Improved Float Valve Apparatus for Cisterns, Tanks, and the like.
Year: 1899

page_text: Date of Application, 27th Apr., 1899-Accepted, 1st July, 1899
COMPLETE SPECIFICATION.
Improved Float Valve Apparatus for Cisterns, Tanks, and the like.
I, HANS VON HOSSTRUP, of No. 13, Schopenstehl, Hamburg, Germany, Merchant,
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 an improved construction of float valve apparatus for
cisterns, tanks and the like which, is especially suited for high pressure water supplies.
With this construction of valve apparatus, a part of the valve body, on the sinking
of a float in connection therewith, is displaced in such manner, that a chamber
formed above the valve has its contents discharged, whereby a partial vacuum is
formed in the chamber which facilitates the raising of the main part of the valve
body so as to uncover the full area of the valve opening.
On the accompanying drawing is shewn by way of example one arrangement of
valve apparatus constructed according to my said invention.
Fig. 1 shews a longitudinal section of the valve apparatus in the opened
position.
Fig. 2 a longitudinal section of the same in the closed position, and Fig. 3 a
cross section.
The valve body a is contained in a casing b and is capable of vertical motion
therein being ground in so as to work with an easy fit.
The valve body is of a solid cylindrical form and preferably of a material that
will not rust. The water supply to the casing is effected through a lateral branch
pipe c the bore of which, as shewn at Figs. 1 and 2 is flattened out where it enters
the casing b. The bottom of the casing is closed by a screwed cape on which is
formed the discharge nozzle f. This discharge nozzle has a lateral opening through
which the lever arm i of the float passes, the lever being pivotted to a pin / fixed in
projecting lugs g at the sides of the opening.
The cap e has a flange which bears against an angular projection provided on
the lower end of the casing, forming a metallic air-tight joint therewith, an
elastic packing ring t being provided at the upper end of the cap for providing
an additional water tight joint; the disc t is at the same time made to form the seat
for the valve a. The latter is slightly reduced in diameter at its lower end and its
underside is hollowed out so as to form an annular surface which seats on the
packing t.
By means of this form of the valve also the area for the passage of the water is
made as great as possible. The valve has a central passage through which passes
loosely a stem to the lower end of which is secured a looped piece m with which
engages the end of the float lever i. The upper end of the rod has a disc shaped
head n constituting a valve having an annular groove on the under side, and fitting,
in the closed position of the valve, with its annular rim upon a disc o of packing
material fitted in the top surface of the valve. Upon the stem is placed a short
length of tube p between the underside of the valve and the top of the looped
piece m, so that by screwing up the latter to a greater or less extent the play of
the valve on its stem can be varied.