Improvements in and relating to Stop Valves.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Stop Valves.
JOHN HODKINSON, of 33, Union Street, Burton-on-Trent, Engineer, do hereby,
declare the nature of this invention to be as follows:-
This invention relates to improvements in stop valves for steam and water,
the object of the invention being the construction of a stop valve which can be
opened and closed without turning the valve spindle, and in which the valve
spindle and the stuffing box are not subject to the action of the steam or water
when the valve is closed, also the provision of means for indicating the position
of the valve relatively to its seat.
According to this invention the valve is placed below its seat and on the under-
side of the valve there is a square spindle or projecting pieces which are fitted to
slide in corresponding holes or recesses in the valve casing or a cap fitted thereto,
the valve and spindle being thereby prevented from turning. Above the valve
and rigidly attached thereto is a spindle which is screw threaded at its upper
end, and in the spindle stuffing box there is a nut to which there is attached a
hand wheel for opening and closing the valve. The spindle, above or below the
valve, is also fitted with a pin which slides through a stuffing box and projects
outside the valve casing for indicating the relative positions of the valve and
seat. The valve may be metal, or it may be fitted with a rubber, woodite or other
similar washer, and the nut may be carried by a bow placed above the spindle
gland.
Dated this 19th dow of December 1898
Improvements in and relating to Stop Valves.
JOHN HODKINSON, of 33, Union Street, Burton-on-Trent, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements in stop valves for steam and water,
the object of the invention being the construction of a stop valve which can be
opened and closed without turning the valve spindle and in which the valve
spindle and stuffing box are not subject to the action of the steam and water when
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the valve is closed, also the provision of means for indicating the position of the
valve relatively to its seat.
According to this invention the valve is placed below its seat and on the under-
side of the valve there a square spindle or projecting pieces which are fitted to
slide in coresponding holes or recesses in the valve casing or a cap fitted thereto,
the valve and spindle being thereby prevented from turning. Above the valve
and rigidly attached thereto is a spindle which is screw threaded at its upper end
and in the spindle stuffing box there is a nut to which there is attached a hand
wheel for opening and closing the valve. The spindle above or below the valve
is fitted with a pin which slides through a stuffing box and projects outside the
valve casing for indicating the relative positions of the valve and seat. The valve
may be metal or it may-be fitted with a rubber, woodite, or other similar washer,
and the nut may be carried by a bow placed above the spindle gland.
In the drawings which are attached hereto
Fig. 1 is a section of a válve more particularly, suitable for hot water and
other liquids and
Fig. 2 is a section of a valve more particularly suitable for steam.
In the valve shown in Fig. 1, the casing 1 which is supposed to be of cast iron
is fitted with a gun métal valve seat 2; and at the bottom is closed by a cap 3 upon
which is formed a boss 4 having a square opening for the spindle 5. The valve
in this arrangement consists of a plate 6 which is recessed for a washer 7 of
woodite, rubber, leather or other similar and suitable material, such washer being
held in position by a metal washer 8 and nut 9. At the top of the valve there
is a piece 10 in which is formed the valve stuffing box 11 and which carries the
spindle nut 12, the nut and screw being thus kept outside the valve. The piece 10
as shown is bolted to the casing 1 but it may be screwed thereto or connected by
any other well known means. The spindle nut 12 is held in position by a lock
nut 13 and is provided with a hand wheel 14.
In the valve shown in Fig. 2 the casing 1" which is supposed to be of cast iron is
fitted with a gun metal scat 15 which is preferably provided with a central
boss as shown for guiding the spindle 18. The valve 17 is formed
in one piece with the spindle 18 and on its under side is shaped, to receive
a plate 19 which is fastened thereto, and fitted to slide in grooves formed on the
inside of the casing by strips 20, or a single strip 20 may be used and the plate
be grooved to slide thereon. The strip or strips 20 may be cast on or fixed to
the cover 16 and when this method of preventing the valve turning is used in con-
nection with valves which do not require to be ground in" the arms sliding on
or between the strips 20 may be cast on the valve or valve spindle. At the top of
the casing is a boss 21 carrying the stuffing box 22 which is arranged to hold
down the nut 23 but allow of the same being turned by a hand wheel 24 fixed
thereto. The upper end of the valve is screw threaded and carries a pin 25 which
projects through a stuffing box 26 at the top of the nut 23 and indicates the
relative position of the valve 17 and its seat 15.
In modifications of the arrangements herein shown either of the valves may be
prevented from turning or may be actuated by either of the methods set forth
or the valve in Fig. 1 may be prevented from turning by wings above it sliding
in grooves in the valve seat, or a winged valve may be used in combination with
a square spindle and hole under the same, or the central boss carried by the
valve-seat may be squared. The indicating pin may in either arrangement be
carried through a gland in the bottom cap, and the pitch of the screw thread
may be varied.
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. A stop valve constructed and arranged substantially as herein described
74
T

page_text: 2. A stop valve constructed and arranged substantially as herein described with
reference to Fig. 2 of the accompanying drawings.
Dated this 6th day of June 1899
W. H. POTTER,
Patent Agent, Wheeler Gate, Nottingham.