Patents Assigned to Service National and Enertec
  • Patent number: 4881072
    Abstract: A device for remote metering, comprising a meter (4) for measuring a consumption, a transmission circuit for transmitting information relating to quantities consumed, and consisting essentially of a modulating circuit (5,6) and of a bifilar line (3), and a counter circuit for counting sets of information. The modulating circuit comprises a capacitive network (6) and at least one switch (5) which is actuated by the meter and which is capable of modifying the capacity of the capacitive network. The device further comprises a circuit (7,14) suitable for evaluating the value of the capacity of the transmission circuit, and thus for distinguishing two states of the modulating circuit and one state of a fault in the line. Such a device is, in particular, usable for the remote metering of a consumption of gas or of electricity.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: November 14, 1989
    Assignees: Electricite de France, Service National and Enertec
    Inventor: Alain Carnel