Patents Assigned to Magnetic Laboratories, Inc.
  • Electromagnetic reciprocating linear actuator with permanent magnet armature
    Patent number: 4259653
    Abstract: A spring-less linear actuator, especially useful as a print wire drive. A permanent magnet armature is driven from a rest position on a pole piece by magnetic repulsion upon energization of a solenoid by a D.C. pulse. The armature is fixed to a print wire which rebounds from a printing medium, thereby returning the permanent magnet toward the rest position, where it is held, without bouncing, by the magnetic attraction between the armature and the pole piece of the solenoid, which is now de-energized.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: March 31, 1981
    Assignee: Magnetic Laboratories, Inc.
    Inventor: James J. McGonigal