Telegraphy – Systems – Line-clearing and circuit maintenance
Patent
1976-03-02
1977-08-30
Robinson, Thomas A.
Telegraphy
Systems
Line-clearing and circuit maintenance
178 531R, H03K 117, H04B 116
Patent
active
040456145
ABSTRACT:
A system for controlling teletype signals, in which a start-stop telegraph signal train may be received at the reversed polarity state. The polarity of a signal element of a received character is decided at a specified instant in a time slot at which the stop element of the received character is expected to arrive. The polarity of a signal element of the received character is again decided in a time slot at which a stop element after a predetermined number of characters from the specified instant is expected to arrive. Only when the polarities of the signal elements of the received characters are decided as the same A-polarity during both of the decision operations, the polarity of the telegraph signal train is automatically reversed.
REFERENCES:
patent: 3156767 (1964-11-01), Van Duuren et al.
patent: 3419679 (1968-12-01), Elvis et al.
patent: 3678200 (1972-07-01), Clark
patent: 3916324 (1975-10-01), Shuda
Hirata Yasuo
Takahashi Toshio
Takahata Fumio
Adams Bruce L.
Burns Robert E.
Kokusai Denshin Denwa Kabushiki Kaisha
Lobato Emmanuel J.
Robinson Thomas A.
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