Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 8044628 | Controller for motor A controller is provided for a permanent magnet field motor including two rotors concentrically provided around a rotating shaft and a phase changing device for changing an angle of relative displacement in a circumferential direction between two rotors to serve as ... | 10/25/2011 |
| 7863847 | Power unit A power unit which makes it possible to reduce power transmitted from a prime mover to a driven part via an electrical path, to thereby increase the efficiency of driving the driven part. A first rotating machine of the power unit inputs and outputs energy between a... | 01/04/2011 |
| 7733050 | Motion control using electromagnetic forces Motion control using electromagnetic forces. The control of motion in unpowered apparatus and an apparatus driven by electric motors and/or other prime movers utilizes electromagnetic force/torque for control of motion. One objective is to extend the domain of elect... | 06/08/2010 |
| 7528564 | Electrical machine and method for adjusting an axial spacing of the electrical machine An electrical machine including at least one sensor, a transducer wheel at which the sensor axially picks up a signal, an end face of the sensor being adjacent to an annular face on one face end of the transducer wheel, a shaft, on which the transducer wheel is axia... | 05/05/2009 |
| 7348754 | Motion control using electromagnetic forces An apparatus has (a) a first component having one or more electromagnetic elements and (b) a second component having one or more electromagnetic elements and movably coupled to the first component. The second component moves with respect to the first component in a ... | 03/25/2008 |
| 7142125 | Fan monitoring for failure prediction A method for monitoring a fan comprises measuring power usage of the fan, determining a derivative of the measured fan power usage, tracking the derivative over time, and predicting impending fan failure based on the tracked fan power usage derivative. ... | 11/28/2006 |
| 6005358 | Drive system for electric vehicles A dual-rotor electric motor (1), having an outer rotor (3) and an inner rotor (4), drives a first drive axle (5) and a second drive axle (6), while also provides inter-axle speed differential function. One of the drive axles is also a steering axle. Torqu... | 12/21/1999 |
| 5804935 | Drive system for electric vehicles A dual-rotor electric motor (1), having an outer rotor (3) and an inner rotor (4), drives a first drive axle (5) and a second drive axle (6), while also provides inter-axle speed differential function. One of the drive axles is also a steering axle. Torqu... | 09/08/1998 |
| 5714858 | Device for controlling and regulating the relative speed between rotary components interacting with one another respectively connected to the rotor and stator of an electric motor A device for controlling and regulating the relative speed between the scroll (4) and drum (2) of a centrifugal extractor, comprising a dc or ac electric motor (10), stator (10a) of which is made integral with drum (2) and rotor (10b) of which is made int... | 02/03/1998 |
| 4949023 | Direct current machine with switchable stator windings A direct current machine construction in which the rotor includes a permanent magnet with the stator including winding energizable from a direct current source. In a first embodiment first and second stationary slip rings are connected to an external dire... | 08/14/1990 |
