IMPROVEMENTS IN STEAM AND WATER VALVES OR STOP COCKS
Year: 1886

page_text: I, GEORGE MAULE MARCHANT of Union Brass Works, Huddersfield Yorkshire,
Brass Founder do hereby declare the nature of my invention for "IMPROVEMENTS
IN STEAM AND WATER VALVES OR STOP COCKS," to be as follows:-
This invention consists in arranging the valve proper in steam and water taps or
stop cocks, so that the sediment or particles of dirt or other substance that may be
contained in or deposited from the steam or liquid as it passes through the valve
shall be prevented from passing between the valve proper and the seating
surrounding the inlet and outlet apertures, and also in so arranging the valve
proper and some portion of the valve casing that should any sediment or particles
of dirt remain in the valve after it is closed, such sediment or particles of dirt
will (on the valve being again opened) be removed therefrom by the force of the
water or steam passing through.
To carry out my invention I arrange that the valve proper should be split in
the centre at right angles to the direction in which the steam or water passes
through the valve. This division of the valve proper extends from the bottom to
a point near the top and ends in a small hole which is formed to give a certain
amount of elasticity or spring to the two halves or discs of the valve. When the
valve is inserted into the casing the discs bear tightly against the seating and
as the greater portion of the discs are always bearing against the seating it is
impossible for the split valve proper to open out or give either to the right or left,
consequently dirt or sediment is prevented from getting between the valve and the
seating and causing leakage.
In order to convey away the dirt or sediment that may be deposited from the
steam or water passing through the valve I form a chamber below the level of the
inlet and outlet apertures into which enters the lower or bottom end of the valve.
In this part of the valve is the steam or water way and I so arrange the working
of the valve that when closed the steam or water way is below the level of the
inlet and outlet apertures. When the valve is open the deposit (if any) can only
fall into the bottom of the water way and when the valve is again opened the force
of the steam or water removes it out of the valve.
”

page_text: By constructing valves as above described, a steam or water tight valve is
provided which prevents any dirt or gritty substance, or body from entering or
interfering with the working parts therein. A hand wheel and screw or rack and
pinion or other convenient devices may be employed for raising and lowering the
said valve.
A wedge may be placed in the bottom of the chamber, so that as the discs
forming the valve become worn by friction caused by opening and closing the
valve it can be lowered still further, the wedge entering into and between the two
discs forcing them apart tightly against the seating.

page_text: Improvements in Steam and Water Valves or Stop Cocks.
I, GEORGE MAULE MARCHANT, of Union Brass Works, Huddersfield, Yorkshire,
Brass Founder do hereby declare the nature of my invention for "IMPROVEMENTS
IN STEAM AND WATER VALVES OR STOP COCKS," and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :—
This invention consists in arranging, the valve of steam and water taps or stop
cocks, so that the sediment or particles of dirt or other substances that may be
contained in or deposited from the steam- or liquid as it passes through the valve
shall be prevented from passing between the valve and its seating; and also in so
arranging the valve and some portion of the valve casing that should any sediment
or particles of dirt remain in the valve after it is closed, such sediment or particles
of dirt will (on the valve being again opened) be removed therefrom by the force
of the water or steam passing through.
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 drawings
accompanying this specification. Fig. 1 is section of a valve having my improve-
ments applied thereto.
A is, the spindle of the valve which may be operated by either hand wheel or
key. The bottom of the spindle is screwed and receives the split valve plug which
is composed of two parts B and C, passing vertically through the outer valve
casing D, where E is the outlet and F the inlet. The split plug valve has a hole
through it as shewn at G, and in plan view Fig. 2, which is section through the
line a-b. In Fig. 1 the split valve is shewn in an open position with the hole G
in the split opposite the inlet and outlet openings in the valve casing. If therefore
sediment or dirt lodged in the bottom of the hole G, such sediment would be
carried out of the way when the split plug was lowered for the purpose of closing
the valve, which is done by lowering the split plug valve as shewn in dotted lines,
the part D of the valve casing being made deep enough to receive the lower end
of the plug valve.
If therefore sediment should lodge in the bottom of the hole, it would be no
detriment, as next time the valve was opened, the flush of steam or water would,
carry it away.
Fig. 3 is section of another valve similar in construction to Fig. 1, except that in
this case the valve is open when the plug is down, but closed when the plug is
raised. The bottom of the screw A is pointed so that when the valve is closed
the point of the spindle enters a taper opening c in the bottom of the hole G
for the purpose of forcing the sides of the plug against the seating so as to make
it a perfectly steam and water tight valve.
Fig. 4 is a sectional elevation and Fig. 5 cross section of another form of valve,
but in this case the split valve H has two flat sides, with a hole I through it, and
which is opened by raising the said valve so that the hole I is brought in a line

page_text: with the openings E and F. The sediment deposited from the liquid passing
through the valve, is washed out of the valve in the same manner as in the valves
previously described.
The flat valve is.shewn in plan Fig. 6.
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:-
Firstly. The employment of a split plug valve with an opening through it same
as represented at G.
Secondly. The employment of a split valve same as represented at H in Figs. 4
and 5.