Improvements in the Fluid Controlling Arrangements of Multiple- cylinder Engines.
Year: 1895

page_text: Date of Application, 24th Oct., 1895
Complete Specification Left, 24th July, 1896-Accepted, 12th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Fluid Controlling Arrangements of Multiple-
cylinder Engines.
I. JAMES DIXON CHURCHILL, of 37 Alexandra Road, Finsbury Park, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows:-
For actuating the compound attachment valves of steam engines in the manner
described in the Specification of my Patent No. 6590 of 1890, there is provided,
accorded to this invention, in connection with means for example lever arms
attached to such valves, an auxiliary motor the piston of which is connected with
the said valves and is normally subjected to pressure that serves to hold the valves
in the closed attitude, and a motive fluid distributing valve that is under the
control of the main steam engine governor and is adapted when operated by such
governor or by hand, to so control the distribution of motive fluid to, or to and
from the auxiliary motor cylinder that the piston therein will be caused to move
and open the compound attachment valves, and so place the two ends of the engine
cylinder to which they are applied, in communication with each other, and upon
the said distributing valve being released by the engine governor or otherwise, it
will automatically move into its normal position in which it will permit the
auxiliary motor piston to automatically resume its original position and close the
said compound attachment valves. By this means I am enabled to dispense to a
large extent with the levers and connecting rods heretofore used between the
engine governor and compound attachment valves, which in some cases are
necessarily complicated and difficult to arrange.
In one arrangement of my apparatus, one end of the auxiliary motor cylinder
is in permanent communication with the steam receiver between two of the engine
cylinders so that the auxiliary motor piston is constantly subjected to steam of
reduced pressure and whereby it is normally held in the position corresponding to
the closed attitude of the compound attachment valves. The other end of the
said cylinder is adapted to be placed in communication with a source of high
pressure steam, such as the main steam pipe, or the high pressure valve chest of
the engine, and with a condenser by a controlling valve that is normally held by a
spring in a position to place the secondly mentioned end of the cylinder in com-
munication with the condenser. The valve spindle is arranged to be acted upon
by the engine governor when the same exceeds a predetermined speed so that the
said slide valve will be then moved into a position to admit high pressure steam
to the auxiliary motor cylinder and thereby cause the piston therein to move in a
direction to open the compound attachment valves in opposition to the reduced
steam pressure on the other side of the piston which pressure acts to again open
the said valves when the supply of the said high pressure steam is cut off when
the engine speed becomes normal. The controlling valve may be of D form
arranged to work in a cylindrical case provided with oppositely arranged screw
coveis. One of these covers is formed with a steam inlet nozzle adapted to be
connected to the high pressure steam pipe cr valve chest of the main engine.
The other cover is formed with two adjacent ports and passages one of which is
connected by a pipe to the auxiliary motor cylinder and the other is connected by
a pipe with the condenser, and both of which are simultaneously controlled by the
said slide valve.

page_text: To a modined arrangement, the compound attachment valves are normally held
in the closed position by the action of high pressure steam on the auxiliary motor
piston normally overcoming the action of lower pressure steam on the opposite
side of the piston and the controlling valve is adapted, when operated by the
governor, to exhaust such high pressure steam, whereupon the lower pressure steam
acts to move the piston and open the compound attachment valves, the controlling
valve of the auxiliary motor may be secured to the main valve of the engine so as
to take steam therefrom, and be operated from the lever used to control, through
a governor.
Dated this 24th day of Oatchan 1005
Improvements in the Fluid Controlling Arrangements of Multiple-
cylinder Engines.
I, JAMES DIXON CHURCHILL, late of 37 Alexandra Road, Finsbury Park,
in the County of Middlesex, but now of 32 Portland Road, Finsbury Park
aforesaid, 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 :-
For actuating the compound attachment valves of steam engines in the manner
described in the Specification of my Patent No. 6590 of 1890, there are provided,
according to this invention, in connection with means, for example lever arms
attached to such valves, an auxiliary motor the piston of which is connected with
the said valves and is normally subjected to pressure that serves to hold the valves
in the closed attitude, and a motive fluid distributing valve that is under the
control of the main steam engine governor and is adapted when operated by such
governor or by hand, to so control the distribution of motive fluid to, or to and
from the auxiliary motor cylinder that the piston therein will be caused to move
and open the compound attachment valves, and so place the two ends of the engine
cylinder to which they are applied, in communication with each other, and upon
the said distributing valve being released by the engine governor or otherwise, it
will automatically move into its normal position in which it will permit the
auxiliary motor piston to automatically resume its original position and close the
said compound attachment valves. By this means I am enabled to dispense to a
large extent with the levers and connecting rods heretofore used between the
engine governor and compound attachment valves, which in some cases
necessarily complicated and difficult to arrange.
are
The accompanying drawing illustrates in sectional elevation one arrangement
of my apparatus, in which the upper end of the auxiliary motor cylinder 1 is in
permanent communication through a pipe 2 with the steam receiver between two
of the engine cylinders so that the auxiliary motor piston 3, the rod 4 of which is
connected by means of links and levers 5 with compound attachment valves, is
constantly subjected to steam of reduced pressure and whereby it is normally
held in the position corresponding to the closed attitude of the compound attach-
ment valves. The other end of the said cylinder is adapted to be placed in
communication with a source of high pressure steam or with a condenser by a
controlling valve such as 6 that is normally held by a spring 7 in a position to
place the lower end of the cylinder in communication with the condenser.
The

