Patents by Inventor John M. Stevenson

John M. Stevenson 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).

  • Shock-actuated lock with resettable ball
    Patent number: 5152562
    Abstract: A shock-activated lock for attachment to a cabinet that prevents the cabinet door from opening in the event of an earthquake. The lock includes a slotted engaging member attached to the cabinet door, and a lock housing attached to the cabinet frame that contains a ball that normally rests on a raised shelf. The engaging member extends into the housing when the door is closed. In the event of an earthquake, the ball falls into the slot in the engaging member, preventing the engaging member from withdrawing from the housing, thus preventing the cabinet door from opening.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: October 6, 1992
    Inventors: John M. Stevenson, James M. Simpson