Bizarre Patents
A haircutting appliance comprises an enclosed housing having a hollow handle connecting the housing to a vacuum source to carry away cut hairs from a subject's head.
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 |
| 7990668 | Device protection using temperature compensation Device protection using temperature compensation. A logic module associated with groups of capacitors adjusts complex impedance planes associated with the capacitor groups to account for ambient temperature variations. In particular, the logic module is configured t... | 08/02/2011 |
| 7368832 | Circuit and fault tolerant assembly including such circuit A circuit is provided that provides for the same power characteristics to an assembly of electrical resistive elements wired in parallel as to the assembly as wired in series. An input power source provides electrical resistive power to a plurality of load elements,... | 05/06/2008 |
| 7365951 | Discharge lamp lighting device, lighting system and method A method and apparatus for protecting a discharge lamp lighting device from damage due to mis-wiring of a source of electrical power to the discharge lamp lighting device. The protection apparatus includes a detector, a comparer and an inhibitor. The detector sample... | 04/29/2008 |
| 7365450 | Current cutoff circuit and electric steering wheel lock An electric cutoff circuit for preventing overheating of a load. The current shutoff circuit includes an FET connected to a motor circuit. A relay fault detection circuit is connected to the motor circuit to detect potential at the motor circuit. A CPU sends a contr... | 04/29/2008 |
| 7330512 | System and method for the data transmission of digital transmission data The invention relates to a system for the data transmission of digital transmission data (17, 18) between a first digital protective device (1) and a second digital protective device (9) on a section (A) of an energy supply line (2) in a ... | 02/12/2008 |
| 7310049 | Status indicator A status indicator indicates an operating state, including an electrical malfunction, of an electrical load that is located and controlled from locations remote from a monitoring location. ... | 12/18/2007 |
| 7304826 | Fault management of high temperture superconductor cable A method and system for providing protection for a superconducting electrical cable located in a utility power network includes detecting a fault current on the superconducting electric cable, determining the cumulative total energy dissipated in the superconducting... | 12/04/2007 |
| 7282921 | System, apparatus and method for detection of electrical faults System for monitoring an electrical system of a facility includes one or more local sensing devices, each of which is adapted to be connected to the electrical system of the facility in proximity to a respective load that receives power from the electrical system so... | 10/16/2007 |
| 7256683 | Circuit monitoring device The circuit monitoring device is disclosed. The device is for monitoring circuit resistance. At configurable thresholds digital flags are triggered, the device can be used as a Security/Building management system. The device uses open technology is fully scaleable a... | 08/14/2007 |
| 7253640 | Arc fault detector and method for locating an arc fault A circuit breaker for locating an arc fault for a protected circuit includes separable contacts interrupting the protected circuit and an arc fault detector determining an arc fault in the protected circuit. An analog to digital converter circuit measures a value of... | 08/07/2007 |
| 7253634 | Generator protection methods and systems self-tuning to a plurality of characteristics of a machine A method for detecting stator ground faults in a generator is described. The method includes receiving a neutral voltage signal from a neutral point of a stator, receiving a plurality of terminal voltage and current signals from the stator, deriving a magnitude of a... | 08/07/2007 |
| 7254001 | Circuit protection system A circuit protection system is provided that provides a dynamic delay time to an upstream circuit breaker if a fault is detected in a circuit where the dynamic delay time can be based upon the location of the fault, such as the nearest downstream circuit breaker. A ... | 08/07/2007 |
| 7245469 | DC backup power supply device and method for diagnosing the same A reliable uninterruptible DC power supply device. The DC backup power supply device includes an AC/DC converter, a DC/DC converter, voltage step-up/down choppers and a battery connected to a DC path of a main circuit connected with a load via a switch, and a microc... | 07/17/2007 |
| 7231003 | System and method for aligning data between local and remote sources thereof The communication system includes two communication channels for communication of protection and control information between two protective relays on a power line portion of an electric power system. A switch provided at the receiving relay connects one communicatio... | 06/12/2007 |
| 7218493 | Circuit breakers with integrated current and/or voltage sensors A circuit breaker (100), in particular a medium voltage circuit breaker, having a current (20) and/or a voltage measuring device (30) integrated thereon. The integration can be functional and/or physical. The functionally integrated current and/... | 05/15/2007 |
| 7193338 | Method for tapping a high voltage transmission line and substation using the same A method of tapping a high voltage transmission line for input into a power distribution substation is disclosed. The method comprises the steps of dividing the transmission line and attaching the conductors to the primaries of at least two transformers via a series... | 03/20/2007 |
| 7191076 | Expandable intelligent electronic device An intelligent electronic device (IED) includes a base module having a power monitoring circuit operative to monitor a parameter of a portion of a power distribution system and generate an analog signal representative thereof. The base module also includes a process... | 03/13/2007 |
| 7190124 | Two-wire dimmer with power supply and load protection circuit in the event of switch failure A dimmer circuit provides AC power to an inductive lighting load in series with the dimmer circuit. A bidirectional semiconductor switch has a control electrode with a control signal for determining the power provided to the load. The switch in normal operation is c... | 03/13/2007 |
| 7191074 | Electric power monitoring and response system An electric power monitoring and response system using electromagnetic field sensors located remotely beside the phase conductors. The system determines unknown system variables for one or more three-phase power lines based on measured values obtained form the field... | 03/13/2007 |
| 7188003 | System and method for securing energy management systems A power management architecture for an electrical power distribution system, or portion thereof, is disclosed. The architecture includes multiple intelligent electronic devices (“IED's”) distributed throughout the power distribution system to manage the flow and... | 03/06/2007 |
