Improvements in Slide Valves suitable for Fluid Pressure Engines and other Purposes.
Year: 1898

page_text: Date of Application, 18th Apr., 1898
Complete Specification Left, 28th Jan., 1899-Accepted, 4th Mar., 1899
ale u Application, foth Apr., 1890
Complete Specification Left, 28th Jan., 1899-Accepted, 4th Mar., 1899
PROVISIONAL SPECIFICATION.
Improvements in Slide Valves suitable for Fluid Pressure Engines
and other Purposes.
We, WILLIAM HAMILTON MARTIN, Engineer, of 110, Dokkade, Flushing,
Holland, and JAMES ANDREWS, Engineer, of 119, Dokkade, Flushing, Holland,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in slide valves suitable for fluid pressure
engines and other purposes and has for object to produce a balanced slide valve of
simple construction and comparatively short travel and which when moved into
the open position will provide double or multiple passages or ways for the flow of
fluid.
At
In one construction of slide valve according to this invention adapted to con-
trol the admission and exhaust of steam to and from the steam engine cylinder
having a valve face provided with a central exhaust port and inlet ports at each
side thereof, the valve proper consists of a flat plate formed with a port or passage
near each end. and another arranged centrally these ports or passages extending
through the valve from one face thereof to the other. The valve is also formed with
a central tubular sleeve through which the valve operating spindle passes.
the back of the slide valve is a frame or plate formed with recesses at the side or
face adjacent to the valve and corresponding in position to the inlet and exhaust
ports of the cylinder. This frame is preferably made with supports at each side
extending to and resting upon the valve face of the cylinder in such a manner that
the slide valve bears simultaneously on the face of the cylinder and also against
the corresponding face of the frame. The frame or plate is normally pressed
towards and against the valve by a suitable spring which may be
a flat coach spring, or a spiral spring and have means to adjust it
from the exterior of the valve chest. Projections or guides are formed on the
frame or plate to enable it to be suitably held and prevented from moving in a
lateral direction with the movement of the valve while allowing it a small amount.
of movement in a direction at right angles to the valve face.
In operation steam surrounds the valve and frame in the steam chest so that upon
moving the valve in one direction into its open position steam will pass one end
of the valve directly into the cylinder through the corresponding inlet port and
also into the corresponding recess in the frame and thence through the port or
passage in the corresponding end of the valve to the said inlet port. At the other
end of the valve steam will simultaneously exhaust directly from the end inlet
port corresponding to that end of the cylinder through the central opening in the
valve into the exhaust port and also from the said inlet port through the end port
or passage in the valve along the corresponding recess in the frame and thence
through the central opening in the valve to the exhaust passage.
Such valves may be used for steam, water, air or other fluids or gases and may
also be so constructed for use with a steam cylinder that the steam exhausts

page_text: through a suitable opening in the back of the frame say at a central position
instead of or in addition to the exhaust port in the cylinder, in which case the frame
is provided with an extension on its back passing through a stuffing box on the
valve chest cover for conveying the exhaust steam outside of the valve chest; or
other suitable means may be used to attain the same end.
Slide valves in accordance with this invention may also be adapted for the
opening and closing of communication between two reservoirs, receivers or spaces
such as a steam generator and the steam receiver of an engine.
In one construction for this purpose a valve chest is provided with two branches
one for connection to the fluid supply pipe, for example the steam pipe from a
steam generator, and the other for connection to the fluid receiver for example
the steam chest of an engine or a pipe in connection therewith. The flat plate
valve in this case is formed with a large central opening and is provided with a
tubular sleeve to receive the valve operating spindle. The frame or plate behind
the valve is formed with a recess on its side adjacent to the valve and corresponding
in size and position to the opening in the valve chest face, and with sides resting on the
valve face of the chest in such a manner that the valve can slide or move between
the valve face of the chest and the face of the frame adjacent to it. Suitable means
are provided for keeping the frame in position as already described. When the
valve is opened by moving it laterally to one side, fluid can pass from the valve
chest at one side directly into the branch leading to the fluid receiver and also
through the recess in the frame and the central opening in the valve to the said
branch, and at the other side through the said central opening in the valve from
each side or face thereof.
.
08
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn. Fields, London, W.C.,
Chartered Patent Agent.
Improvements in Slide Valves suitable for Fluid Pressure Engines
and other Purposes.
We, WILLIAM HAMILTON MARTIN, Engineer, of 110, Dokkade, Flushing,
Holland, and JAMES ANDREWSs, Engineer, of 119, Dokkade, Flushing, Holland,
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 improvements in slide valves suitable for fluid pressure
engines and other purposes and has for object to produce a balanced slide valve
of simple construction and comparatively short travel and which when moved into
the open position will provide double or multiple passages or ways for the flow
of fluid.
In the accompanying drawings, Figs. 1 to 4 inclusive show one construction of
slide valve according to this invention adapted to control the admission and exhaust
of steam to and from a steam engine cylinder having a valve face provided with a
central exhaust port and inlet ports at each side thereof. Fig. 1 is a longitudinal
section; Fig. 2 a half plan of the valve and half plan of the balance frame; Fig. 3
a half cross section and half end elevation; and Fig. 4 a similar view to Fig. 1
on a smaller scale with the valve in a different position.

