Improvements in Steam and water valves.
Year: 1899

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 to be as
follows:
This invention relates to an improvement in valves that are employed for the
admission of water steam or other fluids, and is intended to obtain a direct
conduit for either inlet or outlet.
I provide a chamber that may be either rectangular or other preferred form
with an opening on either side by which a direct course may be obtained for the
passage of steam water or other fluid. I fit a slide valve on either side of a
spindle, one of the said valves being rigidly fixed to the spindle, and the other
connected to the spindle by means of swivel links working in a groove in the said
spindle. The spindle is passed through a stuffing box at each end of the
chambers and is moved by means of a screw and hand wheel or an equivalent.
In order to close the valve the spindle is screwed in causing both the inlet and
outlet openings to be closed; by screwing the spindle to the fullest extent, the
valve that is connected to the spindle by swivel links is pressed closely over the
opening by the aforesaid links which are caused to change from their ordinary
diagonal position and to assume a rectangular or nearly rectangular position.
By these means a simple and effective water tight or steam tight full way valve
is obtained that is applicable for general purposes.
•
3000
Improvements in Steam and water 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 and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:-
-
This invention relates to valves such as are employed for the admission of steam.
water, or other fluids, and is intended to provide a full way valve with a direct
passage or conduit for inlet and outlet in said valves so as to reduce friction and
wear. I effect the object named in the manner hereinafter described, reference
being made to the accompanying sheet of drawings in which Fig. 1 is a sectional
0.77

page_text: elevation of a valve made according to this invention showing the inlet and outlet
passages open Fig. 2 is a like section showing the same valve closed. In both
views 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 an opening on each side by which a
direct course may be obtained for the passage of steam, water, or other fluid;
I fit a slide on each side of a spindle cone of said slides d being rigidly fixed to
the spindle and the other d¹ connected to the spindle by means of swivel links e
working in a groove in the said spindle, as shown, or both of said slides
connected to the spindle by swivel links.
may
be
When the slides d and are not closed over the openings 6 the links connect-
ing the slide to the spindle are retained in a diagonal position either by
gravitation or by a rib f on which each side edge of the valve rests until reach-
ing the openings where the ribs terminate with bevelled ends so that the valve
may easily remount the ribs when withdrawn from said openings, or the slide
may have ribs formed thereon to fall into recesses in the wall of the chamber a.
The spindle is passed through a stuffing box as g at each end of the chamber
and is moved by means of a screw and hand wheel or an equivalent. In order
to close the valve the spindle is screwed in, causing both the inlet and outlet
openings to be covered by the slides and respectively. When the spindle
is screwed in to the fullest extent the slides & and are pressed closely over the
openings by the swivel links e being changed from their ordinary diagonal
position to a rectangular or nearly rectangular position in consequence of the
inner edge of the slide coming in contact with and pressing against the end
of the chamber before the spindle e has completed its traverse. The faces of
the slides may be covered with woodite, white metal, india rubber or other suit-
able substance. By these means a simple and effective water tight or steam
tight full way valve is obtained that is applicable for general purposes.
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:--
A steam and water valve having a direct passage for steam, water, or other
fluid, from the source of supply to the point of discharge and provided with slides
on either side of the valve spindle for closing said steam or water passage, one or
both of the slides being connected to the valve spindle by swivel links as e which
have and are caused to retain a diagonal position until when closing the valve
the inner end or ends of said slide or slides come into contact with the end
of the valve and cause the links to assume a rectangular position,
thereby effectually closing the steam or water passages substantially as herein-
before described.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.