H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/15, 325/23
H04B 1/38 (2006.01)
Patent
CA 1076209
COMBINATION MICROPHONE, SPEAKER, AND CONTROL UNIT FOR A RADIO TRANSCEIVER Abstract of the Disclosure A combination microphone, loudspeaker, and control unit is disclosed which is adapted to be coupled by a multi- conductor cable to a radio transceiver which is capable of transmitting and receiving a plurality of radio signals at pre- selected frequencies. A multi-conductor cable is secured to a housing for the unit and is adapted to electrically connect the unit to a radio transceiver. A multi-position switch is mounted in the housing and connected to the cable, with the switch being operable to select individually the preselected frequencies. An electromechanical transducer is mounted in the housing and connected to the cable and operable to convert audible sound wave signals into corresponding audio frequency electrical signals and audio frequency electrical signals into corresponding audible sound wave signals. A transmit/receive switch is mounted on the housing and coupled to the cable and the transducer for selectively enabling the transducer to con- vert audible sound wave signals into corresponding audio fre- quency electrical signals and audio frequency electrical signals into corresponding audible sound wave signals. A volume control is mounted on the housing and coupled to the cable and the trans- ducer for varying the amplitude of the audio frequency elec- trical signals applied to the transducer. -1-
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