page_text: The valve proper consists of a flat plate 1 formed with two ports or
passages 2, 2ª near its two ends and with a centrally arranged port or passage 3,
these ports or passages extending through the valve from one face thereof to the
other. The valve is also formed with a central tubular sleeve 4 through which the
valve operating spindle 5 passes. At the back of the slide valve is a frame or
plate 6 formed with recesses 6", C at the side or face adjacent to the valve and
corresponding in position to the ports 7", 7" of the cylinder. This frame 6 is pre-
ferably made with supports 6b at each side extending to and resting upon the valve
face of the cylinder in such a manner that the slide valve bears simultaneously
on the face 7 of the cylinder and also against the corresponding face 6 of the
frame 6. The frame or plate 6 is normally pressed towards and against the valve
by a suitable spring which may be a flat coach spring 8 as shown, or a spiral spring,
and be provided with suitable means, such as a set screw, whereby it can be
adjusted from the exterior of the valve chest. Projections or guides (d are formed
on the frame or plate 6 to enable it to be suitably held by a fixed part A of the
steam chest and so prevented from moving in a lateral direction with the move-
ment of the valve while allowing it, a small amount of movement in a direction at
right angles to the valve face.
In operation steam surrounds the valve and frame in the steam chest so that
upon moving the valve in one direction into its open position, say to the right
hand as shown in Fig. 4 steam will flow past as indicated by the arrows at the
left hand side of Fig. 4, one end of the valve directly into the cylinder through
the corresponding inlet port 7 and also into the corresponding recess 6 in the
frame 6 and thence through the port or passage 2 in the corresponding end of the
valve to the said inlet port 7. At the other end of the valve, steam will simul-
taneously exhaust directly from the end inlet port 7° partly through the central
opening 3 in the valve into the central exhaust port 7 and partly through the
end port or passage 2ª in the valve, through the corresponding recess 6 in the
frame 6 and thence through the central opening 3 in the valve to the exhaust
passage as indicated by the arrows at the right hand side of Fig. 4.
As will be seen by the construction described large openings are provided for the
supply and exhaust of steam by a comparatively small movement of the valve.
Such valves may be used for steam, water, air or other fluids or gases, and may
also be so constructed, for use with a steam cylinder, that the steam exhausts
through a suitable opening in the back of the frame 6, say at a central position
therein, instead of or in addition to the exhaust port 7° in the cylinder, in which
case the frame is provided with an extension on its back passing through a stuff-
ing box on the valve chest cover for conveying the exhaust steam outside of the
valve chest; or other suitable means may be used to attain the same end.
Slide valves in accordance with this invention may also be adapted for the open-
ing and closing of communication between two reservoirs, receivers or spaces such
as a steam generator and the steam receiver of an engine.
One construction of valve suitable for this purpose is shown in Figs. 5 to 8
inclusive of the accompanying drawings: Fig. 5 being a cross section; Fig. 6 a
half plan and half horizontal section with the cover or balance frame removed:
Fig. 7a sectional end elevation, the valve being closed; and Fig. 8 a partial
section showing the valve in the open position. The valve chest 9 is provided with
two branches 10, 11, the former, 10, for connection to the fluid supply pipe, for
example the steam pine from a steam generator, and the other, 11, for connection
to the fluid receiver, for example the steam chest of an engine or a pipe in con-
nection therewith. The flat plate valve 12 in this case is formed with a large
central opening 13 and is provided with a tubular sleeve 14 to receive the valve
operating spindle 15. The frame or plate 16 behind the valve is formed with a
recess 16 on
its side adjacent to the valve and corresponding in size
and position to the opening 11 in the valve chest face 11b and with
sides 16b resting on the valve face 11b of the chest in such a manner that the

page_text: valye can slide or move between the valve face of the chest and the face of the
frame 16. Suitable stops 16° are provided on the frame 16 for keeping it in
position, and a spring 17 serves to press the said frame in place upon the valve
chest face 11. When the valve is opened by moving it laterally to one side, as
shown in Fig. 8, fluid can pass from the valve chest at one side directly into the
branch 11 leading to the fluid receiver and also through the recess 16 in the
frame 16 and the central opening 13 in the valve to the said branch, and at the
other side through the said central opening in the valve from each side or face
thereof.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. A slide valve suitable for controlling the passage of pressure fluid, com-
prising a plate that is arranged to slide upon a valve face having one or more
ports and is formed with one or more openings therethrough arranged corre-
spondingly to the said port or ports, and a frame or plate that is arranged at the
back of the valve so that it cannot move to and fro therewith and is provided at
the side next the valve with one or more recesses corresponding to the port or
ports in the valve face the arrangement being such that when the valve is opened,
pressure fluid can pass directly to the port or to one of the ports past the corre-
sponding end of the valve and also indirectly through the recess or the correspond-
ing recess in the frame or plate and the opening or the corresponding opening in
the slide plate, substantially as hereinbefore described, with reference to the
drawings.
2. A slide valve suitable for use in controlling the admission and exhaust of
steam to and from a steam engine cylinder constructed, arranged and operating
substantially as hereinabove described with reference to and shown in Figs. 1 to 4
inclusive of the accompanying drawings; or modified by providing the frame or
plate at the back of the valve with a hollow extension adapted to form an exhaust
passage as set forth.
3. A pressure fluid slide valve constructed, arranged and operating substantially
as hereinbefore described with reference to and shown in Figs. 5 to 8 inclusive of
the accompanying drawings.
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