Appeal No. 96-3854
Application No. 08/027,872
apparatus includes a collecting and measuring container 4
having an inlet conduit 15, a supporting screen member 13 on
which a measuring filter 11 is mounted, an opening 14 below
the screen, a filling pipe 10 which in turn extends lengthwise
of the measuring container 4 into the vicinity of the outlet
end 9 and an outlet valve 5. The apparatus further comprises
an inlet valve 1 which controls the intake of measuring liquid
into a pressure chamber 3 through inlet conduit 15, and a
pressure control means 2 for controlling the pressure of
liquid supplied to the chamber 3. The inlet valve 1 and the
outlet valve 5 are controlled by a time control circuit 6
which is responsive to a vertically adjustable
level detector or switching means 8. The switch 8 is arranged
to respond when it detects a given level and thus a given
volume of liquid in the container 4. The apparatus further
comprises a time measuring circuit 7 connected to the level
switch 8 and operable to measure the period of time which is
required for the container 4 to be filled with a given volume
of liquid preset by the positioning of the switch 8. The
measuring filter 11 may be in the form of a membrane filter
strip or band which is passed from a supply or storage reel 18
7
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Last modified: November 3, 2007