Patents by Inventor Ted W. Johnson

Ted W. Johnson 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).

  • Speed change device
    Patent number: 4340377
    Abstract: Complementary relatively stationary pulleys having axially oppositely stepped diameter portions form a variable speed drive between a motor coupled with one stepped pulley and a driven device coupled with the oppositely stepped pulley such as the spindle of a drill press on which the device is mounted. A transmission belt for the stepped pulleys is bodily shifted with an associated belt tensioning idler pulley, a belt shaper guide, and a compression belt former selectively to position the belt in alignment with chosen diameter portions of the two stepped pulleys to effect a desired speed change while the belt is in a deformed state out of contact with the stepped pulleys, following which the belt is retensioned to engage it with the chosen stepped portions of the complementary stepped pulleys.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: July 20, 1982
    Assignees: Hamilton Bros. Mfg. Co., Ted W. Johnson
    Inventors: Ted W. Johnson, William R. Hamilton, Archie I. Hamilton