Improvements in or relating to Valves.
Year: 1899

page_text: Improvements in or relating to Valves.
I, JOSEPH PRESTWICH, of Elm Bank, 72, Eccles Old Road, Eccles, in the County
of Lancaster, Manager, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in the construction of valves such as
are or may be employed either to admit or to withdraw fluid from a vessel or
vessels. The object of this invention is to avoid bends so as to obtain a direct
passage for the fluid from the vessel or reservoir to the outlet.
For this purpose I provide a rectangular or other preferred form of chamber
having a central inlet at one end with a valve fitted therein which is kept closed
by pressure on the exterior surface of the valve of the water or other fluid from
the source of supply to the reservoir. The aforesaid chamber has an opening on
either side by which a direct passage may be obtained from a tank or other
vessel or reservoir to which the valve may be applied, said openings forming
respectively inlet and outlet passages to and from the vessel or reservoir. In
order to open or close the outlet passage I fit a slide valve or valves to a spindle
by means of swivel links working in a groove in the said spindle which is passed
through a stuffing box in the end of the chamber herein before named.
The spindles of both the supply inlet and the outlet valves are end to end ond
are so arranged that though quite free from each other they will act together,
said inlet valve closing when the outlet valve opens and rize versa. This is
effected in the following manner: When the outlet is to be closed and water or
other fluid admitted to the reservoir the spindle of the slide valve is pushed
inwards by any mechanical means, the forward edge of the slide valve when
the valve is placed over the outlet comes into contact with the end of the
chamber, but the spindle to which the said slide valve is connected can travel
farther causing the swivel links that connect the slide valve to the spindle to
change from their ordinary diagonal position and to assume a rectangular or
nearly a rectangular position thereby forcing the valve to fit closely against the
edges of the outlet opening, the forward end of the spindle at the same time
coming into contact with the inner end of the supply inlet valve spindle and
opening the supply inlet valve.
When the slide valve spindle is withdrawn the supply inlet valve closes, the
slide valve connecting links return to their diagonal position and the pressure
being released the slide valve is withdrawn, when the water or fluid rushes in a
direct course from the vessel or reservoir through the outlet to effect the purpose
required.

page_text: •
I, JOSEPH PRESTWICH, of Elm Bank, 72, Eccles Old Road, Eccles, in the County
of Lancaster, Manager, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to improvements in the construction of valves such as
are or may be employed either to admit or to withdraw fluid from a vesssl or
vessels. The object of this invention is to obtain a full way valve that will avoid
bends so as to obtain a direct passage for the fluid from the vessel or reservoir
to the outlet.
The manner in which my invention is to be performed or carried into practical
effect will be readily understood on reference to the sheet of drawings hereunto
annexed and the following explanation thereof.
Fig 1 is a sectional elevation of a valve made according to this invention
showing the main inlet and outlet passages open and the supply inlet valve closed.
Fig. 2 is a like sertion of the same valve showing the slide in the valve covering
but not effectually closing the main inlet passage, and the supply inlet valve
still closed. Fig. 3 is a sectional elevation showing the slide in the valve
pressed over the aperture of the main inlet passage which is thereby effectually
closed, at the same time opening the supply inlet valve. In these drawings
similar letters refer to similar parts.
For the purpose of this invention I provide a rectangular chamber as a or a
chamber of other preferred form having a supply pipe at one end that is fitted
with a valve whose spindle projects into the end of the chamber when the
valve is closed by pressure on the exterior surface of said valve of the water or
other fluid from the source of supply in its course through the passage e³ to the
reservoir.
с
The aforesaid chamber has an opening on each side as d and by which a
direct passage is obtained from a tank or other vessel or reservoir to the point of
discharge of the water or other fluid.
In order to open or close the main inlet I fit a slide e to a spindle f by means
of swivel links g working in a groove in the said spindle which is passed through
a stuffing box at j in the end of the chamber a directly opposite to that through
which the spindle of the valve is inserted said spindles are thus end to end
and are so arranged that though quite free from each other they will act together.
the valve eclosing when the slide e opens and rice versa.
This is effected in the
following manner: When the main inlet is to be closed and water or other
fluid admitted to the reservoir from the source of supply the spindle f is pushed
inwards by any mechanical means and the slide e placed over the main inlet d,
the forward edge of the slide coming into contact with the end of the chamber
and the inner end of the spindle f meeting the end of the spindle c¹ that is pro-
jecting into the chamber as shown in Fig. 2. When the spindle f is pushed in
to the full extent it causes the swivel links g to change from their ordinary
diagonal position and to assume a rectangular or nearly a rectangular position
thereby forcing the slide which is faced with india rubber or other suitable
material to fit closely against the edges of the main inlet opening d, the forward
end of the spindle fat the same time pressing forward the spindle and opening
the supply inlet valve as shown in Fig. 3. When the slide valve spindle f is
drawn out, the supply inlet valve e is closed by the pressure of the water or other
fluid from the source of supply, the slide valve connecting links g return to their
diagonal position thereby releasing the pressure on the slide e which is then

page_text: withdrawn and the water or fluid rushes in a direct course through the openings d
and from the vessel or reservoir to effect the purpose required.
In order to retain the swivel links in a diagonal position until reaching the
main inlet d if the valve is so placed as to permit said links to naturally assume
a rectangular position and cause friction unless prevented, I provide a rib a in
the chamber at each side of the slide e upon which the side edges of said slide
rest until reaching the opening d where the ribs terminate with bevelled ends,
so that the slide may easily remount the ribs when withdrawn from the inlet, or
the slide o may have ribs formed thereon to fall into a recess on each side of
the opening d.
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 improved full way valve having a direct passage for water or other
fluid from a vessel or reservoir to the point of discharge and provided with a
slide as e which is connected to the spindle by swivel links as that are caused to
remain in a diagonal position until the period for closing the valve when by the
inner edge of the slide coming into contact with the end of the valve chamber
said links are forced into a rectangular position and the passage through the valve
effectually closed substantially as hereinbefore described.
2. A valve having a direct passage for water or other fluid from a vessel or
reservoir and a slide ase that is connected to the spindle of the valve by swivel
links as for closing said passage, in combination with a supply pipe to reservoir
having a valve whose spindle is acted upon by the spindle f to which the
slide is connected by swivel links so that the inlet to reservoir is opened when the
main passage to outlet from reservoir is closed and rice versa in the manner
substantially as and for the purpose herein before set forth.
Dated this 21st day of December 1800
GEO. DAVIES & SON,
Agents for the Applicant. 4, St. Ann's Square, Manchester.