Patents by Inventor John A. Caspar

John A. Caspar 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).

  • Commutator brush holder quadrature spring
    Patent number: 4371803
    Abstract: A commutator brush holder mounts a pair of tension band springs in quadrature relation. Both springs contact the brush end remote from the commutator and urge the brush into contact with the commutator, with constant force. The quadrature springs promote full and intimate contact between the brush and commutator, thereby minimizing brush bounce and tilt and resultant transient signal generation.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: February 1, 1983
    Assignee: The Singer Company
    Inventors: Arnold Schindel, John A. Caspar