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Vehicular charger

  • US 5,200,688 A
  • Filed: 05/31/1991
  • Issued: 04/06/1993
  • Est. Priority Date: 05/31/1991
  • Status: Expired due to Fees
First Claim
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1. A vehicular battery operated charger for charging a battery operated radio having a battery and the vehicular battery having a voltage level, the vehicular battery operated charger comprising;

  • vehicular battery monitoring means for monitoring the voltage level of the vehicular battery;

    control means responsive to said vehicular battery monitoring means, the control means including a storage means for storing first and second threshold voltage levels, the control means further including a comparison means for comparing the vehicular battery voltage level to the first and second threshold voltage levels stored in the storage means and producing a first control signal when the vehicular battery voltage level drops below the first threshold voltage level;

    charging means responsive to the control means for charging the radio battery;

    cut-off means responsive to the control means for automatically discontinuing the charging of the radio battery when the first control signal is produced by the control means;

    annunciator means responsive to the comparison means for annunciating a low battery condition when the vehicular battery voltage level drops below the first threshold level;

    electronic device monitoring means coupled to the control means for monitoring the voltage level of the radio battery; and

    the comparison means compares the radio battery voltage level to an electronic device voltage threshold level which is stored in the storage means, the control means producing a second control signal when the radio battery voltage level is below the electronic device voltage threshold level, and the control means sends a signal to the radio instructing the radio to transmit a low voltage alert signal when the vehicular battery voltage level falls below the second threshold voltage level.

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