Patents by Inventor David J. Fincher

David J. Fincher 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).

  • Sensing arrangements
    Patent number: 4142152
    Abstract: This disclosure relates to a directional sensing arrangement including a rotatable member having a plurality of permanent magnets which magnetically influence a first and second spaced stationary sensor. The rotation of the member causes the magnets to sequentially operate the first and second sensors so that neither, either or both are actuated. The first and second sensors are coupled to a logic network which deciphers the sequential actuations for determining the direction of rotation of the rotatable member.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: February 27, 1979
    Assignee: Westinghouse Brake and Signal Company Limited
    Inventor: David J. Fincher