Improvements in Valves for Operating Single-acting Fluid Motive- power Engines.
Year: 1889

page_text: Date of Application, 21st Dec., 1889
Complete Specification Left, 27th May, 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Valves for Operating Single-acting Fluid Motive-
power Engines.
1 GEORGE WILLIAM NEWALL 15 Litchfield Terrace, Red Post Lane Upton Park,
Essex, Engineer do hereby declare the nature of this invention to be as follows :-
These improvements relate to valves for operating and distributing the steam or
other fluid to and from the cylinders and pistons of single-acting engines-particularly
applicable to those machines and other motive power engines for which Letters
Patent have been granted me number 2215 dated 14th Feby. 1888 and number 6816
dated 8th May 1888-the object of which is to dispense with the usual complicated
reversing gear and its attendant links and motion rods. These improvements mainly
consist of forming in any suitable position on the cylinder or covers of such engines
as already described in the aforementioned inventions; a hollow truncated box
containing a disc valve or other device formed with ports and passages, engaging
with similar ports and passages when brought into position by means of a lever or
other device from without the truncated box cover. This lever may bear the form of
an ordinary locomotive reversing valve lever and fitted with the usual quadrant catch
plate and trigger. The disc valve already referred to contains the necessary ports
and passages for conveying and distributing the steam to and from the cylinders
and pistons for reversing the functions of the ports and passages contained in the
sides of the cylinders and pistons and bereinafter termed the reversing valve.
This reversing valve may be arranged to work on flat circular faces, or, the faces
may be curved or cone shaped to suit the various modifications; as each reversing
valve contains more or less ports and passages as may be required for reversing either
bigh pressure compound or quadruple engines and other machines operated by single-
acting pistons.
These reversing valves are able to control any number of cylinders and further,.
may be designed with compounded ports and passages for operating engines carrying
the expansions of steam through a number of cylinders and pistons, the steam inlet
being common to both actions, while the outlet or exhaust may be also common to
both actions or reversibility of such engines as enumerated above. The object in all
cases being to reverse the functions of the supply and discharge ports and passages of
single-acting engines and other motive power machines.
Tinted this 91st day of December 1889.
COMPLETE SPECIFICATION.
Improvements in Valves for Operating Single-acting Fluid Motive-
power Engines.
I GEORGE WILLIAM NEWALL 15 Litchfield Terrace Red Post Lane Upton Park
Essex, 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 :-
This invention has for its object improvements relating to valves for conveying and
distributing the steam or other fluid pressure to and from the cylinders and pistons of
single-acting engines-particularly applicable to those machines and other motive
power engines for which Letters Patent have been granted me No. 2215. dated
14th Feby. 1888 and No. 6816 dated 8th May 1888. The primary object of which
is to dispense with the ordinary eccentric and valve gear, and also the usual complicated
reversing gear and its attendant links and motion rods.
These improvements consist of forming in any suitable position on the cylinder or
cylinder covers of such engines as already described in the aforementioned inventions;

page_text: How valve-box or casing containing a dise valve or other device formed with
suitable ports and passages, engaging at the proper moment with similar ports and
passages, and operated by means of any suitable lever from without the valve-box
casing or cover; for conveying and distributing the steam to and from the cylinders
and pistons and for reversing the functions of the ports and passages contained in
the sides or covers of the cylinders and pistons and termed the reversing valve.
These valves may be arranged to work on flat circular faces, curved or cone shaped,
to suit the various modifications and arranged to reverse either, high pressure, com-
pound, or quadruple expansions engines and other machines operated by single-acting
pistons, as constructed in accordance with my invention.
Suitable steam ports and passages may be led from either side of the truncated
box, or domes to the corresponding ports and passages of the reversing valves, when
the engine is so arranged, it is rendered reversible.
One reversing valve will control any number of cylinders with their respective
pistons constituting a tandem of the engine, the inlet of steam into the reversing
valve-box or casing being common to both actions, while the exhaust from the sides
of the cylinders (as the case may be) is also common to both actions.
So that my invention may be better and clearly understood when carried into
practice, and in what manner these improvements may be arranged I herewith append
Drawings illustrative of my invention.
Figures 1, 2 and 3 represent various views of the cylinders pistons and reversing
valves as applied to my high pressure engines. A is the cylinder containing the
elongated piston B, having the steam and exhaust recesses b and b¹ in same, and bored
at right angles to its axis and fitted by the cylindrical oscillating valve C, devised
with two or more ports and passages and secured to the connecting rod D by a screw
formed on the end of same as shown, which may be fastened by means of a split pin
or set screw. The side passages a and a¹ are the steam and exhaust ports leading
from the reversing valve-box E, containing a flat dise or other formed valve e working
on the valve face e¹. Figure 3 represents the elevation of the valve face e'. This
valve is provided with suitable ports and passages which cover alternately the steam
and exhaust ports and passages to the cylinders a and a¹, and operated by means of
the lever G through the valve-box cover e², S is the steam entrance common to the
reversing valve-box, X is the exhaust passage or outlet also common to both actions of
the reversing valve, when the reversing valve is brought centrally on the valve face
all the ports and passages are blind with each other, and when the reversing valve is
brought over to either side, one of the steam ports and one of the exhaust ports only
are brought into action, and on reversing the position of the valve, that port which
conveyed the steam to the cylinders and pistons of the engine, now becomes the
exhaust, while the exhaust in the latter case now becomes a steam port. The action
of the cylindrical oscillating valve C is similar to that already described in the
aforesaid inventions.
Figures 4, 5 and 6 represent sections through the cylinders and pistons of my com-
pounded engines and valves for reversing same. The cylinder B contains an elongated
piston having four recesses or pockets ¹³ and 6 in same as shown in Figure 5
which pockets or recesses are in connection with the ports in the reversing valve face
represented by the circles 61 62 63 64 Figures 45 and 6 which are alternately covered
and uncovered by the compound reversing valve e working within the valve-box or
casing E, by means of the lever G through the cover 2 and alternately altering the
functions of the steam and exhaust passages formed round the cylinder B for conveying
the steam to and from the pistons. S is the steam inlet to the reversing valve-box
and X the exhaust branch from same, both being common to either actions of the
reversing valve. Figure 4, represents a section through the cylinder and piston of
my compound engines, the right hand half of the section representing the form of the
ports and passages leading through the piston and valve for operating the high pressure
cylinder formed by the sleeve piece A, fitted by the stationary piston a a supplied
with spring packing-rings as shown. The left hand half of the section represents the
form of the ports and passages contained and leading through the piston and valve

