Electronic battery testing device

  • US 3,873,911 A
  • Filed: 02/22/1973
  • Issued: 03/25/1975
  • Est. Priority Date: 09/14/1971
  • Status: Expired due to Term
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A measuring device for assessing the condition of a direct current source of electricity comprIsing:

  • a. means providing a time-varying signal;

    b. electrical connecting means constructed and arranged to be connected to each output terminal of said direct current source of electricity, each of said connecting means containing both a first conductor and a second conductor separately contacting each of said terminals, said first and second conductors reducing the effects of contact and lead-wire resistance;

    c. electrical means for applying a time-varying current derived from said time-varying signal through said direct current source of electricity by means of a pair of said first conductors, for sensing the resultant time-varying potential across said direct current source of electricity by means of a pair of said first conductors, for sensing the resultant timevarying potential across said direct current source of electricity by means of a pair of said second conductors, and for utilizing said time-varying potential to determine the reciprocal of the dynamic resistance of said direct current source of electricity at frequencies such that the reactive component of the ac impedance of said direct current source is substantially small in comparison with the resistive component of same;

    d. and indicating means connected to said electrical means including pointer means and scale means, the position of said pointer means relative to said scale means during measurement being substantially proportional to the reciprocal of the dynamic resistance of said direct current source of electricity, said scale means subsequently relating said relative position to the condition of said direct current source of electricity.

View all claims
  • 0 Assignments
    ×
    ×

    Thank you for your feedback

    ×
    ×