Improvements in Valves for Hydrants and the like.
Year: 1895

page_text: Date of Application, 23rd Sept., 1895-Accepted, 26th Oct., 1895
COMPLETE SPECIFICATION.
Improvements in Valves for Hydrants and the like.
I, HEINRICH PICHLER of 28-30 Fichardstrasse Frankfurt a Main, in the
Empire of Germany, Engineer, do hereby declare the nature of this invention and
what manner the same is to be performed to be particularly described and
scertained in and by the following statement :-
This invention relates to a valve for hydrants, fountains and the like.
In the accompanying drawing which illustrates this valve applied to a hydrant:
A designates the ascending or delivery pipe; B the lower part serving as a
oundation or pedestal; C the opening in the foundation or pedestal to serve for
onnecting the hydrant with the service pipe or main; D the opening for the
lischarge of the water which remains in the delivery pipe A after the valve is
closed; E the spindle rod for rotating the valve, the said rod being carried up
nd mounted in the pipe A in the usual manner.
The valve proper is built into the pipe A and lower part B in the following
manner: The valve a is situated in the valve casing b which is made in two
parts, and
This
closed at the bottom by means of a perforated part such as c.
part is screwed tight into the casing b, and bears upon the projections d in the
lower part B and also upon the upper edge of the discharge pipe D. The valve
casing is pressed by means of the screw threaded annular nut e tightly upon
these supports or upon packing rings or washers ƒ and g interposed between
them. The valve casing 6 carries at its upper part a nut in which the valve
spindle i works. On rotating this spindle the valve a is caused to rise and fall, the
spindle being rigidly connected to the spindle rod E.
In the accompanying drawing the valve is shown open. The lower end of the
spindle in constructed in the form of a piston o which comprises a metal dish-
shaped plate with a leather disc of the same size, a washer and a fixing screw. This
piston o fits accurately in a cylindrical space w in the upper part of the valve a.
If it is desired to close the valve, the spindle i is rotated whereon it rises, and in
consequence of the tight fit of the piston o in the cylindrical space w in the upper
part of the valve the valve a is lifted and providing there exists in the spaces B
and A a pressure which is greater than the pressure of the atmosphere the valve a
will follow the course of the spindle i until its edge strikes against the edge m of
the valve opening n. On further rotation the spindle only moves upwards which
causes the piston o of the spindle to uncover the hole p in the valve a and thus
establish communication between the pipe A and the discharge aperture D. The
with the
discharge pipe q which is fitted tight in the valve a, connects the hole
discharge pipe b. In the upper part of the valve a are passages such as r which
are so shaped, as is also the upper part of the valve casing b, that any water that
may remain in the ascending pipe A after the valve is closed, will run off to the
very last drop, thus preventing the freezing in of the valve in the winter time.
The discharge pipe q is made tight in the discharge pipe D by means of the cup
leather g; suitable passages s, s, being formed in the part c to enable the water to
exert its packing action upon the said cup-leather.
P
The closing of the valve opening n by means of the valve a is effected in the
following manner :-The valve opening begins at t and tapers in an upward
5 direction and the outer edge of the valve a at is bevelled so that as the two parts
approach each other the cross sectional area of the opening is gradually reduced

page_text: until the parts I and m meet. The tightness against leakage is effected so far only
by means of the simple contact of the metal surfaces and m. This "hard"
joint is supplemented by a second joint which consists of a lip such as made of
rubber or leather which bears against the edge of the valve opening and is firmly
pressed against it by the pressure of the water. The lipped ring u is screwed into
and made tight in the valve body a by means of the upper part which contains the
passages r.
In order to open the closed valve, the operation is as follows:--On rotating
the spindle by means of the spindle rod E, the spindle moves down without the
valve a-which remains closed by reason of the pressure of the water in the
space B-until the piston o of the spindle strikes against the bottom of the hole to
in the valve a and thus closes the hole p, when the valve follows the downward
movement of the spindle and thus opens the valve opening.
The gradual establishing of the full cross sectional area of the valve opening
takes place in the reverse manner to that when closing the valve.
With the object of preventing damage to the lip z the pushing off from the
bearing of the valve seating is effected by means of the edge of the upper
part of the valve, which is constructed as a cushion.
The arrangement of the valve and the construction of the casing are such that
all the requisite parts can be taken out of the hydrant without the necessity.of
removing it from the ground or of taking it to pieces, it being sufficient to rotate
the screw-threaded ring e by means of a suitable tool. All the parts can then be
taken out with the help of the spindle-rod E.
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 :-
(1.) A valve for hydrants and the like arranged in a casing in the manner
herein before set forth to allow of its being removed from and replaced in the
'hydrant without removing the hydrant from the ground, or of taking it to pieces,
as set forth.
(2.) In a valve as specified in Claim 1, a closing device consisting essentially
of a "hard" joint which receives the first shock of the water, and of a flexible
joint adapted to be tightly closed by the pressure of the water itself, as set
forth.
(3.) In a valve as specified in Claims 1 and 2, the specific construction of valve
as herein before described whereby the water that remains on top of the valve after
it is closed can drain off, as and for the purpose set forth.
(4.) The combination of parts herein before described and illustrated by the
accompanying drawing forming my improved valve for hydrants and the like."
Dated this 23rd day of September 1999.
BORE COTU May of September 1895.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Associate Agent.