page_text: controlling valve 6 may, as in the example illustrated be of ☐ form arranged to
work in a cylindrical case 8 provided with oppositely arranged screw covers or
ends 9, 9. The cover or end 9 is formed upon a suitable base plate or support
that can be bolted in any convenient position near the engine governor. The
other cover or end 9* is formed with two adjacent ports and passages 10, 10"
connected respectively by a pipe 11 to the auxiliary motor cylinder and by a
pipe 11 with the condenser, and both of which are simultaneously controlled by
the slide valve 6. Steam is admitted to the case 8 through a steam inlet nozzle 12
adapted to be connected to the high pressure steam pipe or valve chest of the
main engine. The valve 6 is formed with a backwardly extending part 6 that is
encircled by a strap 13 into a boss on which is screwed the valve spindle 14 which
passes to the exterior of the case 8 through a stuffing box between which and a
collar 14ª on the rod is interposed the spring 7 which is in compression and keeps
the valve 6 in its normal position, namely, that in which the passages 10 and 10%
and consequently the pipes 11 and 11 are in communication. The lower end of
the spindle bears against a lever 15 that is pivoted to the base plate at 15" and
rests upon a roller 16 carried by the governor rod 17, or it may be a rod connected
thereto. The lever is formed on its underside with a cam-like portion the
arrangement being such that upon the engine exceeding a predetermined speed
the roller 16 will be brought beneath the cam like portion of the lever 15 so as to
raise it and the valve spindle resting thereon so that the valve 6 will be then
moved into a position to admit high pressure steam to the underside of the piston
of the auxiliary motor cylinder and thereby cause it to move in a direction to open
the compound attachment valves in opposition to the reduced steam pressure on
the other side of the piston, which pressure acts to again close the said valves
on the supply of the said high pressure steam being cut off when the engine
speed becomes normal.
In a modified arrangement, the compound attachment valves are normally held
in the closed position by the action of high pressure steam on the auxiliary motor
piston normally overcoming the action of lower pressure steam on the opposite
side of the piston and the controlling valve is adapted, when operated by the
governor, to exhaust such high pressure steam, whereupon the lower pressure
steam acts to move the piston and open the compound attachment valves.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. For actuating the compound attachment valves of steam engines after the
manner described in the Specification of my Patent No. 6590 of 1890, the
arrangement of an auxiliary motor cylinder the piston of which is connected with
the said valves and normally subjected to pressure acting to hold the valves
closed, and a motive fluid distributing valve under the control of the main steam
engine governor and adapted, when operated by such governor, or by hand, to so
control the distribution of motive fluid to, or to and from, the auxiliary motor
cylinder that the piston therein will be caused to move and open the compound
attachment valve and so place the two ends of the engine cylinder to which they
are applied in communication with each other, and, upon the said distributing
valve being released, it will assume a position such as to allow the auxiliary motor
piston to assume its original position and close the said compound attachment
valve, substantially as hereinbefore described.
2. In an arrangement of the kind referred to in Claim 1, an auxiliary motor
cylinder 1 having one end in permanent communication with the steam receiver
between two of the engine cylinders, a distributing valve 6 adapted to place the
other end of the cylinder either in communication with a source of high pressure
steam or with the condenser or exhaust, means such as a spring 7 to hold the valve
in its normal position, and means whereby said valve will upon the engine speed
becoming excessive, be moved into its reverse position substantially as described.

page_text: 3. The construction and arrangement of apparatus for actuating compound
attachment valves substantially as described with reference to and shown in the
accompanying drawings.
Dated this 24th day of July 1896.
For the Applicant,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.