Teacher-students' intercommunication system
AssigneeRicoh Company, Ltd.
InventorsSatoshi Yamauchi, Shigeru Yamazaki
Life of this patent
Estimating the term…
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.
Claims11
In an intercommunication system in which a teacher station and a plurality of student stations are interconnected with a common outgoing line and a common incoming line, the improvement wherein said teacher and student stations comprise:
- a transmitter and a receiver, the transmitter and receiver in said teacher station being respectively connected to said outgoing line and said incoming line;
- first switching circuit means in said teacher station for selectively connecting said incoming line to said outgoing line;
- second switching circuit means in each student station for selectively connecting the corresponding receiver and transmitter respectively to said outgoing and incoming lines;
- means in each student station for selectively controlling the corresponding second switching circuit means;
- and
- means in said teacher station for selectively controlling all of said second switching circuit means.
In an intercommunication system in which a teacher station and a plurality of student stations are interconnected with a plurality of pairs of outgoing and incoming lines, the improvement wherein said teacher and student stations comprise:
- a transmitter and a receiver, the transmitter and receiver in said teacher station being respectively connected to said outgoing lines and said incoming lines;
- first switching circuit means in said teacher station for connecting all of the incoming lines to all of said outgoing lines;
- second switching circuit means in said teacher station for selectively connecting the incoming line to the outgoing line in each pair;
- third switching circuit means in each student station for selectively connecting the corresponding receiver and transmitter respectively to the corresponding outgoing and incoming lines;
- means in each student station for selectively controlling the corresponding third switching circuit means;
- and
- means in said teacher station for selectively controlling said third switching circuit means in all of said student stations.
Dependencies are inferred from the claim text.