Patents by Inventor Jean M. Periot

Jean M. Periot has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Proximity detector using inductive effect on oscillating circuit the charge of which is controlled by a pulse of short duration
    Patent number: 4893076
    Abstract: A proximity detector is provided with an oscillating circuit generating cyclically an unsustained pseudo-oscillation. The detector includes a processing circuit having a comparator which compares the relaxation voltage of the oscillating circuit with a predetermined threshold and a logic circuit which generates control pulses with low duty ratio for a switch in series with the oscillating circuit and also an output signal as a function of the measurement pulses delivered by the comparator. The closure duration of the switch is substantially equal to half the pseudo-oscillation period.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: January 9, 1990
    Assignee: La Telemecanique Electrique
    Inventors: Didier Leonard, Jean M. Periot, Pierre Petit