Patents by Inventor Alain Rouquet

Alain Rouquet 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).

  • Direct current proximity detector having switching means which provide on two distinct outputs, signals when the target is located beyond or within a predetermined range
    Patent number: 4056769
    Abstract: A direct current proximity detector having a first terminal directly connected, to a terminal of a supply source and second and third terminals connected to the other terminal of the supply source through a load, an oscillator associated with a detector of its state of oscillation, a voltage stabilizer and a static switching device. The switching device comprises first and second transistors, the conducting state of the respective transistors depending upon the state of a corresponding output of an inverter unit which is controlled by the detector. The two transistors are connected to the first terminal through a Zener diode, second and third terminals being interconnected by means of two serially connected diodes of opposed polarities the common point of which supplies the voltage stabilizer.
    Type: Grant
    Filed: February 25, 1976
    Date of Patent: November 1, 1977
    Assignee: La Telemecanique Electrique
    Inventors: Marcel Lefebvre, Alain Rouquet