Improvements in Single Aoting Multiple Expansion Motive Power Engines.
Year: 1893

page_text: Date of Application, 28th Jan., 1893
Complete Specification Left, 30th Oct., 1898-Accepted, 20th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Single Aoting Multiple Expansion Motive Power
Engines.
I, JAMES WILLIAM RESTLER of 68 Linden Grove Nunhead in the County of
Surrey Engineer do hereby declare the nature of my invention to be as follows :-
My invention relates principally to engines having two sets of cylinders the
cylinders of each set being arranged tandem fashion, the motive fluid (I will refer
to it as steam) being so distributed that the pressure which is transmitted to the
crank pin is always in one direction thus constituting a single acting engine and the
object of my invention is to provide a single valvular arrangement for effecting
the distribution for both sets of cylinders in a simple and efficient manner.
The steam from the boiler is admitted to the first cylinder from whence after
forcing the piston to the end of its stroke it is passed through the valve case and a
suitable port or pipe to a receiver, or directly onto an annular piston in the second
cylinder the piston area of which is greater than that of the piston in the first
cylinder and the direction of motion of which when receiving such steam, is in the
same direction as the first piston when receiving steam from the boiler.
After the second piston has completed its stroke the steam is then passed to the
other side of this piston the area of which is equal to the full diameter of the
cylinder less the area of the piston rod.
The communicating valve between the opposite sides of this second piston
remains open until the said piston has nearly reached the end of its return stroke,
and the pressure per square inch of the steam on both sides of the piston is
thus equal and the excess of area of the one side of the second piston over the other
or annular side of the same piston, assists the first piston to expel its steam, and
tends to relieve or remove the pressure that would otherwise come upon the crank
pin in the return stroke.
In engines constructed after the manner of this invention the sets of cylinders
are arranged side by side and their piston rods act on a crank shaft with two
cranks, which are set opposite or at an angle of 180 degrees relatively to each
other. A single valvular arrangement is provided to control the admission and
release of steam to and from all the cylinders of the engine the valves of the said
arrangement being of a flat, a cylindrical or other convenient form and deriving
their motion in any suitable way from the crank shaft for instance from an ordinary
excentric gear or from a dynamic gear worked from the connecting rod.
The valvular arrangement consists of a number of pellets or valves working in a
casing from which a number of ports or passages lead to the various cylinders.
Numbering the ports or passages in ordor, starting at the high pressure or upper
end of the valve casing, from 1 to 12 inclusive, and the pellets or valves from A
to G inclusive, and calling the high pressure cylinder intermediate aunular cylinder
and low pressure cylinder on the one side of the engine H. I & J respectively, and
the high pressure intermediate, and low pressure cylinders on the other side of the
engine KL & M respectively, the valvular arrangement is such that the distribution
of the steam during the working of the engine is as follows:-
Steam from the boiler enters port 2 into an annular space between pellets A and B
and enters by port 3 to the high pressure oylinder H and at the same time the steam
from the high pressure cylinder K is exhausting through the valve between pellets A
and B through port 1 into port 4 which is connected by a passage or pipe with port 7
and from thence between pellets C and D through port
into the annular inter-
mediate cylinder I. During this time the annular intermediate cylinder ↳ ią

