H - Electricity – 04 – B
Patent
H - Electricity
04
B
340/79
H04B 3/54 (2006.01)
Patent
CA 1195746
ABSTRACT OF THE DISCLOSURE A transmitter connected to any phase of a 3-phase alter- nating current transmits a data subsequent to a lock signal in synchronism with the cycles of the phase. A receiver connected to any phase of the 3-phase alternating current receives the lock signal in synchronism with the cycles of the phase. The receiver receives a data after the receiver is synchronized with the transmitter using a lock signal. The synchronized relationship is maintained or locked until a data transmission subsequent to a lock signal is terminat- ed. The lock is released upon detection of an end signal added to the last portion of a data or a non-busy signal interval. In case where a data transmission is repeated a plurality of times, a set of signal comprising a lock sig- nal and a data is repeatedly sent out interleaving a non- busy signal interval.
412703
Fukagawa Hitoshi
Komoda Yoshiyuki
Suzuki Yoshiharu
Tanaka Osamu
G. Ronald Bell & Associates
Matsushita Electric Works Ltd.
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