Water, Gas, or other Liquids.
Year: 1887

page_text: Date of Application, 12th Apr., 1887.
Complete Left, 3rd Aug., 1887.
Complete Accepted, 6th Sept., 1887.
5
Water, Gas, or other Liquids.
I GEORGE MAULE MARCHANT of Chapel Hill, Huddersfield, in the county of York,
Brass Founder, do hereby declare the nature of the said invention for IMPROVEMENTS
IN STOPPERS OR PLUGS FOR PARALLEL VALVES FOR STEAM WATER GAS OR OTHER
LIQUIDS to be as follows: —
The improvement is in the making or formation of a split stopper or plug which
will keep remain or work on the face of the valve when opening or closing the same.

page_text: COMPLETE SPECIFICATION.
Improvements in Stoppers or Plugs for Parallel Valves for Steam,
Water, Gas, or other Liquids.
I, GEORGE MAULE MARCHANT of Chapel Hill Huddersfield, in the County of York.
Brass Founder, 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 :-
My invention in parallel valves has reference to the plug or stopper employed for
opening and closing such said valves, and it is applicable to the form of valves as
patented by me on the 12th day of January 1886 No. 456.
My improvements consist in forming or splitting such stoppers into two parts, the
formation or splitting being angular or wedge-shaped, so that when the ordinary
screw employed for raising and lowering the stopper has carried it to the bottom of
the valve, the continued action of the screw will cause one portion of the split stopper
to descend somewhat further than the other portion of the split stopper, in doing
which the thickness of the stopper is increased, consequently the surfaces of the
stopper are made to bind tightly against the faces of the valve, and most effectually
close the same preventing the passage of steam, water, gas, or other liquids or fluids.
Such being the nature and object of my invention I will now proceed to describe the
same more fully, and for that purpose make reference to the accompanying sheets of
drawings wherein Fig. 1 is diagram of a valve having my improved stopper applied
thereto, such diagram shewing the valve casing to be in section for the purpose of
more clearly shewing the stopper or plug, which is formed or split as shewn by the
diagonal lines, such split plugs having an opening through them opposite the steam
passage as shewn in details Figs. 2 and 3 where A is one part of the stopper and B
the other part of the stopper having openings a through them, equal in area to the
passage b in the valve casing. Fig. 1 shews the stopper down and the valve closed,
whilst Fig. 4 shews section of a valve with the stopper elevated and the valve open.
Fig. 5 is another section taken through the line c-d in Fig. 4. From the drawings
it will be seen that the stopper is formed of two parts A and B, the outer surfaces
being parallel, whilst the inner surfaces are wedge shaped. These parts A and B are
made with recesses e and f for receiving lugs g projecting from the nut h, which nut
and consequently the plug are raised and lowered by means of screw C and hand
wheel D.
The action of the valve is as follows:-
:-
When it is required to close the valve, the hand wheel D is operated, making the
screw force down the nut h, causing the lugs g thereon to act upon both parts of the
stopper A and B in such manner as to force the said stopper down as illustrated in
Fig. 1, when practically the valve is closed. In order however, to absolutely make
the valve air tight and water tight, the movement of the hand wheel D is continued,
but as the part A can descend no further in consequence of the lug j projecting up

page_text: from the bottom of the chamber E the part of the plug B is made to descend a little
further see Fig. 1, in doing which the split plug is widened, forcing the outer surfaces
thereof tightly against the valve seatings, rendering the passage of steam or water
impossible. On the valve being opened the projection g commences to act against the
underside of the recess fin part B and lifted thereby before the lug g acts against the
underside of the recess e formed in part A. This arrangement of parts for acting
against the wedge B before wedge A (in the upward lift) allows the extreme
pressure of the split valve to be removed from the valve seatings before the plug
commences to rise, consequently there is very little friction on the surfaces of the
valve.
This construction of valve is also self cleaning, as if any sediment lodges within
the bottom of the openings a in the split stopper, such sediment would be carried
down within the opening a when the valve was closed, but, when the valve was next
opened, such sediment would be washed away by the next flow of steam or water.
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
In parallel valves the making or forming of a split stopper or plug as shewn in the
drawings and substantially as described herein.
Dated this 50th
1007
TASKER & CROSSLEY,
Halifax, Agents.