Teacher-students' intercommunication system
US4050165A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1976 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Feb 20, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B5/08
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.