Portable telephone having removable transducer

Details Portable telephone having removable transducer Portable telephone having removable transducer

1997-07-07

1998-03-03

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 90, 455569, 379422, 379424, 381123, H04B 138

Patent

active

057246670

ABSTRACT:
A portable telephone includes a main body of the telephone, a transducer (preferably an earphone) contained in the main body so that it can be removed therefrom, a cord connecting the transducer and the main body, and a switching mechanism. The portable telephone further comprises transmitting means and a transmission/reception circuit. In one embodiment of the present invention, the switching mechanism switches between an off-hook state and an on-hook state in conjunction with the removing and containing of the transducer from and into the main body of the telephone preferably through the delivery or taking up of the cord from and into the main body of the telephone. In a second embodiment, the portable telephone further includes a hinged lid which is rotatably supported to close an opening provided in the main body. The hinged lid preferably has a protuberance thereon so that when the hinged lid is opened and closed, the projection causes the switching mechanism to place the telephone in an off-hook and on-hook state, respectively.

REFERENCES:
patent: 3824465 (1974-07-01), Blough
patent: 3904843 (1975-09-01), Kendechy
patent: 4845772 (1989-07-01), Metroka

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