Hand-held microphone for transceiver

Details Hand-held microphone for transceiver Hand-held microphone for transceiver

1977-10-19

1980-04-22

Griffin, Robert L.

Telecommunications

Transmitter and receiver at same station

With tuning

179179, H04B 140

Patent

active

041997212

ABSTRACT:
Hand-held microphone consisting of a housing which is of such a size that said housing can be easily held by one hand, said housing including a rotary switch means which generates a digital coded signal for individually selecting one of preset frequencies and a digital coded signal for making a digital display of the channel member corresponding to the selected frequency; a channel number display means which is driven by the digital coded signal from said rotary switch means and makes a digital display of the channel number corresponding to the selected frequency; an electroacoustic transducer means; a transmit/receive switch means which switches between transmitting condition and receiving condition of a transceiver and at the same time actuates said electroacoustic transducer means; and a gain control means which varies the amplification degree of the audio amplifier and/or the radio frequency amplifier in the transceiver, whereby transmission or reception can be made by the operator who handles the transceiver in one hand.

REFERENCES:
patent: 4032844 (1977-06-01), Imazeki
patent: 4132950 (1979-01-01), Cochran et al.
SBE Touch/Com, Popular Electronics Jun., 76.
Hy-Gain Advertisement, Motor Trend Dec. 1976.

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