Telephone line testing unit
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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2 Claims
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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.
- A CASING INCLUDING AN INLET JACK AND AN OUTLET PLUG;
Specification