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Indicating system

  • US 4,574,276 A
  • Filed: 03/08/1983
  • Issued: 03/04/1986
  • Est. Priority Date: 04/16/1982
  • Status: Expired due to Fees
First Claim
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1. An indicating system comprising:

  • (a) a first voltage comparator having a first input terminal connected to receive a first reference voltage and a second input terminal connected to receive a control signal;

    (b) a second voltage comparator having a first input terminal connected to receive a second reference voltage and a second input terminal connected to receive said control signal;

    (c) first output circuit means having an input terminal connected to an output terminal of said first voltage comparator for producing a current of a first polarity at a common output terminal when the voltage level of said control signal is higher than said first reference voltage;

    (d) second output circuit means having an input terminal connected to an output terminal of said second voltage comparator for producing a current of a second polarity at said common output terminal when the voltage level of said control signal is lower than said second reference voltage;

    (e) a first indicating device having a unidirectional current characteristic, one end of which is connected to said common output terminal so as to allow the current of the first polarity to flow therethrough and to prevent the current of the second polarity from flowing therethrough; and

    (f) a second indicating device having a unidirectional current characteristic, one end of which is connected to said common output terminal so as to allow the current of the second polarity to flow therethrough and to prevent the current of the first polarity from flowing therethrough.

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