AN IMPROVED CONSTRUCTION OF STOP VALVE
Year: 1884

page_text: "
I, WILLIAM WHITELEY, of the firm of William Whiteley and Sons, of Lockwood
near Huddersfield in the County of York, Machine Makers do hereby declare the
nature of my invention for "AN IMPROVED CONSTRUCTION OF STOP VALVE,"
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
This Invention has reference to that class of valve wherein an inclined hinged
flap is employed having a spindle at an angle thereto, and for which Letters Patent
were grauted to me. on the 15th of March A.D. 1882 N° 1257. My present
Improvements consisting in a new method of or arrangement for securely closing
the steam or water passage and to make the valve more easily operative under back
pressure upon the hinged flap; and in order that the Invention may be better
understood, reference is made to the accompanying Sheet of Drawings wherein
Fig. 1 is a side view of my improved valve; parts being cut away, and others in
section; Fig. 2 is a side view of same, with part cut away to shew interior of body;
Fig. 3 is a detail front view of the carrier block; Fig. 4 is a detail rear view of
same; Fig. 5 is a view in vertical longitudinal section on a plane at right angles to
the plane of view of Fig. 1; Fig. 6 is a detail edge view of the flap shewing the
side grooves. Fig. 7 is a detail top view of the flap.
In the accompanying drawings the letter a denotes the body or shell of a valve
as a whole; b is a vertical branch (with usual stuffing box) in which the spindle c
and carrier flock d are arranged to operate; e is an angular branch giving access
to the flap f when the valve is inserted in a line of pipe.
The flap is pivoted to the body a and carries the rotary disk g which covers
the steam way in the inclined valve seat i. The stem g¹ of the rotary disc g has
a slotted head by which the disk may be ground to its seat by means of a screw
driver inserted through the branch e.
The bottom of the spindle is provided with a collar c¹ which enters laterally into
an open socket or groove in the top of the carrier block d by which means the
spindle cau rotate freely in moving the block to open and close the valve. The
carrier block d is cut away centerally below the socket (see Figs. 1, 3 and 4) for
the free passage of the stem g¹ of the valve, forming what may be called the
wings or legs d₁ of the block.
The front and rear edges of these wings or legs are parallel with each other, and
with the axis of the spindle, the front edges d' of the wings being in sliding contact

page_text: with the guides a³, cast on the body a; whilst the rear edges d³ bear against the
guides as also formed on the inner side of the valve body; these guides a³ and a³
are parallel with each other, and are made vertical as shewn in the drawings.
Upon the inner sides of the wings d' are lugs d' which take into grooves f', on
each side of the flap f, and by means of these the flap is raised and lowered as the
carrier block is reciprocated by the spindle.
The parts of the wings of the block forming the bearings d³ are thrown out
laterally slightly beyond the sides, and the part d' of each wing, just inside the
vertical bearing faces is inclined to the plane of the front bearings d forming with
them a wedge as seen in Figs. 1 and 2, the rear or underside of which bears upon
the back of the flap on either side of the stem. This construction of the back of
the block d is shewn in detail in Fig. 3 and also in Fig. 2 which shews the inclined
surface in contact with the back of the flap.
Devices similar to the wedge have been used in sliding valves, but under back
pressure the block with the wedge feature alone is apt to spring the spindle, and
jam; when the valve is being opened under pressure. The same defect would exist
in my form of valve in which a hinged flap is used, but it is remedied by means
of the carrier block d and guides a² and a³ formed on the body of the valve.
Another method of arranging the valve is shewn at Fig. where it will be seen
that the spindle c is not connected to the hinged flap ƒ but that the bottom part
of the spindle bears upon the back of the tap, which arrangement converts the
valve into a combined stop and check valve. It will be understood that when the
spindle c is raised from contact with the flap that the pressure of steam or water
will lift the flap and escape thereby, but when the spindle is lowered with the
point bearing upon the flap the valve will be closed. This combined valve is useful
for a variety of purposes; such for instance is the case when working in connection
with a pump, as the water space or opening can be limited or regulated as required,
It will
whilst at the same time the valve is working and acting as a check valve.
be further understood that when this combined check and stop valve is working in
connection with a pump, that the pump can continue to lift water at its full capacity
while the valve can be regulated to take only a given quantity.
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,
Firstly. In combination with an inclined hinged valve of a carrier block d
having front and rear bearings d³ and d³, working or sliding between guides a²
and as in manner substantially as herein shewn and described.
Secondly. In combination with the carrier block working between slides, of an
inclined bearing capable of forming and acting as a wedge against the back of the
hinged flap, substantially as herein shewn and described.
Thirdly. In combination with a hinged flap and vertical spindle, I claim the
use of the spindle detached, but capable of bearing upon the back of the hinged
flap for purposes explained, whereby the valve answers the double purposes of a
check and stop valve.
Dated this fourth day of January 1884.