1
Kermit I Harner, Joseph M Kos, John P Patrick: Wind turbine generator pitch control system. United Technologies Corporation, Donald F Bradley, July 3, 1979: US04160170 (100 worldwide citation)

Wind energy is used to drive a wind turbine, which is in turn connected to an electrical generator to produce electrical power. The pitch angle of the wind turbine blades is controlled in a closed loop manner to maintain either a constant generator speed for isolated power generating stations or whe ...


2
Joseph M Kos, John P Patrick, Kermit I Harner: Multi-mode control system for wind turbines. United Technologies Corporation, Donald F Bradley, March 11, 1980: US04193005 (88 worldwide citation)

A multi-mode electronic wind turbine control system establishes a reference blade angle for a two-bladed, horizontal axis, variable pitch wind turbine rotor, the blade angle being regulated by a hydraulic pitch change mechanism. The rotor, via appropriate shafts and a gearbox, is coupled to a synchr ...


3
Kermit I Harner: Wind turbine generator acceleration control. United Technologies Corporation, Donald F Bradley, February 19, 1980: US04189648 (75 worldwide citation)

A power generating system includes a wind turbine driven generator, the wind turbine having a wind turbine driven rotor with a variable pitch angle blade. Stresses on the system during startup and shutdown are minimized by scheduling the blade angle as a function of the rotor speed and wind velocity ...


4
John P Patrick: Wind turbine generator having integrator tracking. United Technologies Corporation, Donald F Bradley, July 17, 1979: US04161658 (63 worldwide citation)

A power generating system includes a wind turbine driven generator, the wind turbine having a wind driven rotor with a plurality of variable pitch angle blades. The blade angle is scheduled during acceleration and deceleration of the wind turbine by open loop controls to minimize stresses, and is sc ...


5
Thomas M Reeder, Anthony J Demaria: Surface acoustic wave transducer. United Technologies Corporation, Donald F Bradley, September 7, 1976: US03978731 (46 worldwide citation)

Surface acoustic waves are propagated across a thin, flexible diaphragm which is subjected to an applied external pressure. Since the wave velocity and path length vary with diaphragm deformation, the acoustic wave delay time is a function of the applied external pressure. Electroacoustic transducer ...


6
Anthony J Fastaia, Thomas A Cross: Vehicle exhaust gas analysis system with gas blockage interlock. United Technologies Corporation, Donald F Bradley, July 10, 1979: US04160373 (45 worldwide citation)

The contaminants in the exhaust gas emissions from a motor vehicle such as carbon monoxide (CO) and hydrocarbons (HC) are analyzed within a nondispersive infrared analyzer which includes means for assuring that the vehicle being tested has achieved a predetermined engine speed and that no blockage h ...


7
Terence W Jowett, Thomas A Cross: Automatic gas analysis and purging system. United Technologies Corporation, Donald F Bradley, August 10, 1976: US03973848 (44 worldwide citation)

The contaminants in the exhaust gas emissions from a motor vehicle such as carbon monoxide (CO) and hydrocarbons (HC) are analyzed and the concentration of the contaminants together with other pertinent data is displayed in a digital manner. The exhaust gas emissions are fed into a sample cell conta ...


8
George C Rannenberg: Combined air cycle heat pump and refrigeration system. United Technologies Corporation, Donald F Bradley, John Swiatocha, October 20, 1981: US04295518 (36 worldwide citation)

In an air conditioning system for a load, air is used as the refrigerant, and identical components including a turbocompressor and a regenerative heat exchanger are used for both cooling in the refrigeration mode and heating in the heat pump mode. A plurality of valves are arranged so that in the re ...


9
Charles J Insalaco: Cover for nursery pots providing improved protection, support and feeding. Donald F Bradley, June 8, 1976: US03961443 (35 worldwide citation)

A cover for nursery and flower pots is constructed from a thin flexible plastic material having a plurality of holes therein through which water and nutrients may be supplied to the stock. A circumferential lip about the outside perimeter of the cover is adapted to fit over the top of a pot and secu ...


10
George C Rannenberg: Efficiency fluid pumping system including sequential unloading of a plurality of pumps by a single pressure responsive control valve. United Technologies Corporation, Donald F Bradley, John Swiatocha, January 20, 1981: US04245964 (34 worldwide citation)

In a fluid pumping system in which a fluid is pumped from a fluid supply to a load, two continuously driven fixed displacement pumps are operated in parallel to provide the pumping action. The two pumps are arranged with a common inlet, and with a common outlet, the flow delivered to the load from o ...



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