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Signal generator for a fluid-level indicator

  • US 4,144,521 A
  • Filed: 01/09/1978
  • Issued: 03/13/1979
  • Est. Priority Date: 01/15/1977
  • Status: Expired due to Term
First Claim
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1. A signal generator for a fluid-level indicator in a motor vehicle to monitor the fuel level in a fuel tank of said vehicle, said vehicle including an instrument panel having mounted thereon an illuminable display device, said display device comprising a plurality of illuminable display panels, each of which carries a visible inscription and is illuminable by a respective electrically-energizable light means, said fluid-level indicator including float means suspended in the fuel of said fuel tank, lever transmission means connected to said float means, and a pivot connected to said lever transmission means in such a manner that movement of the float means in response to changes in the fuel level produces corresponding pivotal movement of said pivot, said signal generator comprising digital binary coding means mechanically connectable to said pivot so as to transform the pivotal movement thereof into corresponding digital binary coded signals, and an integrated switching circuit for receiving said corresponding digital binary coded signals as inputs thereto, said switching circuit having a plurality of outputs therefrom, each one of which is connectable to a respective one of said respective energizable light means, each one of said outputs being enabled in sequence by the serial changes in the digital binary coded signals produced by the pivotal movement of said pivot through a predetermined angle corresponding to the movement of the float means produced by the change in fuel level between a predetermined minimum level and a predetermined maximum level.

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