Patents by Inventor Leon L. Douglas

Leon L. Douglas 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: 4058055
    Abstract: An apparatus is disclosed which is particularly designed for applying transfers or appliques comprised of thermosetting inks to garments such as T-shirts and sweat shirts. The apparatus includes an upper and lower platen for applying heat and pressure. The upper platen includes heating elements and a temperature control mechanism to heat it to a particular desired temperature. The apparatus is designed so that the pressure between the two platens is uniform and of the proper magnitude. The apparatus is also designed so that when the garment and transfer have been subjected to the appropriate amount of pressure and heat for a desired amount of time, the platens automatically disengage. Upon disengaging, a timer which is included in the apparatus automatically resets itself to the originally selected time period.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: November 15, 1977
    Inventor: Leon L. Douglas
  • Patent number: 3957226
    Abstract: A mechanism is provided for controlling the directional heading of a helicopter, particularly during hover and autorotation. In addition the mechanism provides additional thrust which enables the helicopter to increase its maximum velocity. The mechanism includes three nozzles with valves positioned therein, located in the rearward portion of the helicopter fuselage. Two of the nozzles are located on opposite sides of the aircraft fuselage to provide thrust for use in controlling the directional heading of the aircraft. This thrust is also used to counteract the torque generated by the driving of the lifting rotor of the helicopter. The third nozzle is positioned so that the thrust generated by it will increase the forward velocity of the helicopter. A propeller or fan located in the body of the aircraft forces air from intakes through the fuselage to the nozzles. The position of the valves is determined by suitable control linkage.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: May 18, 1976
    Assignee: The Boeing Company
    Inventors: Myron L. Daggett, Jr., Leon L. Douglas
  • Patent number: D250340
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: November 21, 1978
    Inventor: Leon L. Douglas