page_text: exhausting through porte 8 and 9 between pellets D and E into low pressure
cylinder M and the low pressure cylinder J is exhausting through porta 11 and 10
between pellets E and F to the condenser or into the atmosphere.
At the return stroke of the pistons the high pressure cylinder K receives stcam
from port 2 through port 1 and at the same time high pressure oylinder H is
exhausting through ports 3 between pellets B and C into ports 4 and 7 and from thonce
between pellets D and E through port 8 into the annular intermediate cylinder L.
The intermediate cylinder I is at the same time exhausting through port 6 between
pellets C and D into port 5 which is connected with port 12 by a passage or pipe
and from port 12 the steam passes between pellets Faud G through port 11 to low
pressure cylinder J and low pressure oylinder M is exhausting through port 9 between
pellets E and F to port 10 and thence to the condenser or into the atmosphere.
Dated this 28th day of January 1893.
·
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
•
COMPLETE
SPECIFICATION.
Improvements in Single Acting Multiple Expansion Motive Power
Engines.
I JAMES WILLIAM RESTLER of 68 Linden Grove, Nunhead in the County of
Surrey 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 relates principally to engines having two sets of cylinders, the
cylinders of each set being arranged tandem fashion, the motive fluid (I will rafor
to it as steam) being so distributed that the pressure which is transmitted to the
crank pin is always in one direction thus constituting a single acting engine and
the object of my invention is to provide a single valvular arrangement for effecting
the distribution for both sets of cylinders in a simple and efficient manner.
The steam from the boiler is admitted to the first cylinder from whence, after
forcing the piston to the ond of its stroko, it is passed through the valve case and n
suitable port or passage directly onto an annular piston in the second cylinder, the
piston area of which is greater than that of the piston in the first cylinder and the
direction of motion of which when receiving snch steam is in the same direction as
the first piston when receiving steam from the boiler. After the second piston has
completed its stroke the steam is passed to the other side of this piston the area of
which is equal to the full diameter of the cylinder less the area of the piston rod.
The communicating ports between the opposito sides of this second piston remain
open until the said piston has nearly reached the end of its return stroke, and the
pressure por square inch of the steam on both sides of the piston is thus equal, and
the excess of arca of the one side of the second piston over the other or annular
side of the same piston, assists the first piston to expel its steam and tends to
relieve or remove the pressure that would otherwise come upon the crank pin in
the return stroke.
In engines constructed after the manner of this invention the sets of cylinders
are arranged side by side and their piston rods act on a crank shaft with two
cranks which are set opposite or at an angle of 180 degrees relatively to each other.
A single valvular arrangement is provided to control the admission and release
of steam to and from all the cylinders of the engine the valves of the said
arrangement being of a cylindrical or other convenient form and deriving their
motion in any suitable way from the crank shaft, for instance from an ordinary
eccentric gear, or from a dynamic gear worked from. the connecting rod.
The valvular arrangement consists of a number of pallets or valves working in a
casing from which a number of ports or passages lend to the various oylinders,

page_text: And in order that my invention may be fully understood I shall now proceed
more particularly to describe the same and for that purpose shall refer to the
several figures on the annexed sheets of drawings the same letters of roference
indicating corresponding parts in all the figures.
Figures 1 and 2 aro vertical sections at right angles to each other and
Figure 3 a horizontal section of a motive power engine constructed according to
my invention.
Figures 4 and 5 are vertical sections at right angles to each other of the upper
part of a similar engine shewing a modified arrangement of the steam distributing
passages and
Figures 6 and 7 are similar views showing another modification in the arrange-
ment of the steam passages.
Referring to Figures 1, 2 and 3 A, B, C, and A², B³, C³, are respectively sets of
three cylinders arranged tandom fashion the two sets being arranged side by side
with a valve chest between containing a compound valve and provided with ports
or passages for distributing the steam to the whole of the cylinders. The
cylinders A, B, C, contain pistons D, E and the cylinders A', B³, C' contain
similar pistons D³É³.
The ports or passages in the valve chest for the motive fluid are numbered 1 to 12
inclusive commencing at the upper end and the pallets or valvo faces on the valve
stem are numbered 13 to 19 inclusive commencing from the upper end and actuated
by an eccentric 20 on the crank shaft 21. In the drawing the pistons D and E are
shewn in their lowest positions and the pistons D' E' in their highest positions to
receive the pressure of the steam the compound valve being shewn in the position
to commence opening the ports to admit steam into the cylinders A' B' to act on
the pistons D' E.
Live steam from the boiler enters by the pipe 22 and port 2 an annular space 23
between the pallets 13 and 14 on the compound valve and passes thence by the
port 3 into the upper end of the high pressuro cylinder, A' and at the same time
the steam from the high pressure cylinder A. is exhausting through the port 1 into
the valve chest, the said steam passing thence through a passage 24 in the upper
end of the compound valve and through the port 4 in the valve chest into a
passage 25 on the oxterior of the chest which passage communicates with tho
port 7 through which the steam passes into the interior of the valve chest between
the palleta 15 and 16 and out therefrom through the port 6 into the annular
intormediate cylinder B³.
During the time the steam is passing from the cylinder A to the cylinder B' the
annular intermediate cylinder B is exhausting through the port 8 into the valve
chest between the pallets 16 and 17 and passes thence by the port 9 into the low
pressure cylinder C, and the low pressure cylinder C is also exhausting through
the port 11 into the valve chest between the pallets 17 and 18 and thence by the
port 10 into the condenser or into the atmosphere.
At the return stroke of the pistons the compound valve will have been moved
so that the annular space 23 between the pallets 13 and 14 establishes a com-
munication between the ports 2 and 1 thereby admitting live steam from the
boiler to the high pressure cylinder A and at the same time steam from the
high pressure cylinder A' is exhausting through the port 3 into the valve chost
between the pallots 14 and 15 and thonco by the port 4 passage 25 and port 7
into the valve chest between the pallets 16 and 17 and therefrom through the
port 8 into the aunular intermediato cylinder B.
The intermediate cylinder B is at the same time exhausting through the
port 6 into the valve chest between the pallets 15 and 16 and thence through
the port 5 and a pipe or passage 26 and port 12 into the valve chest between
the pallets 18 and 19 and out therefrom through the port 11 to the low pressure
cylinder C. The low pressure cylinder C is also at the same time exhausting
through the port 9 into the valve chest between the pallets 17 and 18 and thence
by the port 10 to a condenser or into the atmosphere. The steam admitted to

