Telecommunications – Transmitter and receiver at same station – Convertible
Patent
1988-10-03
1990-05-01
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at same station
Convertible
455344, 379100, 358434, H04B 140, H04N 132
Patent
active
049225464
ABSTRACT:
A radio facsimile interface unit is connected between a radio set provided with a speaker and a facsimile machine and also connected to a microphone stand provided with a microphone and a manually operable transmission switch. The interface unit is so structured to allow the radio set to carry out an ordinary audio communication using the speaker and the microphone. The radio set is normally set in a reception mode and the transmission switch is depressed only when audio information is to be transmitted. The interface unit is provided with a relay between the microphone and the radio set and the relay is disconnected when the facsimile is in a transmission mode, so that facsimile communication is given a higher priority than audio communication.
REFERENCES:
patent: 3586778 (1971-06-01), Riethmeier et al.
patent: 4055729 (1977-10-01), Vandling
patent: 4551854 (1985-11-01), Rutty et al.
patent: 4578537 (1986-03-01), Faggin et al.
patent: 4716576 (1987-12-01), Sakai et al.
patent: 4809297 (1989-02-01), Polansky et al.
"Communications for Air Defense Systems", Trill et al., 6/76, all.
Horiki Masanao
Takahashi Shuichi
Yamanaka Kunihiro
Eisenzopf Reinhard J.
Kuntz Curtis
Marantz Japan Inc.
Ricoh & Company, Ltd.
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