Improvements in Engine Distribution Valves.
Year: 1895

page_text: Date of Application, 20th Mar., 1395
Complete Specification Left, 17th Dec., 1895--Accepted, 1st Feb., 1896
PROVISIONAL SPECIFICATION
Improvements in Engine Distribution Valves.
I, HARRY LEWIS KLINE, of 260, Lafayette Street, Dayton, in the County
of Montgomery, Ohio, United States of America, Engineer, do hereby declare the
nature of this invention to be as follows:-
The invention relates to balance valves for controlling the distribution of steam,
and consists principally of a rocking valve provided with a cavity adapted to
connect the interior of the steam chest with the cylinder port and the latter with
an exhaust chamber. The inlet ports of the cylinder connect with ports leading
to segmental valve seats formed in the valve seat body in the steam chest adapted
to receive cylindrical valves whose ends are journalled in the sides of the valve
body and in the cap thereof. The exhaust port opens into a chamber formed
within the valve seat body, and between the two valves, the top of the chamber
being closed by a transversely-extending bridge forming part of the cap and
having its side edges bearing on the peripheral surfaces of the cylindrical valves.
One side of the valve body rests against one side of the steam chest and the other
side abuts on a longitudinally extending rib forming part of the steam chest. The
valves have peripheral cavities which, when the valves are rocked in their bearings,
alternately connect the interior of the steam chest with the corresponding cylinder
port and the said ports with the exhaust steam chamber.
Rocking motion is imparted to the cylindrical valves by means of lugs projecting
from the valves, the lug of the one valve carrying a transverse pin on which is
pivoted a link coupled to the rounded portion of a pin carried in the lug of the
other valve, said pin having squared portions fitting in vertical recesses in the head
of the valve stem extending through stuffing boxes in the inner end of the steam
chest to connect with the usual valve gear of the engine for imparting a forward
and backward sliding motion to the said stem to rock the valves in their seats.
The valve stem head abuts against the under side of the steam chest cover and
from the said head extend rearwardly, arms travelling on top of a transverse rib
forming part of the bridge.
Assuming both valves to be closed, when a sliding motion is given to the valve
stem in the one direction, both valves are so rocked that the peripheral cavity of
the one connects the ports at one end of the cylinder with the exhaust chamber
and the cavity in the other valve connects the ports at the other end with the
steam chest, so that live steam can pass through said cavity and ports to the inner
end of the cylinder, whilst the steam in the other end of the cylinder can pass out
through the ports and cavity to the exhaust chamber and port. When the valve
gear moves the valve stem in the inverse direction, the valves are rocked or turned
in the inverse direction and the functions of the valve cavities, as regards the exhaust
and admission of steam, are reversed. The major portion of the peripheral surface
of the valves is at all times exposed to the live steam in the steam chest so that
the valves are completely counterbalanced and back pressure is avoided. In case
of the breaking of the outer cylinder head, the one valve is locked in place in a
closed position so that this end of the cylinder does not take steam. In order to
hold the valve in a closed position, I remove the connecting link and connect the
pin with a link engaging a stud screwing into the outer end of the steam chest.
The cavity now extends in the valve seat over the port but does not open into the

page_text: interior of the steam chest, nor into the exhaust chamber. The other valve only
is now actuated by the valve gear so that the inner end of the cylinder is the only
one supplied with live steam.
Dated this 20th day of March 1895.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.
Improvements in Engine Distribution Valves.
I HARRY LEWIS KLINE, of 260 Lafayette Street, Dayton in the County of
Montgomery and State of Ohio, United States of America, Locomotive 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 relates to balance valves for controlling the distribution of steam
and it has for its object to provide a quick acting valve which requires but little
power to operate it and without strain on the valve gear.
The invention consists principally of a rocking valve provided with a cavity,
adapted to connect the interior of the steam chest with the cylinder port and the
latter with an exhaust chamber.
The invention also consists in certain parts and details, and combinations of the
same; as will be hereinafter more fully described and pointed out in the claims.
Reference is to be had to the accompanying drawings forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in
all the views.
Figure 1 is a sectional side elevation of the improvement on the line 1-1 of
Figure 2;
Figure 2 is a transverse section of the same, on the line 2-2 of Figure 1;
Figure 3 is a sectional plan view of the same on the line 3-3 of Figure 1.
Figure 4 is a sectional side elevation of a device for locking one of the valves
in place in case of accident; and
Figure 5 is a plan view of a link for the device shown in Figure 4.
The cylinder A is provided with the usual inlet ports a and b and the exhaust
port c, of which the ports a and b connect with ports a', 6', respectively,
leading to valve seats B1, B2 respectively, formed in the valve body B set in the
steam chest C, as plainly shown in Figures 1 and 4, the said valve seats B1 and B2
being segmental and adapted to receive the cylindrical valves D and D' respectively,
having their ends journaled in the sides of the valve body B, and in the cap B
thereof. The exhaust port c opens into a chamber c¹ formed within the valve
body B, and between the two valves D, D', the top of the chamber being closed
by a transversely-extending bridge B³, forming part of the cap B, and having its
side edges bearing on the peripheral surfaces of the cylindrical valves D and D'.
The cap B is secured to the sides of the valve body B by screws E, which
extend upward and pass through the cover of the steam chest C, (as plainly shown
in Figure 1,) to perinit the operator to readily remove the cap B on removing
the steam chest cover.
One side of the valve body B rests against one side C¹ of the steam chest C,
and the other side of the said valve body abuts on a longitudinally extending rib C',
forming part of the steam chest C, as will be readily understood by reference to
Figures 2 and 3.
The valves D and D₁ are formed with cavities or
recesses D2 and D³
respectively in their peripheries, which when the valves are rocked in their
bearings, alternately connect the interior of the steam chest C with the

