Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1991-01-16
1993-12-28
Nguyen, Vinh
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
324126, 324133, G01R 1916
Patent
active
052743241
ABSTRACT:
A hot line indicator for instantaneously indicating the presence of voltage on an electrical conductor in an AC power distribution system includes a unitary one-piece housing having a projecting metallic probe and a hookeye for engaging a conventional lineman's hot stick. Within the housing, the display electrodes of a high impedance liquid crystal display component are coupled to the monitored conductor through the probe and a capacitive coupling to ground to provide an unambiguous "HL" display indicative of the presence of voltage on the conductor.
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"Liquid Crystal Display", a publication of Hamlin Inc., Lake and Grove Streets, Lake Mills, Wisconsin, circa Jun. 1, 1989.
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