Patents by Inventor Etienne Deffontaine

Etienne Deffontaine 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).

  • System for detecting the presence of a yarn on a continuous spinning frame
    Patent number: 4525705
    Abstract: The system according to the invention comprises a sensor composed of a movable unit formed by an electrical circuit in which are placed two supple blade switches closed by a rocking member in response to the presence of a yarn. Said circuit comprises a conductor wound on a magnetic core. The data transmitting device comprises a fixed looped conductor of which one part is parallel to the path followed by the sensor and traverses the core. Means are provided for generating oscillations in the looped conductor, as well as means for detecting a variation in the oscillating conditions induced by a change of state of the electrical circuit due to the closure of one switch and indicating that the sensor has met up with a yarn. Due to the detection of the variations in the oscillating conditions, it is possible to find out the number of breakages occurring in the textile machine.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: June 25, 1985
    Assignees: Centre Technique Industriel Dit: Insttiut Textile de France, Establissement Public Dit: Agence Nationale de Valorisation de la Recherche (Anvar)
    Inventors: Jacques Edme, Etienne Deffontaine