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Telephone line testing unit

  • US 3,350,515 A
  • Filed: 07/06/1964
  • Issued: 10/31/1967
  • Est. Priority Date: 07/06/1964
  • Status: Expired due to Term
First Claim
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2. A TELEPHONE LINE TESTING UNIT COMPRISING, IN COMBINATION:

  • A CASING INCLUDING AN INLET JACK AND AN OUTLET PLUG;

    TIP, RING, AND SLEEVE CONDUCTORS CONNECTING SAID INLET JACK TO SAID OUTLET PLUG;

    A SLIDE SWITCH CONNECTED TO SAID RING CONDUCTOR AND HAVING REAR AND FORWARD CONTACTS;

    A LIGHT BULB;

    CONTACT MEANS NORMALLY CONNECTING ONE SIDE OF SAID LIGHT BULB TO SAID TIP CONDUCTOR AND ADAPTED TO BREAK ITS CONNECTION THERETO IN RESPONSE TO INSERTION OF A PLUG INTO SAID JACK, THE OTHER SIDE OF SAID LIGHT BULB CONNECTING TO SAID REAR CONTACT;

    A PUSH BUTTON SWITCH CONNECTED BETWEEN SAID SLEEVE CONDUCTOR AND SAID REAR CON TACT;

    AND A SERIES CIRCUIT INCLUDING A RESISTANCE AND CONDENSER CONNECTED BETWEEN SAID PUSH BUTTON SWITCH AND SAID FORWARD CONTACT.

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