Patent
1977-08-02
1978-09-26
Olms, Douglas W.
357 80, H04Q 100
Patent
active
041172647
ABSTRACT:
A device for testing the tip-ring polarity of telephone jacks includes a battery and an LED, the device being capable of being plugged into a jack. When a diode is placed across the jack, the LED will light if the final terminals of the jack are wired with the correct tip-ring polarity. The disclosure teaches that the diode may be incorporated in various types of packages and may be connected across the jack in several different ways.
REFERENCES:
patent: 3662230 (1972-05-01), Redwantz
patent: 3736379 (1973-05-01), Kagan
Charles Joseph T.
Ryan James P.
Coil Sales & Manufacturing Company
Olms Douglas W.
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