Patents by Inventor Jackson Henry Smith

Jackson Henry Smith 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).

  • Variable speed control switch for direct current electric power tools
    Patent number: 5892885
    Abstract: A motor control circuit for a power tool includes a function switch which has a first battery contact, a speed control contact, a bypass contact and, a second battery contact connected in that order in a line. The function switch also has a movable contact which sequentially connects the first battery contact to the bypass contact, the speed control contact to the second battery contact, and the bypass contact to the second battery contact. A solid state switch has conduction path connecting the speed control contact to the second motor terminal wherein the conduction path is controlled in response to an oscillator signal.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: April 6, 1999
    Assignee: Eaton Corporation
    Inventors: Jackson Henry Smith, Michael Thomas Little