Improvements in or relating to Valves.
Year: 1892

page_text: Date of Application, 3rd Nov., 1892
Complete Specification Left, 29th July, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to Valves.
I, THOMAS WALKER of Baxter's Works, United Alkali Company Limited,
St. Helens in the County of Lancaster, Engineer, do hereby declare the nature
of this invention to be as follows:-
:-
This invention relates to valves or cocks and is designed to provide a clear
passage through when open and in which the seating is not used as a guide for the
valve. It is especially suitable for liquids, gases, air, water, et cetera, and requires
no repairs such as grinding or trueing up beyond an occasional renewal of an
india-rubber ring.
In carrying my invention into effect, the valve seating is located above or below
the valve and the valve itself is operated in any suitable manner, such as by means
of a screwed spindle or nut and a gland for packing the spindle tight. The valve
is provided with a ring of india-rubber or other suitable material dovetailed or
otherwise fixed in the metal to form the valve faces This ring when pressed onto
the seating forms a perfectly tight joint and it is impossible for the liquid, air,
et cetera, to leak through. The seating forms an abutment against which the valve
is pressed. The inside surface of the outer casing forms the guide for the valve or
ribs and may be fitted on the inside to guide the valve in the required direction.
..
In cases where the valve seating is placed below, a valve seating may also be
provided above the valve, whereby when the valve is opened, the valve presses
upon this upper seating and entirely prevents the passage of the liquid, air,
et cetera, to pass beyond this seating and it is impossible for it to leak through the
gland.
Dated this and
1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Valves.
I, THOMAS WALKER, of Baxter's Works, United Alkali Company Limited,
St. Helens in the County of Lancaster, 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 and is designed for the purpose of providing a
clear passage through the valve seating and to prevent leakage through the gland
or stuffing box of the valve spindle. It is specially suitable for gases under
pressure which carry with them solid particles, or for liquids holding solids in
suspension. The chief features of valves constructed in accordance with my
invention are freedom from repairs such as grinding or skimming, clear passage
through the seating for solid particles, and absence of leakage at the gland.
In carrying out my invention, the valve seating may be located either above or
below the valve as the circumstances of the case may require.
If the apparatus of which the valve forms a part requires the valve to be usually
open when under pressure, I provide the valve with two valve seatings, one below
the valve and one above it, on the under side of the valve cover, against which

page_text: when the valve is fully open, the upper side of the valve presses and entirely
prevents any leakage or passage through the gland of any liquid or gas.
If the apparatus of which the valve forms a part requires the valve usually
closed when under pressure, I so arrange the valve and its seating that the liquid
or gas under pressure tends to press the valve against its seating which is placed
between the gland of the valve spindle and the valve disc. By this means I
prevent access of the gas or liquid under pressure to the gland of the valve spindle
when the apparatus is under pressure. and the valve closed and I avoid the necessity
of a second seating.
In both cases I provide the valve faces with india-rubber rings dovetailed or
otherwise fixed in the metal. This ring when pressed on its seating forms a
perfectly tight joint. The seating itself forms an abutment against which the
valve is pressed. By this arrangement, the necessary repairs reduce themselves to
an occasional renewal of the rubber ring. Any other sufficiently. elastic substance
may be used instead of rubber to form the valve facing.
The valve is guided by guides which do not pass through the seating, but are
situated on the opposite side of the valve face, so as to have a clear passage through
the seating. The valve is actuated as usual by a spindle passing through a gland or
stuffing box.
In order to describe more fully the principle of my invention, I have annexed
hereto a sheet of drawing representing the mode of carrying out-my invention, but
I do not confine myself to the exact details as shown in those drawings as these
may be varied without deviating from the principle.
Figures 1 and 2 represent section and plan of a valve which I have specially
designed for conveying gases under pressure, and which is of the type above
referred to where the valve is generally open when at work.
The valve C has two faces formed by the two india-rubber rings D and D¹ let in
and dovetailed into the metal. These faces fit upon and press against the two
seatings E and E' respectively, when the valve is open or shut. As long as the
valve is fully open, as shown in the drawing, the rubber ring D presses against the
seating E under the valve cover and prevents any of the gas or liquid passing
through or leaking through the gland J. It is best to place the valve so that the
gas or liquid travels through it in the direction as shown by the arrow, in that case
no leakage will occur through the gland when the valve is closed, that is the
pressure of the gas is below the valve and its seating and must open the valve or
leak through it before it has access to the gland.
The valve is guided by the tubular valve case F. G is the valve spindle fastened
to the valve by means of the protuberance or head held by the screw gland H
which is screwed into the valve.
The absence of valve-wings insures an absolutely clear passage for the gas or
liquid through the valve seating.
Figure 3 is an elevation partly in section and Figure 4 a plan of a valve of the
second type, which is usually closed when the apparatus connected with it is under
pressure. The valve represented in the drawing is one which serves to introduce
liquids and the like into vessels, wherein after the valve has been closed, the liquids
are subjected to pressure. In this case, the pressure below the closed valve tends
to press the valve against its seating and no leakage is possible through the gland
of the valve spindle, hence a second seating can be dispensed with.
The face of the valve C is conical, and into a groove of the face the rubber
ring D is let in, dovetailed. The inclined position of the face secures the removal
of any gritty matter or solid particles, by the liquid when passing through the
valve in the direction shown by the arrows. When the valve is closed, the rubber
ring D presses against the seating E which is formed by a metal ring rounded off
at its corners and inserted between the two flanged parts of the valve casing.
The lower part of the casing has cast on to it the guides F which direct the
movement of the valve. The valve is fastened to the spindle by the nut H.

page_text: 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. An arrangement of a valve provided with two seatings and two faces formed
by elastic rings substantially as described and for the purposes set forth.
2. An arrangement of a valve having only one seating and only one face formed
by an elastic ring, the valve and its seating being so placed that the pressure of the
liquid tends to close the valve, substantially as described and for the purposes set
forth.
3. The construction of valves substantially as and for the purposes described and
set forth in the accompanying drawings.
Dated this 27th day of July 1893.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.