Patents by Inventor Benjamin G. Pastrick

Benjamin G. Pastrick 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).

  • Bounce dampening system for switch actuators
    Patent number: 4264225
    Abstract: A bounce dampening system reduces switch actuator bounce when the actuators are restored to their home position. Included are selection interposers, one of which is selectively driven to thereby effect motion of selection bails and corresponding switch actuators. A reverse interposer is simultaneously driven. A spring restores the reverse interposer after the actuation cycle thereby carrying the bails and switch actuators to their home position. The return spring and the mass of the reverse interposer prevents actuator bounce and insures a timely return of the actuators.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: April 28, 1981
    Assignee: International Business Machines Corporation
    Inventors: John N. Cassell, John A. Elder, Jr., Benjamin G. Pastrick, William J. Thornhill