Improvements in "Waste Preventing Valves" for Water Closets and other like Purposes.
Year: 1888

page_text: Improvements in "Waste Preventing Valves" for Water Closets
and other like Purposes.
I, GEORGE MITCHELL of St. Johns Road, Balby, near Doncaster in the County of
York Brass Finisher do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in the construction of water waste-preventing
valves which are especially applicable to Water Closet cisterns, and other kindred
purposes; the object of the invention is to construct a valve that will permit the
proper quantity of water to pass when it is raised, but will close automatically when
the said quantity has passed; and that cannot be held open by the chain, lever, or
other appliance by which the Valve is operated.
It consists of what I term a suction valve, that is a valve of two chief parts, one
being the part attached to the "pull" by which the valve is raised, and the other,
which is the heavier part being the valve proper which closes the outlet, and fits
upon the valve seat.
In carrying out my invention I make the valve proper of a short vertical cylin-
drical form the top part being preferably made hollow, or like the open end of a
tube; the bottom end is solid, and carries an indiarubber or leather face, of suitable
diameter to fit upon and close the opening round which is the valve seating; two
ears or lugs project from opposite sides at the lowest part of the valve, and fit over
vertical guide pins springing from the sides of the said seating.
The upper part which is attached to the " pull" is also tubular, open at the
bottom and closed at the top end, it is also provided at its lower edge with lugs
which fit upon the before mentioned guide pins; and the outside periphery of the
lower part or valve, and the inside of the top part being turned or otherwise
machined to correspond in such a manner that the top part will fit over or upon
the lower part sufficiently tight to produce a considerable amount of suction, when
the two parts are being separated or when under water and yet will allow the valve
to drop rapidly to its lowest position when open to the air.

page_text: The action of the valve is as follows, when for example it is fixed inside the flushing
cistern of a water closet; the valve in its normal position rests upon the seat of the
outlet and closes the same, and the top part attached to the pull, is also at its lowest
position enclosing the tubular or cylindrical part of the valve both parts being under
water and near the bottom of the cistern. On pulling the chain or other appliance,
the top part of the valve is raised, carrying the lower part or valve proper with it by
the force of suction, and holding it suspended above the seating until the water has
lowered sufficiently to allow the air to enter between the two parts and permits the
valve proper to fall and close the outlet.
If the operation is now repeated before the valve is covered with water, the loose fit
of the two cylindrical parts permits the ingress of air so that a vacuum or partial
vacuum cannot be formed of sufficient strength to lift and suspend the valve proper
and the outlet remains closed.
The said valve is readily adapted to start a syphon.

page_text: COMPLETE SPECIFICATION.
Improvements in "Waste Preventing Valves" for Water Closets
and other like Purposes.
I, GEORGE MITCHELL of St. Johns Road, Balby, near Doncaster in the County of
York Brass Finisher 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 improvements in the construction of water waste-preventing
valves which are especially applicable to Water Closet cisterns, and other kindred
purposes; the object of the invention is to construct a valve that will permit the
proper quantity of water to pass when it is raised, but will close automatically when
the said quantity has passed; and that cannot be held open by the chain, lever, or
other appliance by which the valve is operated.
It consists of (what I term) a suction valve, that is a valve of two chief parts, one
being the part attached to the "pull" by which the valve is raised, and the other,
which is the heavier part being the valve proper which closes the outlet, and fits upon
the valve seat.
The annexed sheet of drawings illustrates my invention being a sectional elevation
of a Valve constructed according to the following description.
In carrying out my invention I make the valve-proper A of a short vertical cylindrical
form, the top part B, being preferably made hollow or like the open end of a tube ;
the bottom end is solid, and carries an indiarubber or leather face C, of suitable
diameter to fit upon and close the opening round which is the valve seating D; two
ears or lugs E, project from opposite sides at the lowest part of the valve, and fit over
vertical guide pins F springing from the sides of the said seating.
The upper part G which is attached to the "pull" H, is also tubular, open at the bottom
and closed at the top end, it is also provided at its lower edge with lugs I which
fit upon the before-mentioned guide pins F, and the outside periphery of the lower
part or valve, and the inside of the top part being turned or otherwise machined to
correspond in such a manner that the top part will fit over or upon the lower part
sufficiently tight to produce a considerable amount of suction, when the two parts are
being separated or when under water and yet will allow the valve to drop rapidly to
its lowest position when open to the air.
The action of the valve is as follows; when for example it is fixed inside the flushing
cistern of a Water Closet; the valve A in its normal position rests upon the seat D,
of the outlet O and closes the same, and the top part G attached to the pull H, is also at
its lowest position enclosing the tubular or cylindrical part B of the valve A both parts
being under water and near the bottom of the cistern. On pulling the chain or other
appliance connected with the part H, the top part G of the valve is raised, carrying
the lower part or valve proper A with it by the force of suction, and holding it
suspended above the seating D, until the water has lowered sufficiently to allow the air
to enter between the two parts and permits the valve-proper to fall and close the
outlet.

page_text: If the operation is now repeated before the valve is covered with water, the loose fit
of the two cylindrical parts permits the ingress of air so that a vacuum or partial
vacuum cannot be formed of sufficient strength to lift and suspend the valve proper
and the outlet remains closed.
The said valve is readily adapted to start a syphon.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what
claim is :-
1 The combination and arrangement of the various parts forming a waste pre-
venting valve substantially as herein before described and as illustrated.
2-A waste preventing valve, consisting of a suction cylinder G, attached to the
"pull," in combination with a piston valve A acting together for the purpose specified,
and constructed substantially as herein before described and as shown.
R. F. DRURY,
Agent for the Applicant.