Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7436842 | Outlet with analog signal adapter, a method for use thereof and a network using said outlet An outlet for a Local Area Network (LAN), containing an integrated adapter that converts digital data to and from analog video signal. Such an outlet allows using analog video units in a digital data network, eliminating the need for a digital video units or externa... | 10/14/2008 |
| 7352082 | Transfer switch device and method This disclosure is concerned with devices and methods for voltage source transfer switching that reduces or eliminates transformer saturation due to DC flux built up during a transfer event. First and second voltage sources (primary and alternate) are connectable to... | 04/01/2008 |
| 7265458 | Apparatus and methods for coordinated static switch operations for load transfers in uninterruptible power supply systems A power supply apparatus includes an uninterruptible power supply (UPS) having an input configured to be coupled to a first power source and an output configured to be coupled to a load and a first static switch configured to provide a switchable bypass path from th... | 09/04/2007 |
| 7161307 | Power factor correction apparatus with embedded DC—DC converter A power factor correction apparatus with an embedded direct-current to direct-current (DC-DC) converter is provided. The apparatus includes a power factor controller, a high-voltage adapter and a low-voltage adapter. The power factor controller, which receives an AC... | 01/09/2007 |
| 7129610 | Commutator for an electric motor A commutator includes a support ring and a plurality of conducting segments arranged over a circumference of the support ring. Some of the conducting segments have an electrically insulating portion. The commutator is employed with a device that measures rotation of... | 10/31/2006 |
| 7016793 | Method and apparatus for anti-islanding protection of distributed generations An apparatus for anti-islanding protection of a distributed generation with respect to a feeder connected to an electrical grid is disclosed. The apparatus includes a sensor adapted to generate a voltage signal representative of an output voltage and/or a current si... | 03/21/2006 |
| 6823232 | Drive controller operator interface and serial protocol A drive controller operator interface and serial protocol therefor are provided for controlling electric motors and other electrical devices which are typically powered by inverters that convert input power to control input signals for the motor or other electrical ... | 11/23/2004 |
| 6801442 | Power conversion apparatus, power conversion system, and islanding operation detection method When islanding operation is to be detected in a power conversion apparatus for converting a DC power into an AC power and outputting the AC power to a system power supply, a plurality of variation generation systems for executing, in accordance with different scheme... | 10/05/2004 |
| 6219623 | Anti-islanding method and apparatus for distributed power generation The invention in the simplest form is a method and apparatus for reliably protecting against island situations with one or multiple power sources connected to an electric distribution grid. The method and apparatus detects variations in the voltage and fr... | 04/17/2001 |
| 6169682 | Non-directional frequency generator spark removal circuit A non-directional frequency generator for converting direct current into alternating current includes a direct current input end connected with a direct current power source and an alternating current output end connected with an alternating current outpu... | 01/02/2001 |
| 6166936 | Non-directional frequency generator A non-directional frequency generator capable of minimizing frictional noise generated due to a mechanical rotation mechanism, including: a plurality of brushes connected with a direct current power source; and a commutator which converts a direct current... | 12/26/2000 |
| 6104149 | Circuit and method for improving short-circuit capability of IGBTs A simple, off-chip circuit and method for endowing high efficiency IGBTs with short-circuit capability, that is essentially transparent to the user. The invention involves adding an external common emitter resistor to reduce the effective gain of an IGBT ... | 08/15/2000 |
| 6081082 | Rotatable inverter Disclosed is a rotatable inverter. The rotatable inverter comprises a rotatable inverting means for inverting a DC power source to an AC power source by means of a rotational force, and a transformer which receives the AC power source inverted by the rota... | 06/27/2000 |
| 5633792 | Pulse width rotary inverter A rotary type inverter capable of generating a variable pulse train electro-mechanically for converting D.C. to A.C. with a Sine wave shape, and consists primarily of a D.C. electric motor driving a "variable pulse width" generating drum. Mounted over thi... | 05/27/1997 |
| 5532913 | Electric power source An AC high-voltage power supply circuit, adapted for use in an image forming apparatus, for example in the separation charger of an electrophotographic copier, and capable of controlling the DC component of an AC high voltage, over a wide range including ... | 07/02/1996 |
| 5420782 | Electronic commutation for a moving magnetic field electric power converter An apparatus and method for inverting direct current electrical power into alternating current electrical power by producing a moving magnetic field having substantially constant flux density when the direct current power is applied to a primary winding, ... | 05/30/1995 |
| 5347191 | Dynamic transformer power supply In a power supply for use with electronic equipment, the power supply includes a dynamic transformer having a single rotary element with permanent magnets attached, magnetic bearings to support the rotary element during operation, primary and secondary wi... | 09/13/1994 |
| 5210685 | Uninterruptible power supply system and load transfer static switch for such a system A UPS system which operates initially in a commutation mode allowing commutation of the static transfer switch provided on the primary supply lines, and wherein the standby source is kept energized so as to operate to commutate such transfer switch throug... | 05/11/1993 |
| 4717995 | Procedure for converting direct electrical energy into alternating electrical energy A procedure for converting direct electrical energy into alternating electrical energy is disclosed. An apparatus sequentially sweeps the connecting points of a number of DC power supplies in order to provide an alternating current wave form. The sequenti... | 01/05/1988 |
| 4707629 | Rotary converter having dual-winding rotor The present invention includes a rotary converter for converting direct current to altenating current. The rotary converter includes a rotor and a stator. The rotor includes a shaft, a commutator concentric with the shaft, and an armature core concentric ... | 11/17/1987 |
| 4194239 | Electrical invertor apparatus An electrical invertor circuit comprising a first common electrode and at least two secondary electrodes and means permitting an electric discharge to be established between said first electrode and any one of said second electrodes. A magnetic field is a... | 03/18/1980 |
| 4012641 | Portable pulsed signal generator A portable pulsed signal generator which generates a low-frequency, high-ered signal from a constant direct current, low power source is disclosed as including an inverter for driving a plurality of motors which, in turn, actuate control switches by mean... | 03/15/1977 |