page_text: for operating the low pressure piston formed by the annular space between the
sleeve piece A and the body of the cylinder B. The elongated piston b is bored
transversely to its axis and contains the cylindrical oscillating valve C Figures 4
and 5. This valve becomes the inlet and outlet valve to the pistons and cylinders and
contains four or more suitable ports and passages, divided by partitions to allow of the
distribution of the steam to and from the high and low pressure cylinders and pistons
already referred to, and connected by seperate suitable ports and passages with the
reversing valve e. Figure 6 represents the section through the valve e, and elevation
of the valve face e¹ containing the ports for alternately covering and uncovering same
by the valve or device e.
I may describe the operation of the apparatus as follows:-
The steam or other fluid enters the branch S in the reversing valve-box Figures 5
and 6 and supposing the lever G to be in the position of g' Figure 6 all the ports and
passages both in the valve and valve face will be blind to each other, but immediately
the lever is brought over to the reversing valve e opens the steam to the port 62
whence it passes into the high pressure cylinder a Figure 4, by way of the cylindrical
oscillating valve C through the ports c¹ when in suitable position with the high
pressure port 6, after the piston has completed its stroke the cylindrical oscillating
valve C closes the port c¹ in connection with the port 65 and opens the port ² in the
valve with the port 66, the steam then passes into the passage 61 and through a port be
formed in the reversing valve e and thence through the circular or other port b' into
the passage 6 Figures 4, 5 and and into the low pressure cylinder or annular
space o Figure 4 by way of the ports ³ ³ contained in the cylindrical oscillating
valve C, after the piston has completed its stroke the ports c³ ³ close and open the
ports in the opposite side of the cylindrical oscillating valve, and the steam then
passes away by the passage 63 Figures 4, 5 and 6 and through the reversing valve e
by way of the passage and into the branch X Figures 5 and 6 to the condenser or
atmosphere. When the lever G has been brought over to the opposite side of the
valve-box to 93 the functions of the latter ports, openings and passages are reversed,
and the engine is rendered reversible.
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 combination of a valve working or sliding on flat circular, curved or cone
shaped surfaces for reversing the functions of the inlets and outlets to the cylinders
and pistons of single-acting high pressure engines as herein fully described and set
forth in reference to Figures 1, 2 and 3.
2. The combination of a valve such as is covered in the preceding claim formed
with compound ports and passages for conveying and distributing the steam or other
fluid to and from the cylinders and pistons of single-acting compound engines for
reversing the functions of the inlets and outlets substantially as and for the purposes
herein set forth in reference to Figures 4, 5 and 6.
3. The combinations such as are covered in the preceding claims in connection with
a cylindrical oscillating valve formed with ports, pockets and recesses as shown for
aistributing the steam to and from the pistons and cylinders of such single-acting
engines and claiming the method of screwing the connecting rod D direct into said
valve C as shown and secured by means of a split pin, cotter or set screw substantially
as and for the purposes herein set forth, in reference to Figures 1, 2, 4 and 5.
4. The combinations and general arrangements as contained and covered in the
preceding claims substantially as herein described and shown in the accompanying
drawings and methods applied for reversing the functions of the inlets and outlets to
such cylinders and pistons of single-acting engines in connection with the various
valves whose office and uses are herein fully described.
Dated this 27th May 1890.