Patents Examined by Michael Horablk
  • Optical port multiplexer for electric metering equipment
    Patent number: 5010335
    Abstract: A single optical port in an electric meter is multiplexed between at least two internal systems by using a multiplexer circuit which has a set of data lines which can be connected to the optical port and to one of the internal systems. The multiplexer is controlled by means of a magnetic reed switch which is mounted within the cover of the meter, so no mechanical changes to the meter cover are required.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: April 23, 1991
    Assignee: Schlumberger Industries, Inc.
    Inventors: Richard Coppola, Farrokh Khandaghabadi