Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Nonquantitative
Patent
1979-12-26
1982-09-21
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Nonquantitative
324120, G01R 1900, G01R 19165
Patent
active
043509517
ABSTRACT:
Disclosed is an analog voltmeter which generates audible tones whose frequency is representative of the analog voltage being measured. Since voltage levels are detected through the sense of hearing, a user is not required to direct his visual attention to "read" the meter; but instead he can use his visual attention to place the meter's probe onto various nodes whose voltage is to be measured. Using the audio analog voltmeter on a five volt scale, frequency differences in the tone corresponding to 17 mv changes in the measured voltage are detectable.
REFERENCES:
patent: 3009099 (1961-11-01), Muller
patent: 3742351 (1973-06-01), Palmer et al.
patent: 3786468 (1974-01-01), Moffitt
patent: 3794916 (1974-02-01), Ritzenthaler
patent: 3872384 (1975-03-01), Laass
patent: 4160206 (1979-07-01), Bojarski
patent: 4163937 (1979-08-01), Laass
Majithia et al., Design of an Audio Logic Tester, IEEE Transactions on Instr. and Meas., vol. 1M-22, No. 1, Mar. 1973, pp. 95-97.
Hyan, J. T., An Acoustic Digital Tester in Probe Form, Funkschau, vol. 47, No. 15, p. 66, Jul. 18, 1975.
Butler, T. K., Low-Priced Logic Probe Indicates Levels with Tones, Electronics, vol. 48, No. 18, p. 118, Sep. 4, 1975.
Burmeister, H. G., Logic Probe Generates Square-Wave Test Pulses, EDN, vol. 22, No. 14, Aug. 5, 1977, p. 52.
Burroughs Corporation
Fassbender Charles J.
Peterson Kevin R.
Strecker Gerard R.
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