansion
steam engines which are required to develop greatly differing powers at different
times, as for instance, engines of ships of war which have to be of sufficient size
to propel the vessel at times at a high speed and at other times have to work at a
fraction of the maximum power when propelling the vessel at an ordinary cruising
speed and the object of my invention is to provide means for changing the mode
of action of the engines so as to suit the aforesaid requirements, whereby an economy
in steam consumption is obtained when the engines are developing the lower
power.
Fig. 1 of the accompanying drawing is a diagrammatic side view and Fig. 2 a
plan view of the cylinders of a triple expansion engine constructed according to
this invention. I employ one high pressure cylinder A, one intermediate pressure
cylinder B, and two low pressure cylinders C and D. Steam from the boilers is
admitted to the high pressure cylinder A by the pipe E, and F is the exhaust pipe
to the intermediate cylinder B. K and L are valves for carrying out the object of
the invention so that the exhaust steam. from the high pressure cylinder shall be
able to pass into and act as desired either in one of the low pressure cylinders only
(for low power) or into the intermediate cylinder B and thence into the cylinders Ċ
and D (for high power).
Fig. 3 is a diagrammatic sectional view of one suitable arrangement of the
valves L and K but I only give this as an example as other equivalent arrangements
may be applied.
Gis the pipe from the box of the valves K L to the first low pressure cylinder C,
and I is the exhaust pipe from the intermediate cylinder B to the second low
pressure cylinder D. I is the exhaust pipe from the cylinder C to the condenser
and is the exhaust pipe from the cylinder D to the condenser. If the cylinders C
and D exhaust into one condensing apparatus I provide a valve in the exhaust
pipe or passage of the cylinder D (which cylinder is not to be used for the low
power).
The valve K, Fig. 3, is a double faced valve which can seat itself either on the
Beat B so as to close to the passage B leading to the intermediate cylinder B in
which case the exhaust steam from the high pressure cylinder A is not to enter the
intermediate cylinder B, but to pass directly into a low pressure cylinder (for the
low power) or the valve K can seat itself on the seat B³ in which case the steam
from the high pressure cylinder. A' enters the intermediate cylinder B (for the high,
power).
The valve L is either on its seat (for the low power) or open (for the high
power).
With the valves K and L in the position shown in Fig. 3 the engine is working
ct le power, the intermediate cylinder B and the low pressure cylinder D being
cut off or out of action. Their connecting rods may then also be disconnected
from their cranks.
When my invention is applied to the quadruple expansion system I provide
valves and pipes or passages generally as before described but so arranged that the
high pressure cylinder and the second intermediate pressure cylinder only perform
work while the first intermediate pressure cylinder and low pressung cylinder are

page_text: eliminated from action. In this application valves and passages are fitted between
the second intermediate cylinder and the condenser and also between the low
pressure cylinder and the condenser in such manner that either may be opened or
closed as required for working at the high or the low power.
With certain propor-
tions of cylinders in quadruple expansion engines I combine the high pressure
cylinder with one or more low pressure cylinders and eliminate the action of the.
first and second intermediate cylinders.
Having now particularly described and ascertained the nature of my said inven-.
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The application and use in triple and quadruple expansion engines of valves.
and pipes or passages arranged and operating substantially as described for
enabling said engines to be worked as desired at greatly differing powers according
to the position of the said valves whereby either all the cylinders are in action for
the high power, or only the high pressure cylinder and a low or intermediate
cylinder are in action for the low power.
2. The construction of triple expansion engine with valves and pipes substantially
as described with reference to the drawings.
D
1000
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.