| 7174261 | Power line sensors and systems incorporating same An apparatus for sensing the current in a power line of a power system and systems incorporating the apparatus are disclosed. The apparatus may comprise an enclosure providing a window operable to permit the passage of the power line therethrough. The apparatus may ... | 02/06/2007 |
| 7154722 | Loop control for distribution systems The invention contemplates a technique for providing loop control on a faulted overhead or underground loop system, while preventing restored current from being fed or back fed into the fault. In particular, the invention provides a method, device, and system for re... | 12/26/2006 |
| 7151329 | Integrated protection, monitoring, and control system A method and system for monitoring and controlling a power distribution system is provided. The system includes a plurality of circuit breakers and a plurality of node electronic units. Each node electronic unit is mounted remotely from an associated circuit breaker... | 12/19/2006 |
| 7110231 | Adaptive protection system for a power-distribution network A preferred embodiment of a system comprises a recloser electrically coupled to a voltage source of a power-distribution network and adapted to isolate a section of a distribution feeder of the power-distribution network from the voltage source in response to an ove... | 09/19/2006 |
| 7090501 | Connector apparatus A connector system includes a circuit board having a plurality of holes extending therethrough. First and second connector bodies, each having a front wall, are positioned on first and second sides of the circuit board, respectively. The front walls of the connector... | 08/15/2006 |
| 7071580 | Uninterruptible power supply apparatus An uninterruptible power supply apparatus is equipped with a power supply input section a 2 and a power supply input section b 3 that receive two systems of power supply, respectively; a power supply output section a 4 and a power supply output ... | 07/04/2006 |
| 7064458 | Method and system for transferring a load between AC voltage sources A method and system for transferring a load from a first AC voltage source to a second AC voltage source. A temporary voltage source is connected to the load and to the first voltage source via a resistor. The first voltage source is disconnected from the load. The ... | 06/20/2006 |
| 7055043 | Power system management method and power system management system Function of an equipment control apparatus is changed from outside of the equipment control apparatus by means of a communication method of higher security than that of a monitoring system operating via a Web communication net: the equipment control apparatus being ... | 05/30/2006 |
| 7042690 | Power-line, differential, isolation loss detector In one embodiment, an integrated differential isolation loss detector is disclosed that generates a first temperature that is a function of a high side current and a second temperature that is a function of a low side current. A temperature sensor senses the differe... | 05/09/2006 |
| 7043340 | Protection system for power distribution systems A protection system for a power distribution system is provided. The protection system includes a central computer, a plurality of data modules, and a data network. The data modules are each in communication with a different circuit breaker of the power distribution... | 05/09/2006 |
| 7030593 | Multiple path variable speed constant frequency device having automatic power path selection capability The present invention relates to variable speed constant frequency (VSCF) devices and methods for maximizing engine generator efficiency. In one embodiment, a VSCF device may include at least two paths for conducting power to the load. One path, a line inductor path... | 04/18/2006 |
| 6985800 | Protection of an electric power transmission network For the control of an electric power transmission network, where local protection functions are implemented by a plurality of local protection devices (3,3a,3b,3b′,3c) located at a plurality of locations thro... | 01/10/2006 |
| 6900971 | Power supply device A power supply device for an electronic protection unit for AC/DC low- and/or medium-voltage power networks, comprising: first electronic means, which are suitable to transduce electric power from an AC/DC low- and/or medium-voltag... | 05/31/2005 |
| 6684134 | Electrical fault protection system A fault protection system whose trip logic considers power magnitude and direction at first and second points on a conductor is provided. Under normal operating conditions, power flows in the same direction through first and second points on the conductor... | 01/27/2004 |
| 6671151 | Network protector relay and method of controlling a circuit breaker employing two trip characteristics A network protector relay controls a circuit breaker connected between polyphase feeder and network busses. A circuit samples polyphase circuit breaker current and network voltage to generate digital polyphase current and voltage samples. A microcontrolle... | 12/30/2003 |
| 6654216 | Distributed monitoring and protection system for a distributed power network A distributed monitoring and protection system for a distributed power network. The system includes a plurality of high-speed measuring units (MUs), wherein each MU is coupled to a power line to measure values of electrical parameters of the power line. E... | 11/25/2003 |
| 6646843 | Short circuited semiconductor switch detection A method and apparatus are provided for detecting a short circuited semiconductor switch. The apparatus comprises a semiconductor switching device and a short circuited switch detection device. The semiconductor switching device comprises an input, an out... | 11/11/2003 |
| 6496342 | Distributed monitoring and protection system for a distributed power network A distributed monitoring and protection system for a distributed power network. The system includes a plurality of high-speed measuring units (MUs), wherein each MU is coupled to a power line to measure values of electrical parameters of the power line. E... | 12/17/2002 |
| 6426856 | Method for monitoring a protective gear A method of operating a protective gear is described, in particular a remote protective gear for an electric power grid. In this method, a voltage signal is derived from the line voltage, and a current signal is derived from the line current. To guarantee... | 07/30/2002 |
| 6201675 | Monitoring system for a power distribution system and a method of operation thereof For use in a power distribution system having first and second output power feeds having corresponding first and second circuit protection devices associated therewith, a monitoring system and a method of monitoring a utilization of the power distribution... | 03/13/2001 |
