Celebrity Inventors
Actress Jamie Lee Curtis is a patented inventor - she created a diaper equipped with a premoistened baby wipe. And that's no act!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8149550 | Protective device having a circuit breaker, in particular a low-voltage circuit breaker A protective device is disclosed having a circuit breaker for an electrical connection between a transformer and a load, wherein an overcurrent device is arranged between the transformer and the load. The overcurrent device has first magnetoelectric transducers arra... | 04/03/2012 |
| 8035935 | Countermeasure for EMP-E3 induced currents A countermeasure for mitigating Electromagnetic Pulse E3 (EMP-E3) induced currents flowing through the neutral of a star-connected three-phase power transformer without compromising its neutral end insulation performance. It comprises an external neutral-grounding d... | 10/11/2011 |
| 8031447 | Transformer through-fault current monitor A device is provided for monitoring through-fault current in an electric transformer on an electrical power system. The device generally includes a magnitude calculator for calculating the magnitude of current (e.g., a root means square value of current or magnitude... | 10/04/2011 |
| 7936541 | Adjustable rating for a fault interrupter and load break switch A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal ele... | 05/03/2011 |
| 7813090 | DC switchgear provided with a commutation-type DC circuit breaker A DC switchgear is provided with a commutation-type DC circuit breaker having a main circuit provided with a main switch for interconnecting a DC power supply and a load, and a commutating circuit provided with a commutating capacitor and a commutating switch, which... | 10/12/2010 |
| 7755868 | Electrical equipment for distribution network The electrical equipment comprises electrical elements corresponding to at least one phase of the distribution network and housed in a tank. The equipment is insulated with a dielectric liquid wherein the elements are immersed. The equipment comprises an input for e... | 07/13/2010 |
| 7589943 | GIC reducer A device for reducing Geomagnetically-Induced Currents (GIC) in transformer apparatus of an AC power system that comprises a resistor (R10) in parallel with a protective varistor (V10) forming a passive-circuit arrangement. Such passive-circuit arrange... | 09/15/2009 |
| 7561387 | Current transformer including a low permeability shunt and a trip device employing the same A current transformer comprises a coil, a core and a shunt member. The core forms a magnetic circuit and has a first permeability. At least a portion of the core is encircled by the coil. The shunt member is coupled to the core and has a second permeability. The shu... | 07/14/2009 |
| 7489485 | Method and equipment for the protection of power systems against geomagnetically induced currents The present invention relates to a method for protection of power transformers and other power system components, which are vulnerable to geomagnetically induced currents, which comprises feeding from an overhead line/s or cable conductor/s one or more DC-diverter c... | 02/10/2009 |
| 7397643 | Protection circuit A protection circuit is coupled between a secondary winding of a transformer and a load. When voltage at the secondary winding of the transformer becomes abnormal, the protection circuit disconnects the power connection to the load so as to protect the load from dam... | 07/08/2008 |
| 7365451 | Power converter A power converter that can continue to operate after suffering a partial failure. The power converter includes multiple array transformers; normally-on switches connected respectively in series with the ends of each of the primary windings of the array transformers;... | 04/29/2008 |
| 7364084 | Integrated circuits with persistent data storage The circuitry introduced in this invention selectively slows down the functioning of an electronic circuit by maintaining a particular state for a prolonged period of time. This circuitry is used not only to achieve the desired effect in maintaining security from el... | 04/29/2008 |
| 7354287 | Shorting connector An electrical connector includes a housing that may form a first contact channel and a second contact channel. A first contact having a longitudinal axis may be disposed within the first contact channel, and a second contact may be disposed within the second contact... | 04/08/2008 |
| 7340355 | Compensated current differential relaying method and system for protecting transformer Disclosed is a compensated current differential relaying method and system for protecting a transformer more correctly by calculating and estimating an exciting current including a core-loss current and a magnetizing current, and, in particular, to a compensated cur... | 03/04/2008 |
| 7337081 | Metering device with control functionality and method thereof A metering device of a power substation and method are provided for operating on a secondary analog waveform output by a transformer assembly receiving a primary waveform. The method includes stepping down the secondary waveform and generating a corresponding output... | 02/26/2008 |
| 7329035 | Child's nightlight There is disclosed a nightlight that can be held or worn by a child and that can display projected images in 3-D mode upon a flat surface to comfort and provide assurance for a child when left in the dark. ... | 02/12/2008 |
| 7283345 | PCB trace coupling system for providing high voltage isolation A printed circuit board trace coupling system for providing high voltage isolation includes a driving circuit, a coupling transformer including a printed circuit board trace, and a receiving circuit. ... | 10/16/2007 |
| 7279905 | Method and an apparatus for supervising the operation of current transformers A method of supervising the operation of a plurality of current transformers arranged in respective groups and connected to a protection relay forming part of a three-phase electrical power system includes determining a current ratio at an output of each group of cu... | 10/09/2007 |
| 7265479 | Power supply apparatus, and image forming apparatus having the same In a power supply apparatus including a plurality of power supply circuits, each of the power supply circuits has a piezoelectric transformer, a rectification element which rectifies and smoothes a voltage output from the piezoelectric transformer in accordance with... | 09/04/2007 |
| 7237748 | Landing gear method and apparatus for braking and maneuvering Aircraft landing gear comprised of a wheel hub motor/generator disks stack, includes alternating rotor and stator disks mounted with respect to the wheel support and wheel. The wheel hub motor/generator can provide motive force to the wheel when electrical power is ... | 07/03/2007 |
| 7226018 | Landing gear method and apparatus for braking and maneuvering Aircraft landing gear comprised of a wheel hub motor/generator disks stack, includes alternating rotor and stator disks mounted with respect to the wheel support and wheel. The invention can provide motive force to the wheel when electrical power is applied, e.g. pr... | 06/05/2007 |
