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DIGITAL MULTIGAGE FOR MOTOR VEHICLE

  • US 3,866,166 A
  • Filed: 04/09/1974
  • Issued: 02/11/1975
  • Est. Priority Date: 04/09/1974
  • Status: Expired due to Term
First Claim
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1. Motor vehicle condition monitoring apparatus comprising:

  • timer means, including a plurality of selectively connectable variable resistance sensor means, for establishing when enabled a time interval related to the status of the sensor selected, oscillator means, including a plurality of selectively connectable calibrating resistor means, for producing an output signal at a frequency dependent on the calibrating resistor means selected, each calibrating resistor means being associated with a sensor means so that a particular calibrating resistor means is selected in conjunction with a particular sensor means, counter means adapted when enabled to be clocked from said oscillator means, display means adapted when enabled to display the digital value of the count stored in said counter means, counter and display control means responsive to selection of each of said sensor means for enabling said timer means and said counter means and for disabling said display means, said control means responsive to the termination of said time interval for enabling said display means and for disabling said counter means, automatic selection means for periodically selecting one of said sensor means and the associated frequency output of said oscillator means, cycle selection means for sequentially selecting each of said sensor means and the associated frequency output of said oscillator means, individual selection means for selecting other than said one of said sensor means and the associated frequency output of said oscillator means.

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