An Improved Apparatus for Operating Throttle and similar Valves from a Distance.
Year: 1892

page_text: Date of Application, 4th Oct., 1892
Complete Specification Left, 3rd July, 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Operating Throttle and similar Valves
from a Distance.
I, WALTER PAYTON of 79 Sheen Park Richmond in the County of Surrey
Engineer do hereby declare the nature of this invention to be as follows:-
The object of the said invention is the provision of means whereby motive power
engine throttle valves whether of the oscillatory or reciprocatory kind and similar
valves may be operated from a distance either by hand or by an engine governor
or both without the intervention of ropes or the like objectionable appliances.
In carrying the said, invention into effect for use in a steam engine the throttle
valve is coupled in any convenient manner to a piston fitted within a cylinder in
such a way that reciprocations of the piston may cause the throttle valve to
oscillate upon its axis or move in the manner required for the proper working of
the particular kind of valve to which the piston may be connected. The said
piston is cylindrical but its ends are of unequal diameters and the cylinder con-
taining it is bored out in such a way that the unequal ends of the piston may move
steam-tight within it. The cylinder is arranged in relation to the steam pipe con-
taining the throttle valve in a way that will allow of the steam on the inlet side of
the throttle valve pressing constantly upon the small end of the piston and the
part of the cylinder containing the large end of the piston is connected by a pipe
or passage to the portface of a valve chest supplied with steam from the boiler or
from the inlet side of the throttle valve. In addition to the passage connecting
the portface of the valve chest with the large end of the cylinder the portface is
provided with an exhaust passage leading into the condenser or some other part of
the engine containing steam at a reduced pressure and the portface is provided with
a valve of any approved kind for connecting and disconnecting the two passages
in the portface when motion is given to the valve from the outside of the valve
chest.
The valve may have its stem fitted with a spanner or other suitable means for
moving it by hand or it may be coupled in any convenient way to the governor of
the engine in order that it may be operated directly by the governor.
When the
valve is moved in one direction the steam will be exhausted from the large end of
the cylinder and the piston will be moved into that part of the cylinder by the
steam pressing upon the small end of the piston but a contrary motion will be given
to the piston when the valve is shifted so as to allow steam to again press upon the
large end of the piston and such motions will be imparted by the piston to the
throttle or other valve for the purpose of closing or opening it.
The valve chest may be formed as part of the cylinder or it may be placed at any
desired distance from it and more than one such valve chest and valve may be
used for the purpose of operating the throttle valve from more than one position if
such should be desired.
D
1 .
COMPLETE SPECIFICATION.
An Improved Apparatus for Operating Throttle and similar Valves
from a Distance.
I WALTER PAYTON of 138 Sheen Road (late 79 Sheen Park) Richmond in the
County of Surrey Engineer do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
[Price 8d.]

page_text: ascertained in and by the following statement, reference being had to the annexed
sheet of drawings in which :-
Fig. 1 is a vertical section and Fig. 2 a horizontal section on line A Fig. 1
illustrating the said invention as arranged for operating a throttle valve of the
piston type and the mode of construction is as follows. The body part a is made
cylindrical but it may be of any other approved shape and its interior is formed
into the circular tube a' divided at a² so as to provide à passage by means of which
the interior of the tube may be isolated from or put in communication with the
interior of the body a.
The upper end of the tube a¹ is closed by the cover which is bolted to the body
in the usual way and the lower part of the body is faced at a³ in order that it may
be secured to the main steam pipe of the engine and the interior of the tube a¹ be
put in communication with the boiler. The body a is also formed at a into a
flanged pipe to enable it to be secured to the engine supply pipe and the general
arrangement of the parts of the body is such that all steam in its passage from the
boiler to the engine must proceed through the tube a' the passage a' and the outlet
pipe a*.
The interior of the tube a' is bored out cylindrically and has fitted within it the
throttle valve c which consists of a ring connected by arms to the central part c¹
which is formed at into the smaller portion of a differential piston the larger part
of which is connected to the smaller part by the rod d and nut d'.
The smaller part of the piston is made to more steam-tight within the bushes e e
fixed in the cover 6 in the manner shown in Fig. 1, and the larger part of the piston
is fitted so as to move steam-tight within the cylinder g which is flanged and fixed
upon the cover b by bolts in the usual way.
g
The cylinder 9 has its upper end formed into the stuffing box 9' through which
the rod d passes and it is provided with a small passage at 92 through which the
lower part of the cylinder g is put in communication with the condenser or the
atmosphere.
The cylinder g is also provided with a pipe at 93 through which steam from the
boiler is supplied to or exhausted from the upper side of the piston.
The normal or open position of the throttle valve c is that shown in Fig. 1, that
is to say the space in the cylinder g above the piston being exhausted by being
put in communication with the engine's condenser the steam in the tube a¹ pressing
upon the smaller end of the piston moves the piston and the valve c attached to it
into the position shown in Fig. 1, where the valve c does not obstruct the steam
but allows it to pass out of the tube and through the passage a³, but when steam
from the boiler is admitted to the cylinder g and on to the larger end of the piston
it exerts its force upon a greater area than that of the smaller end of the piston
and thereby forces the piston down the cylinder g and moves the ring c attached to
it down the tube a' and when such is done the ring c covers the passage a² and
entirely cuts off the communication between the tube a¹ and the outlet pipe a*.
By exhausting the steam in the space above the piston the reverse action takes
place and the piston and ring resume the position shown in Fig. 1.
The admission to and exhaustion of steam from the cylinder g may be controlled
by any suitable valve or cock but an illustration of a convenient valve for the
purpose is shown in connection with the cylinder g. in Fig. 1 where the steam chest
shown at his supplied with steam from the boiler through the inlet pipe /', and the
outlet pipe h³ and the cylinder 9 are either put in communication with the steam
chest or the exhaust passage ³ as desired by moving the slide valve * upon its
port face by means of the rocking shaft j which is made to engage with the interior
of the valve in the manner shown in Fig. 1. The rocking shaftj turns in bearings
formed in the chest h through one side of which it passes through a stuffing box of
the ordinary kind and it is provided with a spanner for the purpose of turning it.
This valve chest or any other kind of valve used in place of it may be located in
the manner above described at any required distance from the throttle valve,

page_text: 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
The throttle valve and valve for operating it from a distance shown in Figs. 1
and 2 consisting of various parts constructed combined and operating as above
described and for the purposes specified or any mere modification of them.
Dated this 3rd day of July 1893.
WALTER PAYTON.