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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 7394233 | High efficiency modulated power supply A modulated power supply comprises a power switching stage having at least one power switching device for generating a power signal in response to an input modulating signal. A current source is positioned in parallel with the power switching stage and continuously ... | 07/01/2008 |
| 7295452 | Active power factor correction circuit and control method thereof An active power factor correction (PFC) circuit and its controlling method are provided. The method comprises the following steps. Drive the power switch of the circuit so that the average inductor current waveform follows the rectified input voltage waveform. Suspe... | 11/13/2007 |
| 7154250 | Buck-boost DC—DC switching power conversion Apparatus operates at a power level within a range of power levels that includes a rated maximum power level of the apparatus. The apparatus includes circuit elements to deliver power at an output voltage to a load from a source at an input voltage using an inductor... | 12/26/2006 |
| 6850045 | Multi-phase and multi-module power system with a current share bus A pulse width modulator (305) for driving a load in a multi-phased power system having circuitry (270) responsive to channel signals for providing an average signal by summing the channel signals at a node (221) which is coupled with a plurality... | 02/01/2005 |
| 5852358 | Capactive power circuit A circuit for controlling power to a capacitive load includes a DC power source coupled in series with an inductor and the capacitive load. The inductor provides for resonant charging of the capacitive load from the DC source. A second inductor is used fo... | 12/22/1998 |
| 4680533 | Protection arrangement for switching device of a capacitive load pulser circuit A method and apparatus for protecting switching elements, and in particular, thyristor switching elements, which are used to supply pulses to a capacitive load, from damage resulting from sparkover occurring in that load are described. The load voltage pu... | 07/14/1987 |
| 4680532 | False triggering protection for switching device of a capacitive load pulser circuit A method and apparatus for protecting switching elements, and in particular, thyristor switching elements, which are used to supply pulses to a capacitive load, from damage resulting from false triggering signals, i.e., triggering signals not accompanied ... | 07/14/1987 |
| 4390831 | Electrostatic precipitator control Voltage and current supplied to the primary winding of the transformer-rectifier (T-R) set of an electrostatic precipitator via silicon-controlled rectifiers and a reactor are automatically controlled by sensing spit and spark discharges within the precip... | 06/28/1983 |
| 4039866 | Thyristor control apparatus A magnetic phase shifter utilizing the principle of magnetic amplifier is used as a phase shifter for applying a firing signal to a main thyristor. In order to amplify and sharpen the rise of the output pulse of the magnetic phase shifter, an auxiliary th... | 08/02/1977 |
