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Apparatus for presetting volumes of liquid

  • US 4,105,138 A
  • Filed: 03/02/1977
  • Issued: 08/08/1978
  • Est. Priority Date: 03/04/1976
  • Status: Expired due to Term
First Claim
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1. Apparatus for metering a quantity of liquid through a line which contains therein a flow meter developing an output signal proportional to flow, means for reducing the flow in the line and means for terminating the flow therein comprising:

  • (a) a first counter having its input coupled to the output of the flow meter;

    (b) means for storing a desired quantity to be metered;

    (c) a first comparator having as inputs the outputs of said first counter and said means for storing;

    (d) a second counter, said second counter also having as an input the output of the flow meter;

    (e) means for presetting a lead value into said second counter;

    (f) a second comparator having as inputs the output of said second counter and the output of said means for storing;

    (g) a first flipflop having as an input the output of said first comparator, said flip-flop providing its output to control the means for terminating flow;

    (h) a second flip-flop having as an input the output of said second comparator and providing its output;

    an to the means for reducing flow; and

    (i) display means having an input coupled to the output of said first counter.

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