page_text: the low pressure cylinders acts on the whole under sides of the pistons D E
and D E to assist them in their upward or return strokes.
In the arrangement illustrated in Figures 4 and 5 the number of pallets on
the compound valve is roduced and instead of forming a passage for the steam
in the upper end of the valve as in the arrangement last described the said
compound valve is mado solid throughout.
In this modification similar numerals are employed to indicate the parts which
correspond to those in Figures 1, 2 and 3.
The compound valve is shewn in the position in which the pallet 14 is junt
uncovering the port 3 leading to the high pressure cylinder A, so that live steam
from the boiler entering the valve chest by the pipe 22 and port 2 between the
pallets 18 and 14 passes thence by the port 3 into the high pressure cylinder A'
above the piston D' thereby forcing the said piston down in its cylinder whilst at
the same time the steam from the high pressure cylinder A is exhausting through
the port 1 into the valve chost and thence by a port 27 into a port or passage 28
outside the valve chest to the interior of the said valve chest by the port 6 between
the pallets 15 and 16 and thence into the intermediate cylinder B' in which it (the
steam) acts on the piston E (which is formed in one with the piston D') to force
the piston downward in the cylinder B. At the same time the steam in the
cylinder C³ is exhausting through the port 11 into the valve chest between the
pallets 17, 18 and thence through the port 10 into a condenser or into
the atmosphere whilst the steam from the intermediate cylinder B is also passing
through the port 8 into the valve chest between the pallets 16 and 17 and thence
by the port 9 into the cylinder C and acting by expansion on the pistons D
and E assists in raising the said pistons in their cylinders. When the pistons
have completed their stroke the compound valve is moved into the position to
admit of the live stoam entering the valve chest between the palleta 13 and 14
and through the port 1 into the high pressure cylinder A the steam from the high
pressure cylinder A' at the same time exhausting through the port or passage 3
into the valve chest and thence by the port 4 into the cylinder B thereby forcing
the piston E down and expelling the steam from the cylinder C through the port 9
Buto the valve chest whence it passes through the port 10 into a condenser or into the
atmosphere and the steam from the intermediate cylinder B is exhausting into the
valve chest by the port 6 and passes thence by the passage 29 and port 11 into
the cylinder acting expansively therein on the underside of the pistons D' and E'
to assist them in their upward or return stroke. The arrangement illustrated by
Figures 6 and 7 is like that illustrated by Figures 1, 2 and 3 except that instead of
providing a passage for the steam through the upper end of the compound valve
the said passage is provided on the exterior of the valve chest similar to that shewn
in Figures 4 and 5.
The parts corresponding to those in the previously described arrangements are
indicated by similar numerals so that the course of the steam to the several
cylinders will be clearly understood without further description.
Having now particularly described and ascertained the nature of this invon-
tion and in what manner the same is to be performed I declare that what I
claim is.-
1. A single acting multiple expansion motive power engine consisting of the
combination with two sets of cylinders, each set comprising a high pressure cylinder
and intermediate pressure cylinder and a low pressure oylinder; a compound valve
consisting of a number of pallets or valve faces carried by a solid rod or shank and
ports or passages arranged as hereinbefore described and opened and closed by the
valve faces or pallets for distributing the steam to the several cylinders substantially
as hereinbefore described.
2. The combination and arrangement of parts constituting the single acting
multiple expansion motive power engine hereinbefore described and illustrated by
Figures 1, 2 and 3 of the accompanying.drawings.

page_text: 3. The combination and arrangement of parts constituting the single acting
multiple expansion motive power engine hereinbefore described and illustrated by
Figures 4 and 5 of the accompanying drawings.
4. The combination and arrangement of parts constituting the single acting
5 multiple expansion motive power engine hereinbefore described and illustrated by
Figures 6 and 7 of the accompanying drawings.
Dated this 30th day of October 1893.