Apparatus for presetting volumes of liquid
First Claim
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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Accused Products
Abstract
An apparatus to provide control signals to a line containing a regulating valve for metering predetermined amounts of liquid in which the output of a flow meter is converted to a frequency, the frequency counted in two counters, one of which has been preset with a lead, and the outputs of the counters compared in comparators with a predetermined desired liquid volume, the comparator outputs being used respectively to reduce the flow and then eventually terminate the flow, the reduction and final termination giving a fine metering at the end of the cycle of operation.
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Citations
7 Claims
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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:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification