Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1982-05-03
1984-09-11
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 66, G01R 3102
Patent
active
044712936
ABSTRACT:
There is disclosed a cable test unit for use in testing multi-conductor cables containing a plurality of wire pairs. The invention includes means for supplying a constant D.C. voltage; a time-governed oscillator; a recycle pulse generator for releasing sequential pulse outputs; a connector test base having anode and cathode sides; a plurality of LEDs, each corresponding to a respective wire pair, and electrically connected to the test base; means for inhibiting induction across all wire pairs except the pair at which a pulse output from the recycle pulse generator exists; and means for recycling the pulse generator. The current flow characteristic across a given wire pair varies as a function of its structural condition as either a short, open, or crossed circuit, or a loose connection, and such characteristic is reflected in the visual appearance and behavior of the LED corresponding to that wire pair.
REFERENCES:
patent: 4282479 (1981-08-01), Deboo et al.
patent: 4375050 (1983-02-01), Helgerson
Krawczewicz Stanley T.
Silverman M. K.
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