Improved Discharge Valve.
Year: 1899

page_text: Date of Application, 27th June, 1899
Complete Specification Left, 9th Mar., 1900-A ooepted, 27th June, 1900
Improved Discharge Valve.
I, JOSEF HERCHENBACII, of No. 5, Graf Adolf Strasse, Dusseldorf, Germany,
do hereby declare the nature of this invention to be as follows:-
The object of the present invention is a discharge valve which after once raising
remains standing open, but after repeated raising closes itself again.
This result is obtained by means of the following construction:-
The valve casing has either above or below a cylindrical shaft arranged axially
which passes through a guide in the valve seating. In this guide there is a
stop or pin projecting inwards which is preferably formed of a screw inserted
from the outside in the lower part of the valve seating. The cylindrical shaft of
the valve casing is guided by the internal projection aforesaid and on the outer
surface of said shaft is cut a curve into which the end of the said pin fits. This
curve forms a closed ring and is heart-shaped with the apex uppermost. From
the said apex of the ring one of the lines leads downwards diagonally and it then
turns towards the side so that on releasing the valve the projection in the valve
seating does not turn back the same way but engages behind a corner which diverts
it sideways. The then ascending branch of the track is very short in proportion
to the descending one just described so that the valve is raised about the difference
between the two branches. If the valve is repeatedly raised the projection in
the valve seating will again turn from its previous course so that by letting go
the valve the projection travels back over the other part of the ring to its initial
position and the valve casing falls into its seating.
271
1
1000
Improved 5
I, JOSEF HERCHENBACH, of No. 5, Graf Adolf Strasse, Dusseldorf, Germany,
Engineer, 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:-
The present invention relates to a means for the convenient opening and
shutting of delivery valves as a single pull at the valve cone suffices to open it
and keep it open, while a second pull closes the valve again.
Referring to the accompanying drawings:
Figure I shews a vertical section of the valve cone and valve casing.
Figure II shews a developed view of the guiding groove.

page_text: As will be seen from Figure 1 the valve cone B has the peg shaped prolonga-
tion which passes through the bottom of the valve casing c. This prolonga-
tion is provided on its casing side with a curved guiding groove A (Figure 2)
in which works the pin d at the end of the screw e, the latter being screwed
into the casing c. If the valve cone is pulled up the pin d must follow the
prescribed course through the curved groove.
At the first pull the valve cone rises until the pin d reaches the lowest place 7
of the curved branch and on letting go it remains suspended on the end of the
branch at m; and at this point the valve cannot close automatically.
At the second pull the valve cone follows the continuation of the groove
until the pin d reaches the lowest part of the branch k, and on letting go the
valve cone it falls back to the original position at f and the valve is closed again.
This cycle is repeated, that is by continually pulling the valve cone the valve
alternately opens and shuts.
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:-
-
A delivery valve characterized by the arrangement of a groove on the prolonga-
tion of the valve cone, said groove being so formed that when the valve cone
rises the first time the pin d engaging in the groove stops at and then to
prevent the valve closing stops at , and when the valve cone rises a second
time said pins slips to and then allows the valve to close.
Dated this 8th day of March 1900.
W. P. THOMPSON & Co.,
Of London, Liverpool, Manchester and Birmingham.