Improvements in Engines Operated by Steam, or other Expansible Fluid.
Year: 1896

page_text: Date of Application, 27 h Aug., 1896
Complete Specification Left, 21st May, 1897-Accepted, 3rd July, 1897
PROVISIONAL SPECIFICATION.
Improvements in Engines Operated by Steam, or other Expansible
Fluid.
We, EASTON ANDERSON & GOOLDEN, Limited, of Erith Iron Works, Erith, in the
County of Kent, and JÖRGEN BJÖRNSTAD, of the same place, Chief Draughtsman to
the said Easton Anderson and Goolden Limited, do hereby declare the nature of
this invention to be as follows:-
This Invention relates to compound engines operated by steam, or other
expansible fluid, which is distributed by a valve, or valves, common to both
cylinders, such valve, or valves, admitting the steam, or other motive fluid (which
we will refer to as steam) to, and from, both the high pressure cylinder and the low
pressure cylinder, and the said Invention has for its object to provide an arrange-
ment by which the engine can be made more compact, excessive clearance in the
high pressure cylinder is avoided, and whorein there is less liability to objectionable
leakage of steam past the valves.
According to this Invention two valves are used, which are preferably of, or
about, the same diameter, and otherwise similar, and which should both be worked
by, or from, the same excentric, or other valve-operating gear. The ports in
connection with these valves, and with the respective cylinders, are so arranged
that one of the valves only distributes the live steam to the high pressure cylinder,
whilst both valves act conjointly to distribute the steam exhausted from the high
pressure cylinder to the low pressure cylinder, and also to exhaust the steam from
the said low pressure cylinder.
Dated this 27th dan of Arceus 190
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Engines Operated by Steam or other Expansible
Fluid.
We, EASTON, ANDERSON & GOOLDEN, Limited, of Erith Iron Works, Erith, in the
County of Kent, and JORGEN BJÖRNSTAD, of the same place, Chief Draughtsman to
the said Easton, Anderson, & Goolden, Limited, 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 stateident :-
This Invention relates to compound engines operated by steam, or other
expansible fluid, which is distributed by a valve, or valves, common to both
cylinders; such valve, or valves, admitting the steam, or other motive fluid (which
we will refer to as steam) to and from, both the high pressure cylinder and the low
pressure cylinder; and the said invention has for its object to provido an arrange-
ment by which the engine can be made more compact, by which excessive clearance

page_text: in the high pressure oylinder is avoided, and by which there is less liability to
objectionable leakage of steam past the valves.
According to this invention two valves are. used, which are preferably of, or
about, the same diameter, and 'otherwise similar,' and which should both be worked
by, or from, the same eccentric, or other valve-operating gear. The parts in
connection with these valves, and with the respectivo cylinders, are so arranged
that one of the valves only distributes the steam to and from the high pressure
cylinder, whilst the steam exhausted from the high pressure cylinder to the low
pressure cylinder passes through both valves and the exhaust from the said low
pressure cylinder is controlled by both valves.
And in order that this invention may be more clearly understood we shall now
proceed to describe the same and for that purpose shall refer to the several figures
on the annexed sheet of drawings, the same letters of reference indicating
corresponding parts in all the figures.
Figure 1 represents in longitudinal vertical section high and low pressure
cylinders and their valves arranged according to this invention.
Figure 2 is a horisontal section on the line a b Figure 1, and Figure 3 is a
transverse vertical section on the line c d Figures 1 and 2.
1 is the high pressure cylinder and 2 the low pressure oylinder between which
cylinders are arranged two valves 3 and 4 by which the passage of steam to and
from the cylinders is controlled. The valves are of the piston type, the high
pressure valve 3 having four collars or valve faces 5, 6, 7 and 8 governing four
ports 5* 6 9 9 iu the valve chamber 9. The low pressure valve 4 has two collars,
or valve faces, 10, 11, governing two ports 12* 13* in the valve chamber 12. The
valves 3 and 4 are connected to, and operated by, a single eccentric, or valve gear,
not shown in the drawings. Live steam from the boiler is admitted to the chamber 9
of the high pressure valve 3 through a passage 18, and the said steam passes into
the high pressure cylinder 1 either at the upper end or at tho lower end thereof,
governed by the valve faces 6 and 5 respectively, according to the position of the
valves. In the drawings the valves aro shewn in central position and closing all
the ports in the chambers 9 and 12 the piston 1 of the high pressure cylinder 1
having just completed its down stroke and the piston 2* of the low pressure cylinder 2
having completed its up stroke. On the valves moving downwards from the
position shewn, the ports 5* 6*9* 9** in the chamber 9 will be opened and allow the
five steam to enter, by the port 5*, the cylinder 1 beneath the piston 1* whilst the
steam in the said cylinder 1 above the piston 1 will pass, by the ports 6* 7*
and 10%, into the low pressure cylinder 2 above the pistou 2x. The high pressure
piston 1 will now make its up stroko under the action of the live steam whilst, by the
expansion of the steam from the upper end of the cylindor 1 acting on the piston 2*
of the low pressure cylinder, the said piston 2* will be caused to make its down
stroke whilst the steam in the cylinder 2 below the piston 2* will pass through the
port 11 12 in the low pressure valve chamber 12 also through the ports 8x 9xx in
the high pressuro valve chamber 9 into a chamber 14 communicating with the
exhaust passage 15. On the reverse movement of the valves the port 6 is opened
to the live steam entering the valve chamber 9 by the passage 13, the said steam
passing through the said port 6* into the high pressure cylinder I, above the piston 1*,
the steam contained in the said cylinder beneath the piston 1 passing through
the ports 5 8 and 11, in the chamber 9 into the low pressure cylinder 2, beneath
the piston 2, whilst the steam contained in the cylinder 2 above the piston 2*
passes therefrom through the ports 10* 18* in the valve chamber 12 and through
the ports 7x 9x in tho valve chamber 9 into the chamber 16 communicating with the
exhaust passage 17.
By the arrangement hereinbefore described a free passage for the exhaust steam
is provided and compactness is obtained.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be porformed, we declare that what we
claim is

page_text: In engines operated by steam, or other expansible fluid, the employment of two
similar valves similarly operated, and ports so arranged that only one of the valves
controls the passage of motive fluid to and from the high pressure cylinder, whilst
motive fluid passes from the high pressure cylinder to the low pressure cylinder
through both valves and the exhaust of motive fluid from the low pressure cylinder
ia controlled by both valves substantially as herein before described.
Dated this 2180 day or may
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C.,
Agenta.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.O.,
Agents.