Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1976-03-10
1977-06-07
Rolinec, Rudolph V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324122, G01N 2742
Patent
active
040286169
ABSTRACT:
An analyzer is disclosed herein for testing an automobile battery by comparing the battery voltage to a precise reference established by a resistive divider and operational amplifiers. In this unit, digital integrated circuits are employed including eight operational amplifiers and a stable reference voltage source which combine with light emitting diodes to allow the exact condition of any battery to be readily determined.
REFERENCES:
patent: 3356936 (1967-12-01), Smith
patent: 3778702 (1973-12-01), Finger
patent: 3781658 (1973-12-01), Godshalk
patent: 3796951 (1974-03-01), Joseph
patent: 3940679 (1976-02-01), Brandwein
Fritz, Indicating Lamp System for Diagnostic Measurement, IBM Tech. Disc. Bull., vol. 16, No. 9, Feb. 1964, pp. 2841, 2842.
Marrs Roger A.
Rolinec Rudolph V.
Tokar Michael J.
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