Power line control system
September 26, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3573384 3646439 Method and apparatus, for power line communications using zero crossing load interruption Remote AC power control with control pulses at the zero crossing of the AC wave Switch device for connecting AC power source to load Modulation installation for sector supply of charge elements Apparatus for mutual information transmission in a lock and key system Neighborhood home security system AC power line signaling system Security control system InventorsApplicationNo. 534090 filed on 09/26/1995US Classes:323/207, Using converter307/140, Power circuit controlled340/2.4, Code or pulse responsive340/825.57Pulse responsive actuationExaminersPrimary: Wong, Peter S.Assistant: Berhane, Adolf Attorney, Agent or FirmInternational ClassesG05F 001/70H04Q 001/00 H03K 017/60 AbstractThe present invention provides a system and a method for controlling electrical devices connected to an AC power line by means of control signals transmitted over the AC power line. The control system consists of a transmitter apparatus and a receiver apparatus. The transmitter apparatus generates, and transmits via an AC power line, multiple voltage pulses during any one-half cycle of the AC power line voltage. The multiple voltage pulses act as control signals for any electrical device that is sought to be controlled, or a "slave" device. The receiver apparatus is simultaneously coupled to the slave device and the AC power line for receiving and, if necessary, decoding the voltage pulses sent by the transmitter apparatus. The receiver apparatus in turn generates a command signal that controls the slave device's operation.Other References
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