Proximity operated loudspeaking telephone
First Claim
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6. IN A TELEPHONE SYSTEM INCLUDING A CENTRAL OFFICE, A SUBSCRIBER SUBSTATION AND A TELEPHONE LINE EXTENDING BETWEEN SAID CENTRAL OFFICE AND SAID SUBSTATION;
- SAID SUBSTATION INCLUDING;
SIGNAL RECEIVING MEANS CONNECTED TO SAID TELEPHONE LINE OPERATED IN RESPONSE TO THE APPLICATION OF RINGING CURRENT TO SAID TELEPHONE LINE AT SAID CENTRAL OFFICE TO SIGNAL THE SUBSCRIBER;
A LOUDSPEAKING TELEPHONE;
A PROXIMITY SWITCH COMPRISING AN OSCILLATOR, A TRIGGER CIRCUIT, A CAPACITANCE BRIDGE COUPLING SAID OSCILLATOR TO SAID TRIGGER CIRCUIT OPERATED IN RESPONSE TO THE INTRODUC-
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6 Claims
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6. IN A TELEPHONE SYSTEM INCLUDING A CENTRAL OFFICE, A SUBSCRIBER SUBSTATION AND A TELEPHONE LINE EXTENDING BETWEEN SAID CENTRAL OFFICE AND SAID SUBSTATION;
- SAID SUBSTATION INCLUDING;
SIGNAL RECEIVING MEANS CONNECTED TO SAID TELEPHONE LINE OPERATED IN RESPONSE TO THE APPLICATION OF RINGING CURRENT TO SAID TELEPHONE LINE AT SAID CENTRAL OFFICE TO SIGNAL THE SUBSCRIBER;
A LOUDSPEAKING TELEPHONE;
A PROXIMITY SWITCH COMPRISING AN OSCILLATOR, A TRIGGER CIRCUIT, A CAPACITANCE BRIDGE COUPLING SAID OSCILLATOR TO SAID TRIGGER CIRCUIT OPERATED IN RESPONSE TO THE INTRODUC-
- SAID SUBSTATION INCLUDING;
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Current AssigneeRobert V. Burns
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Original AssigneeRobert V. Burns
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InventorsBurns, Robert V.
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Application NumberUS04/080,259Time in Patent Office1,036 DaysField of SearchUS Class Current379/252CPC Class CodesH03K 17/955 using a capacitive detectorH04M 1/6033 for providing handsfree use...
