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Network user for maintaining data and energy transmission

  • US 4,973,954 A
  • Filed: 01/24/1989
  • Issued: 11/27/1990
  • Est. Priority Date: 09/16/1986
  • Status: Expired due to Fees
First Claim
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1. A local area network, comprising:

  • means for transmitting data and energy throughout the local area network;

    means for supplying energy to said transmitting means at a predetermined level from a central location on the local area network, wherein the energy is alternating-current voltage with a half-wave cycle for synchronizing data;

    at least one network user connected to said transmitting means for sending data containing destination addresses throughout the network and for receiving data only if the destination address identifies said network user, so when the data is for said network user identified by the destination address, said network user also receives the energy with the alternating-current voltage, otherwise said network user being connected to said transmitting means merely modulates the energy on said transmitting means to the predetermined level of the local area network, wherein on failure of said energy supply means said user is converted by a network driver, into the "out of operation" state with low energy consumption, and the operation energy is maintained by an accumulator is said user, until said network driver converts the user back into the "ready for operation" state after receipt of a destination address, andsaid user coupled with UART, USART through said network driver to the network.

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