Patents Assigned to Joseph F. Fritsch
  • Cleaning device for disc drive unit
    Patent number: 4868700
    Abstract: A cleaning device for cleaning a read/write head of a floppy disc drive unit comprises a plate member for insertion in the floppy disc receiving area. A cleaning member formed by a backing material with a plurality of upstanding tufts of fibres to clean the read/write head is provided in recesses on front and back surfaces of the plate member. Cleaning members are provided in recesses of the plate member to clean guide rails in the floppy disc receiving area.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: September 19, 1989
    Assignees: Joseph F. Fritsch, Roxanne Y. Fritsch
    Inventors: Joseph F. Fritsch, Alexander McDonnell
  • Demagnetizing device having an oscillating permanent magnet
    Patent number: 4851945
    Abstract: A demagnetizing device for demagnetizing a sound head in a cassette tape recorder, comprises a cassette type housing. A carrier member pivotal in the housing carries a permanent magnet which oscillates with the carrier member sidewardly across an opening in the housing adjacent the sound head of the cassette tape recorder to demagnetize the sound head. A cam driven by a spindle of the cassette tape recorder acting on a follower drives the carrier member with oscillating movement.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: July 25, 1989
    Assignees: Joseph F. Fritsch, Roxanne Y. Fritsch
    Inventors: Joseph F. Fritsch, Roxanne Y. Fritsch, Francois Malgat