Improvements in Stop Valves for High Pressure Steam and other Fluids.
Year: 1893

page_text: Date of Application, 3rd Feb., 1893
Complete Specification Left, 3rd Nov., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Stop Valves for High Pressure Steam and other
Fluids.
I, GARRATT PAYNE of 17 Aliwal Road, Clapham Junction in the County of
Surrey, Engineer do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a construction of stop valve which shall
be especially suitable for high pressure steam and whereby the following
advantages are obtained, viz.: that a full way opening is provided, that the valve
can be opened full with the least exertion, and likewise be slightly opened to serve
the office of a bye-pass for warming or draining the pipes, that the valve can be
made and maintained steam tight, that the working or actuating parts of same are
not exposed to the direct action of the steam and thus not liable to be clogged or
corroded, and that the seats or faces are easily renewable.
The valve is constructed somewhat on the principle of a sluice valve with two
facing parts forming what is called a gate and seats. Between the two facing
parts forming the gate or valve I provide a wedge appliance operated by a spindle
within the spindle for raising the gate or valve in such manner that when the inner
spindle is raised to a small extent the facing parts are slightly drawn together or
away from their seats, so that a slight amount of steam can pass through as
required for warming the pipes or draining; that having been effected the main
spindle can be operated so that the valve is raised leaving an entirely full or free
passage for the steam. The extent of lift of spindle shews the extent of opening
whether fully or partly open. In closing, the main spindle is first operated, and
when the valve has been brought quite down, the inner spindle is turned so as to
bring the two facing parts of the valve tightly up against their seatings. Or
instead of operating the wedge or cam by a spindle within the valve spindle I may
use a groove cam which is turned by a key passing out to one side of the casting.
In one construction I connect the main spindle with a carrier ring made in two
halves bolted together. The facing parts or "gate" have each two lugs entering
the said carrier ring so as to be carried thereby. These lugs serve also to receive
the pins for a roller on each and between the said rollers is fitted a wedge. The
rollers and wedge are contained within a. wedge shaped sling or frame on the lower
part of the inner spindle. When the inner spindle is raised to a slight extent
the wedge follows its movement and is thereby withdrawn from between the two
rollers but the latter are simultaneously by the two opposite sides of the sling
frame drawn a little towards each other whereby the facing parts of the valve or
gate are drawn off their seats and a small amount of steam can pass through. The
inner spindle is by preference continued beyond the sling frame so that it can be
guided in the carrier ring. In this construction I avoid the effects of unequal
expansion by heat such as jambing and injury done to working parts.
AT 1
1000

page_text: COMPLETE SPECIFICATION.
Improvements in Stop Valves for High Pressure Steam and other
Fluids.
I, Garratt Payne formerly of 17 Aliwal Road, Clapham Junction, in the
County of Surrey, but at present of 28 Comyn Road, Clapham Junction aforesaid,
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 :-
The object of this invention-is-to-provide a construction of stop valve which shall¯|
be especially suitable for high pressure steam and whereby the following advantages
are obtained viz. that a full way opening is provided; that the valve with the least
exertion can be opened fully and also be slightly opened to serve the office of a
a bye-pass for warming or draining the pipes; that the valve can be made and
maintained steam tight; that the working or actuating parts of same are not
exposed to the direct action of the steam and thus not liable to be clogged or
corroded; and that the seats or faces are easily removable.
The valve is constructed somewhat on the principle of a sluice valve with two facing
parts forming what is called a gate and two corresponding seats.
Between the two
facing parts forming the gate or valve I provide a wedge appliance operated by a
spindle within the spindle which serves for raising the gate or valve, all so arranged
that when the inner spindle with the wedge is raised to a small extent the facing
parts are drawn slightly together, that is to say, away from their seats, so that a
slight amount of steam can pass through, as required for warming the pipes or
draining. That having been effected the main spindle can be operated so that the
valve is raised, leaving an entirely full or free through passage for the steam.
The extent of lift of spindle shews the extent of opening whether fully or partly
open. In closing, the main spindle is first operated, and when the valve has been
brought quite down, the inner spindle is turned so as to bring the two facing parts
of the valve tightly up against their seatings. Or instead of operating the wedge
or cam by a spindle within the valve having two facing parts it may be made
with one.
Figure 1 is a vertical longitudinal section, Figure 2 a part sectional end view
and Figure 3 a sectional plan view of one construction.
The valve consists of two sluice-like facing parts A which make joint against
the seat B. The main spindle E is at its lower end fitted or connected to a carrier
ring F made in two halves bolted together by the screw bolts and nuts F¹. This
carrier ring is formed with a feather F2 on each side working in corresponding
guides in the casting. The facing parts A forming valve or gate have cach two 3
lugs A¹ which enter the carrier ring F so as to be carried thereby but with clearance
between. These lugs A¹ serve also to receive the pins G for a roller H on each,
and between the said rollers is fitted a wedge C. The rollers H and wedge C are
contained within a wedge-shaped sling or frame I on the lower part of a spindle D
within the main spindle E. When the inner spindle D is raised to a slight extent 4
the wedge C follows its movement and is thereby withdrawn from between the two
rollers, but the latter are simultaneously by the two opposite sides of the sling
frame I drawn a little towards each other whereby the facing parts A of the valve
or gate are drawn off their seats and a small amount of steam can pass through.
The inner spindle D is by preference continued down beyond the sling frame at D 4
and this continuation passes through the lower part of the carrier ring F and aids
in taking the strain off the sling I when the pressure of the steam is unequal on
the opposite sides of the gate. By making a screwed hole in the bottom of the
continuation D' I am enabled to remove the plug or cock K and insert a bolt
which shall hold down the spindle D which has previously been tightly screwed 5
down. I am then enabled to remove the glands cover and hand wheels so that any

page_text: of these parts may either be removed and replaced or repaired or the glands
repacked while the valve remains under steam. S S are stops bolted to the casing
to prevent the seats from rising or altering their position when the gate is
raised.
Figure 4 is a vertical section through a valve with only one facing part A which
passages
makes joint against the seat B. The casting may have its inlet and outlet
at right angles as shewn in full lines or opposite to each other as shewn in dotted
lines. The part A has two lugs A¹ which as in the previously described con-
struction enter the carrier ring F made in two halves and having guide feather F
on each side. The carrier ring F is connected to the main spindle E as before.
The inner spindle D has at its lower end a wedge-shaped sling or frame I which
has a slightly slanting groove C in which works a pin G and roller H (or a pin
alone) the said pin being mounted in the lugs A¹. Hence when the inner spindle is
When thereupon
raised the facing part A is drawn slightly away from its seat.
the main spindle E is raised the carrier ring F with the facing part or sluice
valve A is raised therewith as in the previous example.
In valves made according to my invention I avoid the effects of unequal expan-
sion by heat such as jambing and injury done to the working parts.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1. A sluice or gate valve consisting of one or two facing parts for making joint
with a seat or seats in the casting said facing part or parts being connected to a
spindle for raising and lowering the valve and having lugs or brackets carrying
pins or pins with rollers mounted thereon, said rollers being adapted for bringing
the facing parts tightly up against the seats or away from the same substantially as
set forth.
2. The combination of parts forming the sluice or gate valves described with
reference to the drawings."
Dated thin 2nd der of November 1893.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.