Improvements in Valves for Automatically Controlling and Reducing Gases, Air, Steam, and other Fluids from a Higher to a Lower Pressure.
Year: 1895

page_text: Date of Application, 9th Apr., 1895
Complete Specification Left, 9th Jan., 1896-Accepted, 29th Feb., 1876
PROVISIONAL SPECIFICATION.
Improvements in Valves for Automatically Controlling and Reducing
Gases, Air, Steam, and other Fluids from a Higher to a Lower
Pressure.
I, SIDNEY STUART WALKER of Woodside, Knowle Warwickshire Engineer
do hereby declare the nature of this invention to be as follows:-
This invention relates to valves for automatically controlling the delivery of, and
reducing gases, air steam and other fluids, from higher to lower pressures. The
invention consists of the employment of a diaphragm, preferably made in bellows or
annular form, operating upon a screw either by means of a rack and pinion or by a
lever. This screw opens and closes a valve which controls the delivery of the
higher pressure gases. In place of the rack and pinion the diaphragm may operate
on the valve by means of a knuckle or other joint placed between two levers in
such a manner that when the diaphragm is distended the levers are thereby
lengthened and so close the valve. The desired pressure of the delivered gasescis
controlled by means of springs or weights. The said springs or weights also insure
the return of the diaphragm after its distension.
Dated this 8th day of April 1895.
SIDNEY STUART WALKER.
COMIT LEIE DI CITRAL
Improvements in Valves for Automatically Controlling and Reducing
Gases, Air, Steam, and other Fluids from a Higher to a Lower
Pressure.
I SIDNEY STUART WALKER of Woodside Knowle, Warwickshire, 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 valves for automatically controlling the delivery of,
and reducing gases, air, steam, and other fluids, from higher to lower pressures.
The invention consists of the employment of a diaphragm, preferably made in
bellows or annular form, operating upon a screw by means of a rack and pinion.
This screw opens and closes a valve which controls the delivery of the higher
pressure gases. In place of a rack and pinion the diaphragm may operate on the
valve by means of a knuckle or other joint, placed between two levers, in such a
manner that when the diaphragm is distended the levers are thereby lengthened
and so close the valve. The desired pressure of the delivered gas is controlled by
means of springs or weights. The said springs or weights also ensure the return of
the diaphragm after its distension.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto a sheet of drawings upon which I have
fully illustrated the nature of my said improvements and the mode of carrying the
same into effect.

page_text: Figure 1 is a vertical section through one of my valves shewing the operating
mechanisms in sectional elevation.
Figure 2 is a part vertical section through the same valve, but taken in a reverse
direction to Figure 1 and shewing the operating mechanism in cross section.
Figure 3 is a part similar section to Figure 1 but shewing a modification in the
operating mechanism to a reduced scale.
Figure 4 is a broken off view shewing the string attachment of the diaphragm to
the flange b³.
In carrying my invention into effect I mount the diaphragm A upon the vertical
guide rods a and a which are supported at 61 and 6 by the casing B of the
chamber. The diaphragm is preferably of the annular or cupped form shewn,
which ensures a more sensitive action and consists of any suitable flexible air or gas
proof material and is attached to the flanges of the chamber B at as by means of
the string which is wound round the diaphragm as shewn by Figure 4 or an
annular conical wedge 6, may be provided which causes the diaphragm to make a
gas tight joint. A strengthening metai cup a' is fixed above the diaphragm. The
toothed rack C is connected with the diaphragm A and is arranged between the
guide rods a¹ and a³, so as to operate the toothed wheel E, which is provided upon
the screw F, the said screw being mounted in the tapped socket f', which is secured
at to the casing of the chamber. At the end of the screw rod f' the valve H
is provided, being made to slide into, and have a seating against the inlet K. To
reduce the friction the valve F is mounted upon the rod f2, through the medium of
the ball bearings h'. The desired pressure of the delivered gas is controlled by
the weights M, or in lieu of this a spring N may be provided as shewn by dotted
lines, and these springs or weights or both also ensure the return of the diaphragm
after its distension. The action being as follows, upon the increase of the pressure
of the gas at the entrance K the diaphragm A is distended the rack C is raised and
the pinion E revolved by which means the screw F is caused to travel forward
and thus proportionately close the valve H. In place of the rack pinion and screw
arrangement, I may substitute the toggle or knuckle joint illustrated in Figure 3,
where the one part P is attached to the diaphragm, another part P' to the chamber
casing B at and the remaining arm p' is connected with the valve H by the
rod which slides in the bearing 6. In this case any suitable guiding rods a*
working in sockets are provided to ensure the vertical movement of the
diaphragm, the pressure in this case being controlled in a similar manner to that
previously described with reference to Figure 1-and-2. The action is as follows.
Upon the increase of the pressure of the gas at the entrance K the diaphragın A
is distended and the arms P and P1 being thus straightened and lengthened the
valve H is proportionately closed by the longitudinal movement of the connecting
arm p².
The seat of the valve may be made detachable and I may vary the various
details without departing from the nature of my said invention; as for instance
the position of the arm P' may be so arranged as to straighten horizontally instead
of vertically.
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-
1st. In valves for automatically controlling and reducing gases, air, steam, and
other fluids, from a higher to a lower pressure, the rack pinion and screw arrange-
ment for operating the valve by the action of the diaphragm, substantially as
herein set forth and shewn by Figures 1. and 2.
2nd. In valves for automatically controlling and reducing, gases, air, steam, and
other fluids, from a higher to a lower pressure, the toggle or knuckle joint arrange-
ment for operating the valve by the action of the diaphragm, substantially as
herein set forth and shewn by Figure 3.
3rd. In valves for automatically controlling and reducing gases, steam, and other

page_text: fluids, from a higher to a lower pressure, the annular or cup shaped diaphragm,.
substantially as and for the purpose herein set forth and shewn.
4th. In combination with the rack pinion and screw arrangement the ball.
bearings to valve substantially as herein set forth and shewn.
Dated the Eighth day of January 1896.
SIDNEY STUART WALKER..