Patents by Inventor Karen M. Carlson

Karen M. Carlson 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).

  • Cassette tape player having circuit for detecting reverse rotation of take-up reel
    Patent number: 5489071
    Abstract: A system for preventing improper tape feed in a cassette tape player uses pulse width measurements from the take-up reel output signal to sense normal or aberrant tape feeding conditions. The pulse width of the output signal is compared with a predetermined range of pulse widths associated with normal tape operation. The range is variable as a function of the rotational frequency of the take-up reel and is updated periodically to reflect changes in the diameter of the take-up reel as the tape plays. If the pulse width of the output signal falls outside of the predetermined range, it denotes an aberrant tape feeding condition.
    Type: Grant
    Filed: April 6, 1994
    Date of Patent: February 6, 1996
    Assignee: Ford Motor Company
    Inventors: Gerald W. Tarpley, Jr., Kenneth C. Miller, Karen M. Carlson