×

Electronic multiple device control system

  • US 4,163,218 A
  • Filed: 09/13/1976
  • Issued: 07/31/1979
  • Est. Priority Date: 09/13/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. An electronic control system for controlling the operation of a plurality of electrical devices which are energized from AC power lines, said control system comprising:

  • (a) a single central unit connected to the power lines and including;

    (1) central transceiver means for transmitting an encoded oscillating signal of one frequency onto the power lines;

    (2) central encoding means for encoding said oscillating signal with an encoded signal in synchronization with the frequency of the AC power for selective control of electrical devices;

    (3) central control means connected to said encoding means for selecting the electrical device to be controlled and its desired state;

    (b) unitary switch units respectively interconnected between power lines and each electrical device being operative for both local and centralized control of the electrical device with the local control and the centralized control placing the electrical device in respective opposite states from each other, each switch unit including;

    (4) switch transceiver means for receiving the encoded oscillating signal from the power lines;

    (5) switch decoding means coupled to the switch transceiver means for detecting the encoded signal;

    (6) switch control means connected to said switch decoding means for setting the selected electrical devices to the desired state, and(7) local control means for selectively locally operating the electrical device independently of the central unit and placing the electrical device in a state opposite from that which it was placed by the central unit.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×