IMPROVEMENTS IN VALVES
Year: 1883

page_text: LETTERS PATENT to Johann Kroog of Halle-on-the-Saale in the Kingdom-
of Prussia and German Empire for an Invention of
VALVES
"
<<
IMPROVEMENTS IN
3
PROVISIONAL SPECIFICATION left by the said Johann Kroog at the Office
of the Commissioners of Patents on the 16th July 1883.
JOHANN KROOG of Halle-on-the-Saale in the Kingdom of Prussia and German
Empire, "IMPROVEMENTS IN VALVES
"
My invention relates to valves, and more particularly to valves used in pumps,
and the object of my said invention is to construct a valve so that its valve-seat
and valve proper or valve-plate will allow of being reversed, the valve-seat being
held in place by means of the lower circumferential surface of a removable valve-
cage, the said valve-cage serving as a guide for the said valve proper and being
held in its place in the valve-box by means of a plate or bar laid and fastened
across the top of the said valve-cage. The said valve proper is rounded off at its
circumference and is guided in the said valve-cage by means of its said
circumference only.
Both the valve-seat and valve proper are symmetrical in relation to a horizontal
plane which cuts their centre of gravity, so that both the said valve and its seat
have two seat-faces each, that is to say, an upper one and an under one, the said
lower or under face of the valve proper always acting together with the upper face
of the valve-seat, while the upper face of the valve and the lower face of its seat
are out of action. In case of the working face of the valve proper and that of the
valve seat being worn out or otherwise injured, this construction allows of simply
reversing these said parts, in order to put the valve into its former good working
order again. As above stated the said valve-seat is held in place by means of the
lower circumferential edge of the removable valve-cage bearing upon it, the said
valve-cage being held down upon it by means of the cross-bar or plate, through the
outer end of which passes a binding screw having a suitable handle the said
binding-screw allowing of pressing the said cross-plate against the top of said
valve-cage. The valve is closed by means of a cover-plate which prevents the
handle of the set-screw from turning, thus holding all the parts of the valve in a
fixed position.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Johann Kroog in the Patent Office on the 15th January 1884.
JOHANN KROOG, of Halle-on-the-Saale in the Kingdom of Prussia and German
Empire " IMPROVEMENTS IN VALVES
"
This invention relates to valves, and more particularly to such valves as are
used in pumps, and the object of the said invention is to construct a valve of this
kind so that both its valve seat and valve proper are provided with duplicate
horizontal seating surfaces and will allow of being reversed. The valve-seat is
held in its place by means of a removable valve-cage which serves as a guide for
the valve and is held in its place in the valve-box by means of a plate or bar
fastened, across the top of the said valve-cage, the valve, which is rounded off at
its circumference, being guided in the said cage at its circumference only.,.
In the accompanying drawing
Figure 1 is a vertical section, showing the improved valve when provided with
a valve-seat of hard material, such as bronze, cast-iron, or other suitable metal
Figure 2 is a horizontal section through the valve-box on the line x x Figure 1.
Figure 3 is a sectional view similar to Figure 1, showing the improved valve
when provided with a valve-seat of soft material such as lead, leather, wood or
the like.
Figure 4 shows the valve cage in section
Figure 5 shows a modified form of the cross-plate or bar whereby the valve-cage.
is held in position, and
દ
Figure 6 shows a modified arrangement of the valve seat for obtaining a
stroke of shorter length.
a indicates the valve-box and c the cover which is fastened upon the box a by
means of the clamping-piece e.
m indicates the valve-seat, o the valve, n the valve-cage, and r the cross-plate or
bar, the latter being provided, near its, outer end, with a hole for the reception of
the binding-screw s which bears against the inner surface of the box a and allows
of being turned by means of the handle u. With its other end the said plate, or
bar enters a slot provided in the inner wall of the box a as shown.
The valve-box a is closed by means of the cover c, a binding screw bearing
against the said cover.and passing through the clamping piece e, the latter catching
around shoulders provided on the valve-box in the usual manner. Within the
valve-box a is arranged the valve seat m, and. upon this seat rests the valve o
which is enclosed and has its stroke limited by the valve-cage n, the said valve o
being guided by the said cage n at its circumference only. The, circumferential
edges of the valve o are properly rounded off in order to prevent the said valve
from sticking in the guiding cage n. The shape of the valve o may be compared
to a plate obtained by cutting away from a sphere properly sized segments on both
sides of the central plane of the said sphere..
The valve-seat m and the valve-cage n are fastened by means of the cross-plate
or bar r, being pressed downwards by turning the binding-screw & by means of
its handle, u. After having thus drawn down the plate or bar r so as to bear upon
the top of the cage n, the handle u is turned parallel with the cover c so that, after
the latter has been fastened as above described, it will be practically impossible
for the component parts of the device to become loose or to shift, as, for instance,
otherwise might occur from shaking, since it will be readily understood that, as
herein constructed, the handle u of the binding screw s. is prevented from turning
by the closed cover c, the plate or bar r being sufficiently elastic to allow of
turning the handle u parallel with the cover o

page_text: Both the valve-seat m and the valve o are made symmetrical in relation to a.
horizontal plane which cuts their centre of gravity, so that both the said valve o
and its seat m have two parallel horizontal seating surfaces cach, that is to say an
upper-one and an under-one, the said lower or under-seating surface of the valve o
always acting together with the upper-seating surface of the valve-seat m, while
the upper seating surface of the said valve o and the lower seating surface of its
said seat m are out of action. Now, in case of the working seating surface of the
valve o and that of the valve-seat m being worn out or otherwise injured, the
herein-described construction allows of readily putting the valve in its former good
working order again by simply reversing the said valve o and its seat m.
The improved valve presents the advantages of both the spherical-valve and the
puppet-valve, that is to say it has the smooth surface of the former, while, as
compared to the latter, it allows of the same ready construction of the seat faces,
and at the same time it obviates the difficulties connected with these said two
classes of valves, that is to say the difficult construction of the spherical-valve and
the "sticking" which as is well known, easily occurs with the puppet-valve.
For the purposes of this invention it is immaterial whether reversible valve-
seats may have been used in combination with reversible valves which are guided
in the middle since such arrangement differs entirely from the reversible valve-
seat having duplicate. horizontal seating surfaces in combination with a reversible
valve having duplicate horizontal seating surfaces, and being guided, so as to be
free to play, by means of its circumference only, the said arrangement substantially
as herein described, constituting a new and essential feature in the construction of
such valves.
Having thus fully described my said invention and the manner of performing
the same,
I wish it understood that I claim
First The combination with the valve-cage n, of the cross-plater having the
binding-screws and handle u, substantially as, and for the purpose, specified
Second The combination of a valve-box a, a cover c therefor, a valve-seat m, a
cage n, a bar r, a screw s for locking the cage in a stationary position, and a
valve o free to play in the cage and guided by the inner surface of the latter only,
substantially as described
Third The combination of the valve-seat m having duplicate horizontal seating
surfaces and capable of being reversed when one surface becomes worn or injured,
with a reversible valve o which is also provided with duplicate horizontal seating
surfaces, substantially as described.
In witness whereof I the said Johann Kroog have hereunto set my hand and
seal this first day of January in the year of our Lord one thousand eight
hundred and eighty four.