3753094 is referenced by 149 patents and cites 3 patents.

An ohmmeter for measuring the internal resistance of a battery by an A.C. method. The output of a DC power circuit is converted into an alternating current of prescribed frequency through a DC - AC conversion circuit. The alternating current flows through a battery by way of a DC blocking device and the voltage drop due to the internal resistance of the battery is introduced into an AC voltmeter circuit. The internal resistance of the battery is indicated at the indicating portion of the AC voltmeter circuit so that it is read directly.

Title
Ohmmeter for measuring the internal resistance of a battery and directly reading the measured resistance value
Application Number
05/274,809
Publication Number
3753094
Application Date
July 24, 1972
Publication Date
August 14, 1973
Inventor
Fukuoka Toshiaki
Iida Yasunobu
Furuishi Haruhisa
Assignee
Matsushita Electric Industrial
IPC
G01n 27/46
G01R 31/36
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