Audible voltage-impedance tester

Details Audible voltage-impedance tester Audible voltage-impedance tester

1977-12-14

1979-07-03

Strecker, Gerard R.

Electricity: measuring and testing

Plural, automatically sequential tests

324 51, 324 62, 324133, G01R 1512, G01R 1916, G01R 2700, G01R 3102

Patent

active

041602064

ABSTRACT:
An audible voltage-impedance tester for generating distinct sounds when its test probes are connected across an unknown source, be it a resistive source, a DC voltage source, an AC voltage source or combination thereof. No switching is required between resistive testing and voltage testing nor between DC voltage testing and AC voltage testing. The tester is able to generate distinct sounds for different resistance values, for different DC voltage amplitudes, for different AC voltages with the same frequency but different amplitudes, and for AC voltages with different frequencies but the same amplitudes.
A visual indicator of the audible sound is disclosed along with circuitry that utilizes a multi-vibrator whose powered operation by a battery is not affected by the unknown source.

REFERENCES:
patent: 3529237 (1970-09-01), Kilchhofer
patent: 3872384 (1975-03-01), Laass
patent: 3911360 (1975-10-01), Kimzey
patent: 3962630 (1976-06-01), Chaffee
patent: 4015201 (1977-03-01), Chaffee
Loiselle, J. T., Low-Voltage and Current Continuity Tester, IBM Tech. Discl. Bull., vol. 12, No. 7, Dec. 1969, p. 926.

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