page_text: corresponding cylinder port a or 6, and the said ports with the exhaust steam.
chamber c', see dotted lines Figure 1.
In order to impart a rocking motion to the cylindrical valves D and D¹, to the
top of the said valves D and D¹ are secured upwardly extending lugs D* and D*-
respectively, of which the lugs D carry a transversely-extending pin F, on which.
is pivoted a link G, engaging at its forward end the rounded portion H' of a pin H,.
carried in the lugs D of the valve D', said pin H being formed with squared
portions H fitting in vertically-extending recesses I' arranged in the head I of the
valve stem I, extending through stuffing boxes in the inner end of the steam chest,
to connect with the usual valve gear of the engine, for imparting a forward and
backward sliding motion to the said stem to rock the valves D and D¹ in their
seats. The head 12 abuts against the under side of the steam chest cover C³, and
from the said head extend rearwardly, arms 13, travelling on top of a transversely-.
extending rib B5 forming part of the bridge B*.
When the several parts are in the position illustrated in Figure 1, both valves D
and D' being closed, on a sliding motion being given to the valve stem I, in the
direction of the arrow d, both valves D and D are rocked in the direction of the
arrows e, whereby the cavity D 2 connects the ports a, a, with the exhaust.
chamber c¹, and the cavity D³ in the valve D' connects the ports 616 with the
interior of the steam chest C, so that live steam can pass through the said cavity D³-
and ports bb to the inner end of the cylinder, to act on the piston therein, so as.
to move the latter on its outward stroke, whilst the steam in the front of the cylinder
can pass through the ports aa' and cavity D' to the exhaust chamber c¹ and exhaust
port c, to finally pass to the outer air in the usual manner. When the piston nears.
the end of its outer stroke, the valve gear will move the valve stem I in the inverse-
direction of the arrow d, whereby the valves D and D' are rocked or turned in the
inverse direction of the arrow e, and the cavity D² then connects the interior of
the steam chest C with the ports a¹ a, while the other cavity D³ connects the
ports 6'6 with the exhaust chamber c'. When this takes place, live steam passes
through the valve D and ports a' a to the outer end of the cylinder, to force the-
piston on its inward stroke. Exhaust in front of the piston now passes through
the ports bb', and cavity D³ to the exhaust chamber c¹ and port c, to the-
outer air.
By reference to Figures 1 and 3, it will be seen that the major portion of the
peripheral surface of the valves D and D' is at all times exposed to the live steam
in the steam chest C, so that the valves are completely counter-balanced and back
pressure is avoided.
In case of the breaking of the outer cylinder head, the
valve D is locked in place in a closed position, as illustrated in Figure 4, so that
this end of the cylinder does not take steam. In order to thus hold the valve D in a
closed position I remove the connecting link G, and connect the pin F with a
link J engaging a stud K screwing into the outer end C' of the steam chest C..
The cavity D now extends in the valve seat B¹ over the port a', but does not open
into the interior of the steam chest nor into the exhaust chamber c'. The other
valve D' only is now actuated by the valve gear, so that the inner end of the cylinder
is the only one supplied with live steam.
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. A valve mechanism comprising two segmental valve seats set within the steam.
chest, provided with ports leading to the cylinder ports, cylindrical valves mounted
to turn in the seats and each having a cavity adapted to connect the interior of the
steam chest with the corresponding cylinder port and the latter with the exhaust
chamber, lugs projecting from the said valves, a link connecting the two lugs with
each other, and a valve stem connecting with one of the lugs, the said valve stem
being provided with a head having vertically disposed slots engaging square:
portions of the pin in one of the lugs, substantially as shown and described.

page_text: 2. A valve mechanism comprising two segmental valve seats set within the steam
chest, provided with ports leading to the cylinder ports, cylindrical valves mounted
to turn in the seats and each having a cavity adapted to connect the interior of the
steam chest with the corresponding cylinder port and the latter with the exhaust
chamber, lugs projecting from the said valves, a link connecting the two lugs with
each other, and a valve stem connecting with one of the lugs, the said valve stem
being provided with a head adapted to engage with its top surface the under face of
the steam chest cover, the said head being also provided with rearward extensions
travelling on a rib forming part of the bridge for the said valve body, substantially
as shown and described.
3. A valve mechanism comprising a segmental valve seat set within the steam
chest, a cylindrical valve mounted thereon, a lug projecting from the valve, a link
connected with the lug and a stud attached to the steam chest and with which
said link is adapted to be connected to lock the valve, substantially as described.
Dated this 17th day of December 1805
A. M. & WM. CLARK,
53 Chancery Lane, London, Chartered Patent Agents.
A. M. & WM. CLARK,
53 Chancery Lane, London, Chartered Patent Agents.