| 7199988 | Discharge tube lighting transformer with protective circuit against non-grounding of ground terminal An arrangement is made in a transformer such that voltages induced on the opposite sides of a mid-point 17 of a secondary winding 16 are unbalanced by an amount on the order of 5%. When a ground terminal 18 is not grounded while a mid-point of a... | 04/03/2007 |
| 7196884 | Apparatus and method for detecting the loss of a current transformer connection coupling a current differential relay to an element of a power system Disclosed is an apparatus and method for detecting a loss of a current transformer connection coupling a protective relay to a power system element of a three-phase power system and providing a plurality of secondary current waveforms of the three-phase power system... | 03/27/2007 |
| 7154061 | Interrupter assembly for a circuit breaker A preferred embodiment of an interrupter assembly for a circuit breaker includes a first contact, a conductor, and a second contact mounted on the conductor. The second contact and the conductor are movable in relation to the first contact between a first position w... | 12/26/2006 |
| 7148781 | Landscape lighting transformer having increased loading features A transformer for low-voltage applications such as landscape lighting, comprising a primary winding and a secondary winding inductively coupled to the primary winding, the primary winding adapted to be energized with a high voltage and the secondary winding adapted ... | 12/12/2006 |
| 7061183 | Zigzag topology for balancing current among paralleled gas discharge lamps An apparatus and methods for balancing current in multiple negative impedance gas discharge lamp loads. Embodiments advantageously include balancing transformer configurations that are relatively cost-effective, reliable, and efficient. Embodiments include configura... | 06/13/2006 |
| 6998848 | Method for producing a fault signal which indicates a short to ground A method and apparatus for producing a fault signal are disclosed which indicate a short to ground on a polyphase power transmission line, in which, the phase currents on the power transmission line are detected by means of current transformers in order to form a su... | 02/14/2006 |
| 6992871 | Microtransformer for system-on-chip power supply A microtransformer for a high-performance system-on-chip power supply is disclosed. Through-wafer openings in a substrate allow the primary and secondary wiring on both surfaces of the silicon substrate. An insulating silicon oxide layer is first deposited on all su... | 01/31/2006 |
| 6950764 | Arrangements to detect and respond to disturbances in electrical power systems A control arrangement and method is provided for detecting and responding to disturbances in electrical power systems. In a preferred arrangement, an integration is initiated that is based on a comparison of actual voltage of a source and a reference voltage. When t... | 09/27/2005 |
| 6937452 | Reverse wiring detect in circuit interrupting devices A resettable circuit interrupting device having a switch and timer circuit connected to the line side of the interrupting device to cause a leakage current to flow for a defined interval of time when power is applied. The timer and switch circuit comprises a timer p... | 08/30/2005 |
| 6930377 | Using adhesive materials as insulation coatings for leadless lead frame semiconductor packages A number of apparatus for packaging semiconductor devices using an epoxy ink or adhesive. In one embodiment, a pattern of epoxy is formed on the bottom surface of die attach pad of a leadless semiconductor package. The pattern of epoxy divides the undersurface of th... | 08/16/2005 |
| 6870719 | Plausibility checking of current transformers in substations The invention relates to a method, a computer program and a device (20) for the plausibility checking of current transformers (7) in an electrical switchgear assembly (1) and to a switchgear assembly (1) having such a device (20). ... | 03/22/2005 |
| 6862162 | Thyristor circuit providing overcurrent protection to a low impedance load A thyristor provides overcurrent protection to a low impedance load, such as a transformer, by adding a resistance in series with the transformer winding. As overcurrents attempt to pass through the transformer winding, a sufficient voltage is generated in the trans... | 03/01/2005 |
| 6839207 | Protection system for protecting a poly-phase distribution transformer insulated in a liquid dielectric, the system including at least one phase disconnector switch The distribution transformer is installed in a station having N phases, at least N-1 phases being equipped on the high-voltage side of the transformer with respective current-limiting fuses capable of blowing in the event of a dead short circuit between the phases. ... | 01/04/2005 |
| 6813124 | Transformer over-current protection with RMS sensing and voltage fold-back A method and apparatus for over-current protection of a transformer supplying a load. The method includes periodically sampling a current supplied to the load, calculating an RMS average current using the samples collected, comparing the RMS average current to a tar... | 11/02/2004 |
| 6766143 | Expanded capabilities for wireless two-way packet communications for intelligent electronic devices (IEDs) In an independent basic service set (IBSS) of IEDs, using wireless communications devices to provide license-free two-way wireless peer to peer communications of digital data between pairs of IEDs, and also to provide wireless peer to peer communications between one... | 07/20/2004 |
| 6668232 | Arrangements to detect and respond to disturbances in electrical power systems A control arrangement and method is provided for detecting and responding to disturbances in electrical power systems. In a preferred arrangement, an integration is initiated that is based on a comparison of actual voltage of a source and a reference volt... | 12/23/2003 |
| 6504465 | Electromagnetic coil assembly for electromagnetic apparatus An electromagnetic coil assembly for an electromagnetic apparatus has a bobbin, a coil formed of an electrical wire wound a spool of the bobbin, a thermal protection device including a pair of lead wires, a first and a second lead wire, extending from the... | 01/07/2003 |
| 6493203 | Phase control switch apparatus A phase control switch apparatus incorporating a phase-based break/make controller (80A, 80B, 80C) for protecting a reactive load such as a transformer (10) from transient surge phenomena taking place upon power-supply breaking/making operation. The phase... | 12/10/2002 |
| 6370483 | Synchronous linear machine for protective relaying Synchronous programs give increased sampling rates of AC signals and provide AC phasors yielding fast response to undesired conditions.... | 04/09/2002 |
