An Improved Stop Valve for Steam and other Fluids.
Year: 1890

page_text: Date of Application, 12th Sept., 1890)
Complete Specification Left, 12th June, 1891-Accepted, 18th July, 13:1
PROVISIONAL SPECIFICATION.
An Improved Stop Valve for Steam and other Fluids.
I, JOHN WESCOTT, of Wokingham, in the County of Berks, Paper Manu-
facturer do hereby declare the nature of my said invention to be as follows:-
My invention relates to the class of valves known as screw down valves, and
its object is to construct such valves in an improved manner, so as to render the
same absolutely fluid tight under very high pressures, and unaffected by expansion
and contraction of the metal.
My invention consists of a valve case, preferably formed in two parts, the upper
part containing the valve disc, rod and stuffing box, and the lower part carrying
the valve seat. Both parts are provided with flanges and are bolted together with
screw bolts or studs and nuts.
The valve seat is preferably made renewable, and consists of a short cylinder
driven or screwed into the casting, immediately above one of the passages. The
upper edge of the seat has a shallow annular groove.
The disc is attached to the spindle by two or more screws, which enter an
annular groove formed in the spindle, to allow the spindle to turn independently
of the disc. Other obvious means may be adopted for effecting the same object.
The underside of the disc, facing the valve seat, is fitted with any suitable elastic
material, which is held in position by a screwed cap or ring. In adapting the valve
for high pressure steam, I prefer to fit the disc with a ring or disc of canvas.
Upon this a ring or disc of rubber. Then, upon this, I place wire gauze; and
lastly a thin plate of copper.
The spindle passes through the usual stuffing box, fitted to the upper part of
the casing, and the upper end of the spindle has the usual screw, and hand wheel;
the screw fitting into a stationary nut, sustained by pillars, studs, or equivalent
devices.
The materials forming the packing of the disc, and also the form of the seat,
and other minor details, may be varied to suit the nature and temperature of the
fluid to which the valve is to be applied.
When the disc is screwed down upon the seat, the elasticity of the packing
causes it to adapt itself to the seat and form a perfect fluid tight joint.
Dated 12th September 1890.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.
COMPLETE SPECIFICATION.
An Improved Stop Valve for Steam and other Fluids.
I, JOHN WESCOTT, of Wokingham, in the County of Berks, Paper Manu-
facturer, do hereby declare the nature of my said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
My invention relates to the class of valves known as screw down valves, and its
object is to construct such valves in an improved manner, so as to render the same
absolutely fluid tight under very high pressures, and unaffected by expansion and
contraction of the metal.
My invention consists of a valve case, preferably formed in two parts, the upper
part containing the valve disc, rod and stuffing box, and the lower part carrying

page_text: the valve seat. Both parts are provided with flanges and are bolted together with
screw bolts or studs and nuts.
The valve seat is preferably made renewable, and consists of a short cylinder
driven or screwed into the casting, immediately above one of the passages. The
upper edge of the seat has a shallow annular groove.
The disc is attached to the spindle by two or more screws, which enter an
annular groove formed in the spindle, to allow the spindle to turn independently of
the disc. Other obvious means may be adopted for effecting the same object.
The underside of the disc, facing the valve seat, is fitted with any suitable elastic
material, which is held in position by a screwed cap or ring. In adapting the valve
for high pressure steam, I prefer to fit the disc with a ring or disc of canvas.
Upon this a ring or disc of rubber. Then, upon this, I place wire gauze and
lastly a thin plate of copper.
The spindle passes through the usual stuffing box, fitted to the upper part of the
casing, and the upper end of the spindle has the usual screw, and hand wheel; the
screw fitting into a stationary nut, sustained by pillars, studs, or equivalent
devices.
The materials forming the packing of the disc, and also the form of the seat,
and other minor details, may be varied to suit the nature and temperature of the
fluid to which the valve is to be applied.
When the disc is screwed down upon the seat, the elasticity of the packing
causes it to adapt itself to the seat and form a perfect fluid tight joint.
And in order that my said invention may be particularly described and ascer-
tained, reference is hereby made to the accompanying drawing, being a sectional
elevation of the invention.
a is the upper portion of the valve case, which is bolted to the lower portion >,
by bolts or studs and nuts. e is the valve disc. d is the valve rod or spindle, the
lower end having a groove e for receiving the ends of two or more screws ff, which
secure the valve disc to the spindle, leaving it free to rotate. is the stuffing box.
hh are two pillar bolts carrying the fixed nut k. The rod d has a male screw
formed thereon at d' working in the nut k. A hand wheel m is fitted to the rod d
as usual.
n is the valve seat, which may be driven or screwed into the lower
casing for purposes of repair or renewal. n' is a shallow annular groove formed
in the valve seat n.
The underside of the disc, (when fitted for steam) has a ring or disc of canvas o ;
upon this a ring or disc of rubber 7 is placed; next to this wire gauzer, and lastly
a thin plate of copper s; the whole being held in position by a ring t screwed into
the valve disc.
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 :-
1. The improved construction of stop valve, having a renewable valve seat n, a
disc c attached to a screwed rod or spindle d, the disc being fitted with suitable
elastic packing retained in position by a ring t, substantially as herein before
described and illustrated by the drawing.
2. The general construction, arrangement, and combination of parts together
constituting my invention of an improved stop valve for steam and other fluids,
substantially as herein before described and illustrated by the drawing.
Dated 10th June 1891.
GEO. DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.