ROVE- MENTS IN VALVES AND VALVE-GEAR FOR MOTIVE-POWER ENGINES
Year: 1884

page_text: "
I JAMES HARTLEY PROCTOR of 10 Rushton Street, Bolton in the County of
Lancaster, Architect, do hereby declare the nature of my Invention for IMPROVE-
MENTS IN VALVES AND VALVE-GEAR FOR MOTIVE-POWER ENGINES," to be as
follows:-
"
This invention relates to improvements in valves and valve-gear employed in
motive-power engines, and consists in constructing and adapting a circular or
Corliss" valve to perform the function of an inlet and outlet valve to the cylinder,
or what are known in a steam engine as steam and exhaust valves.
In "Corliss." steam engines at present in use, seperate steam and exhaust valves
are employed at each end of the cylinder, or four valves to each cylinder, whereas
my improved arrangement dispenses with two valves, the admission and emission
being performed by one valve at each end, which is accomplished by making the
valve circular or similar to a "Corliss" fixed on a spindle, the latter working in
suitable stuffing boxes and glands as usual. The valve is divided into two divisions,
one side and its two ports or passages being for the admission of steam, the other
side and its ports being arranged for the exhaust, which takes place according to
the movement or position of the valve. Each valve is inclosed in a box placed at
the end of the cylinder, having a midfeather to seperate the admission and emission
passages to which it is connected.
ני
In applying my improved valve to the ordinary three ported cylinders, the
"Corliss
or circular valve is arranged with either one or more admission ports or
passages, the outlet or admission side to the cylinder being arranged according to
the ports or passages in the cylinder. In this case the exhaust port in the valve is
arranged similar to that in an ordinary slide valve, by which, with the action
of the valve the exhaust from each end is directed down the centre or exhaust
passage.
An important feature in this invention is that it can be applied to existing
engines by simply removing the valve box, and fixing, by bolting or otherwise, a
"Corliss or circular valve box having ports or passages corresponding with those
in the cylinder.
My improved valve gear is applicable for operating the aforesaid improved
"Corliss" or circular valve as well as the ordinary slide valves used in steam or

page_text: other engines, which are usually operated by means of a crank or an eccentric,
which, in the case of the latter causes the valve to open and close slowly, resulting
in wire-drawing with its attendant loss of pressure and power, through the valve
not opening to its full extent until a considerable portion of the stroke is attained.
To the valve spindle, rod, or lever connected to the valve spindle is attached a
metallic frame extending over the crank shaft or other shaft driving the valves,
provided with suitable stops or projections placed according to the point of
revolution at which the opening and closing of the valve is required. This metallic
frame is mounted in slides or fixings, and operated by a projecting arm or arms
fixed on the crank or other shaft striking the said stops or projections. The
projecting arm or arms are made in halves and bolted together or otherwise, being
secured by convenient means.
This valve gear allows the valve to be opened immediately to its full extent or
otherwise as desired, in which position it stops or pauses until the projecting arm
or arms strike the stop or projection on the opposite side of the metallic frame,
thus effecting the cut-off quite as quickly as it was opened, with the result of
minimising the loss from wire-drawing the steam, also the friction, which is
considerably less than that of the eccentrics at present employed.
Dated this 18th day of October 1884.
EDMUND CHADWICK,
Agent for the Applicant.

page_text: I JAMES HARTLEY PROCTOR of 10 Rushton Street, Bolton' in the County of
Lancaster, Architect, do hereby declare the nature of .,my said Invention for
"IMPROVEMENTS IN VALVES AND VALVE-GEAR FOR MOTIVE-POWER ENGINES," and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to improvements in valves and valve-gear employed in
motive power engines, and consists in constructing and adapting circular or
"Corliss" valves to perform the function of an inlet and outlet valve. to the
cylinder, or what are known in steam engines as steam and exhaust valves ;. also
in valve gear for operating the said valves as well as the ordinary slide valves used
in steam or other engines. For this purpose I arrange the mechanical movements
and arrangements in the manner I will describe referring to the accompanying
drawings; Fig. 1, is a sectional elevation of my improved circular or "Corliss"
admission and emission valve applied to a three ported cylinder with one admission
port into the valve casing; Fig. 2 is a similar construction with two admission
ports in the casing; Fig. 3 is a sectional elevation of my improved valve and valve
box applied to the valve facing of an ordinary three ported cylinder; Figs. 4, 5,
and 6 are modifications of my improved valve applied to each end of a cylinder
similar to those known as "Corliss" cylinders: A is the steam or admission pipe
bolted or cast to the valve box B; this. box is bored out to receive the circular or
"Corliss" valve C, in which is disposed the ports or passages D for admitting steam
into the cylinder H through the ports E, the emission or exhaust passing through
the ports or passages F according to the oscillating or reciprocating movement of
the valve. The valve is pivotted on the centre spindle G provided with the circular
ends passing as usual through suitable stuffing boxes and glands, on which are fixed
the usual levers or other appliances connecting it to the valve gear operating the
same.
Figs. 7 and 8 are modifications of my improved valve gear for operating valves
similar to those described above, or the ordinary slide valve. The metallic frame I
is attached to the spindle or rod J and connected to the valve spindle, rod, or lever
in any convenient way by suitable appliances. The frame I is placed over the
crank shaft K or other shafts employed for operating the valves, and provided with
the stops L placed according to the point of revolution at which the opening and
closing of the valve is required. The frame I is mounted in the slides or fixings M
fixed in any convenient position on the foundation of the engine or otherwise
according to the construction of the same. On the shaft K. is disposed the projecting
arm N which in revolving with the shaft strikes the stops L by which the frame I
slides in the fixings M and thus operates the valve through the various connections.
To facilitate adjustment or otherwise the arm N is secured to the shaft K by the
clips P made in halves and bolted together by the bolts R, and firmly secured to
the shaft by the key S.

page_text: In another arrangement I provide the projection O as in Fig. 8, which is for the
purpose of effecting an early cut-off, at the same time leaving the exhaust port
open until the appointed time for closing the same. This is effected by making the
projection O slightly shorter than the projection N, consequently a reduced stroke
is produced just sufficient to close the admission port, leaving the exhaust or
emission port partly open and at which point the latter remains until the pro-
jection N advances and completes the stroke when the exhaust or emission is
entirely closed and the opposite admission and emission ports opened.
If desired the frame I cau be coupled direct as in Fig. 7, or by the pivotted link
or rod T as in Fig. 8.
This valve-gear allows the valve to be opened immediately to its full extent or
otherwise as desired, in which position it stops or pauses until the projecting arm
or arms strike the stop or projection on the opposite side of the metallic frame, thus
effecting the cut-off quite as quickly as it was opened, with the result of minimising
the loss from "wire-drawing" the steam, also the friction which is considerably less
than that of the eccentrics so often employed.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1. The use and construction of the modifications of circular or "Corliss" valves
and valve boxes with the various arrangements of ports, applied and operating
substantially as and for the purposes herein set forth and described.
2. The respective combinations and arrangements of apparatus forming my
improved valve-gear, constructed and operating substantially as described and as
shewn on the drawings in Figs. 7 and 8.