Patents by Inventor C. A. Letort

C. A. Letort 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).

  • Process for checking the dimension of a part
    Patent number: 4260260
    Abstract: In a process for checking the dimension of a part, the part is moved continuously through a parallel beam of light, in a direction perpendicular to the axis of the beam, and forms a moving shadow on a pair of spaced photoelectric cells. The cells are spaced apart a distance such that there is a zone in the movement of the part in which both cells are partially shadowed and the sum of the areas of the illuminated parts of the surfaces of the cells is measured at the moment when the difference between the areas of the illuminated parts of the surfaces of the cells is zero, and compared with a reference.
    Type: Grant
    Filed: April 14, 1978
    Date of Patent: April 7, 1981
    Assignee: Societe d'Optique, Precision Electronique et al Mecanique-SOPELEM
    Inventors: C. A. Letort, Helenio Llop, B. Grandjacques