Patents by Inventor George B. Pratt

George B. Pratt 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).

  • Patent number: 4814732
    Abstract: A magnetic latching actuator is disclosed having an arrangement of components which cooperate to minimize internal friction, while ensuring smooth and efficient operation. The invention uses a core having at least one electrical coil. In communication with the core is a permanent magnet. The magnet is positioned against a U-shaped magnetic flux connector having two parallel plates. The plates are sufficiently spaced from each other to permit the passage of a U-shaped armature therebetween. The armature is movable between the plates of the flux connector, enabling the transfer of magnetic flux to the armature while avoiding frictional engagement between the armature and flux connector. The armature further includes two end portions each designed to alternately engage the core at opposite ends.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: March 21, 1989
    Assignee: Tektronix, Inc.
    Inventor: George B. Pratt