IMPROVE- MENTS IN VALVES
Year: 1884

page_text: I, WILLIAM PHILLIPS THOMPSON, Fel. Inst. P.A., of N° 6 Lord Street, Liverpool,
in the county of Lancaster, and 323 High Holborn, in the county of Middlesex,
Civil Engineer do hereby declare the nature of the said invention for " IMPROVE-
MENTS IN VALVES" as communicated to me by Robert Wrigley of Rosa, in the
North Western Provinces of the British East Indies, to be as follows:-
The improved valves for which provisional protection is desired are constructed
as follows:
The valve body or casing is cylindrical throughout, and has one, two, three, or
four branches which serve as inlets and outlets. ·
The valve is also made cylindrical, and the same diameter externally as the
internal diameter of the body or casing; the upper internal part of the valve
is conical, the lower internal part plain cylindrical, this cylindrical piece is then cut
lengthways into two, three, or four segments for the purpose of making the requisite
number of valves according to the number of openings to be closed or opened, and
so as to leave space for a guide stud or studs, passing through the outer casing, to
prevent the valves turning round, and to insure their always working on their
own seats.
The lower part of the body or casing is closed with a conical plug, which stops
the segmental valves when they are covering the openings, the conical end also
guides the valves to their seats in the casing, the upper parts of the valves are also
pressed outwards by a conical nut working on a screw and pressing on the internal
conical parts.
The lower end of the conical nut has a collar on which the valves are suspended
in opening, there are also one or two lugs on the nut to prevent its turning round
with the screw, and one or two studs in the casing to prevent the valves turning
and getting out of their places.
WP. THOMPSON & Co.,
Per J. O. O'Brien,
Agents for the Applicant,

page_text: studs I prevent the segments from turning round far enough for a junction of two
can come opposite a passage and thus cause leakage. In place of one stud I only,
two could be used as shown at Figure 9 in dotted lines. To open the valve,
the spindle is turned the reverse way, when the projection C catches on the flat
bottom of projection b¹ and lifts the valve proper, allowing free or restricted passage
as required.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
1st The manufacture of stop valves having a plug formed longitudinally in two
or more pieces kept from rotating by angular or protruding obstructions, and forced
against its seat when closed by two truncated cones, pyramids or their equivalent
projected into the plug proper and bearing against complementary conical or
pyramidal or equivalent surfaces in the interior of said plug, one of these outer
cones being carried by the spindle or its equivalent, substantially as described.
2nd In combination with a spindle having a truncated cone or pyramid (C')
pressing against a complementary cone or pyramid in the valve plug proper when
the valve is shut down, a ledge or projection (C³) carried by the valve spindle
pressing against a corresponding internal ledge in the plug when the plug is raised
substantially as described.