Passive, solid state wide range voltage checker

Details Passive, solid state wide range voltage checker Passive, solid state wide range voltage checker

1975-10-01

1977-05-24

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonquantitative

324119, 324132, G01R 1914, G01R 1916

Patent

active

040258505

ABSTRACT:
A checker for a.c. and d.c. voltages in the range of 3 to 250 or more volts in which a single light emitting diode serves as an indicator for all voltages and the current through the light emitting diode is controlled by a transistor and a zener diode. The tester indicates a.c. or d.c. and polarity of d.c. voltages.

REFERENCES:
patent: 2575821 (1951-11-01), Linton
patent: 2921264 (1960-01-01), Sundt
patent: 2956229 (1960-10-01), Henel
patent: 2994039 (1961-07-01), Parke
patent: 3157870 (1964-11-01), Marino et al.
patent: 3281816 (1966-10-01), Raymond
patent: 3355729 (1967-11-01), Dayson
patent: 3531790 (1970-09-01), Staley
patent: 3534354 (1970-10-01), Galginaitis
patent: 3694749 (1972-09-01), Woroble
patent: 3771049 (1973-11-01), Piccione
patent: 3784903 (1974-01-01), Thomas
patent: 3878459 (1975-04-01), Hanna
patent: 3934195 (1976-01-01), Shires

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