Communications: electrical – Systems – Selsyn type
Patent
1987-03-17
1988-08-09
Crosland, Donnie L.
Communications: electrical
Systems
Selsyn type
340310A, 340538, 34082503, 340827, 375 37, 379221, 333 14, H04M 1104
Patent
active
047631040
ABSTRACT:
A gateway circuit which exchanges information between a leased-line information transmission system and a power line carrier information transmission system includes a control circuit which receives and formats information transmitted over the leased-line information system and a separate control circuit which receives and formats information received over the power line carrier system. The formatted information is provided to a third control circuit which buffers the information and converts between the leased-line format and the power line carrier format to enable signal exchange between the two information transmission systems. The general control circuit responds to load control commands generated by manual switches located on the control unit and to load control commands forwarded over the leased-line system. The general control unit also contains storage elements which maintain the operating state of electrical loads on the power line and only transmit control information when an operating state must be changed.
REFERENCES:
patent: 4114150 (1978-09-01), Yamazaki et al.
patent: 4470093 (1984-09-01), Yamaura
Japanese Patent Public Disclosure No. 149242/85 Official Gazette, Applicant-Matsushia Electric Works, ltd., Inventor Hiroshi Hatano, Aug. 6, 1985, entitled "Information Transmission System".
Entitled, "Interim Report of Investigation by the Power-Line Carrier Communication Investigation Committee, published in Mar. 1985, edited by the Power-Line Carrier communication Investigation Committee of the Electric Wave Engineering Asso. Foundation.
Entitled, "A Multifunction Home Control System", by Edward Bruggeman, Honeywell Inc., 1982 IEEE International Conference on Consumer Electronics Digest of Technical Paper, pp. 154-155.
Inoue Masahiro
Kushiro Noriyuki
Minagawa Yoshiji
Yoshikawa Rieko
Crosland Donnie L.
Mitsubishi Denki & Kabushiki Kaisha
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