Electric lamp and discharge devices: systems – With signal – indicator – or alarm – Electrically operated switch controlling the signal circuit
Reexamination Certificate
2007-06-05
2007-06-05
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
With signal, indicator, or alarm
Electrically operated switch controlling the signal circuit
C340S315000, C375S259000
Reexamination Certificate
active
10481150
ABSTRACT:
The present invention is related to a method and devices for controlling at least one load connected to an AC power line. The method is based on the introduction of interruptions in the line voltage, which correspond to data being sent. The method centers on interruptions of variable length, yielding the opportunity of sending more data with a reduced number of interruptions. The invention is further related to a particular design of the transmitter and receiver. The transmitter is equipped with a means for measuring the line current. The receiver is equipped with a comparator with a feedback connection. The receiver is also capable of increasing momentarily the line current, which creates the possibility of sending information back towards the transmitter.
REFERENCES:
patent: 3594584 (1971-07-01), Woods
patent: 4254403 (1981-03-01), Perez-Cavero et al.
patent: 4408185 (1983-10-01), Rasmussen
patent: 5264823 (1993-11-01), Stevens
patent: 5920253 (1999-07-01), Laine
patent: 0 967 737 (1999-12-01), None
patent: WO 92/06552 (1992-04-01), None
Van Tichelen Paul
Weyen Dominique
Merchant & Gould P.C.
Tran Thuy Vinh
Vlaamse Instelling Voor Technologisch Onderzoek (VITO)
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