Level indicating device

Details Level indicating device Level indicating device

1978-03-14

1981-04-14

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Demand, excess, maximum or minimum

324 96, 324122, 340754, G01R 1904, G01R 1900

Patent

active

042622557

ABSTRACT:
A level indicating device for indicating input signal level purely electrically which includes a plurality of voltage comparators having threshold values set in order in terms of level, and a fluorescent indicator tube incorporating therein a plurality of anode electrodes aligned in a row. The outputs of the voltage comparators are connected to respective anode electrodes, so that when a signal is applied to the voltage comparators, the level of the signal is indicated by the number of the anode electrodes illuminated.

REFERENCES:
patent: 3922666 (1975-11-01), Inami et al.
patent: 4004220 (1977-01-01), Kerber et al.
patent: 4127794 (1978-11-01), Frankland
Santoni, A.; "At a Glance . . . "; Electronics; vol. 49, No. 15, pp. 114-118, Jul. 22, 1976.
Edwards, D.; "LED Level Meters"; Electronics, Australia; Jun. 1976; pp. 48, 49, 125, 51.

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