Teacher-students' intercommunication system

Details Teacher-students' intercommunication system Teacher-students' intercommunication system

1976-02-20

1977-09-27

Grieb, William H.

35 35C, 179 1H, 179 1MN, G09B 500

Patent

active

040501655

ABSTRACT:
An intercommunication system in a group teaching or training system in which a teacher station and a plurality of student stations are interconnected with a common outgoing line and a common incoming line, and each station includes a transmitter and a receiver, and wherein the teacher station includes a switching circuit for selectively connecting the incoming line to the outgoing line, the transmitter and receiver in each student station are selectively connected through switching circuits to the incoming and outgoing lines, respectively, and the switching circuits in each student station may be selected in synchronism with the timing with which the teacher station sequentially scans the student station.

REFERENCES:
patent: 3177594 (1965-04-01), Demo
patent: 3200516 (1965-08-01), Parker
patent: 4004354 (1977-01-01), Yamauchi

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