LEON L DOUGLAS
Engineers in Penn Wynne, PA
License number
Pennsylvania PE007258L
Category
Engineers
Type
Professional Engineer
Address
Address
Penn Wynne, PA 19096
Professional information
Helicopter Yaw And Propulsion Mechanism
US Patent:
3957226, May 18, 1976
Filed:
Jan 27, 1975
Appl. No.:
5/544077
Inventors:
Myron L. Daggett - Broomall PA
Leon L. Douglas - Wynnewood PA
Leon L. Douglas - Wynnewood PA
Assignee:
The Boeing Company - Seattle WA
International Classification:
B64C 2782
US Classification:
244 1719
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.
Apparatus For Applying Transfers To Fabrics
US Patent:
4058055, Nov 15, 1977
Filed:
Aug 5, 1975
Appl. No.:
5/602072
Inventors:
Leon L. Douglas - Wynnewood PA
International Classification:
B44B 500
US Classification:
101 10
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.
Press
US Patent:
D250340, Nov 21, 1978
Filed:
Feb 9, 1977
Appl. No.:
5/767054
Inventors:
Leon L. Douglas - Wynnewood PA
International Classification:
D1802
US Classification:
D15146