Quotables
"There is practically no chance communications space satellites will be used to provide better telephone, telegraph, television, or radio service inside the United States."
T. Craven, FCC Commissioner ; 1961
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 |
| 7663850 | Earth fault protection of a frequency converter A method in connection with a frequency converter, which frequency converter comprises output phases and switches of the output phases, the output phases being switched to feed a load, and the main circuit of the frequency converter being provided with common-mode i... | 02/16/2010 |
| 7440246 | Circuit interrupting apparatus with remote test and reset activation The present disclosure relates to resettable circuit interrupting devices and apparatus capable of being tested and reset from remote locations, and in particular to portable circuit interrupting devices and apparatus capable of being tested and reset from remote lo... | 10/21/2008 |
| 7375938 | Miswire protection switch compression spring The present invention is directed to a ground fault circuit interrupt (GFCI) device. The GFCI device includes a GFCI device housing. A GFCI circuit is enclosed within GFCI device housing. The GFCI circuit is configured to detect a ground fault condition. A second de... | 05/20/2008 |
| 7317599 | Multifactor adaptive auto-reclosing of high voltage transmission lines One embodiment of the invention provides a method, system, and device for the auto-reclosing a faulted power transmission line by measuring the characteristics of voltage on a faulted line to determine, in real-time, the moment that the secondary arc is extinguished... | 01/08/2008 |
| 7292011 | Electrical protection of a generator controller A generator system includes a generator control for providing electrical power to a main generator. The main generator is mechanically coupled to an electrical power source that provides electrical power to the generator control during operation of the main generato... | 11/06/2007 |
| 7193837 | Plug and circuitry for grounding an element A plug includes an element that is electrically connected to a ground element in a receptacle in a set up configuration and an electrical connection that is attached to an element to be grounded whereby an element, person, or device, or the like, can be securely gro... | 03/20/2007 |
| 7164996 | Power breaking apparatus for prevention of electrical shock A power breaking apparatus for prevention of electrical shock breaks AC power supplied to electrical structures such as traffic lights, streetlights etc. if a leakage voltage is detected over a preset voltage or the electrical structures are inundated, thereby preve... | 01/16/2007 |
| 7136265 | Load recognition and series arc detection using bandpass filter signatures A method and system for determining whether arcing is present in an electrical circuit includes sensing a change in an alternating current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband n... | 11/14/2006 |
| 7106565 | Directional ground relay system A directional ground relay (50) for receiving electric values relating to voltage and current from a power transmission line (1) to be protected. The directional ground relay may decide a direction of a fault in the power transmission line based upon t... | 09/12/2006 |
| 7068480 | Arc detection using load recognition, harmonic content and broadband noise A method of determining whether arcing is present in an electrical circuit includes sensing a change in current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband noise in a predetermined ran... | 06/27/2006 |
| 7064459 | Method of inhibiting corrosion of a component of a marine vessel A method for inhibiting galvanic corrosion of marine propulsion components impresses an electronic current into the protected component and causes the protected component to act as a cathode in a galvanic circuit which comprises a conductor, such as a ground wire co... | 06/20/2006 |
| 7042687 | Miswire protection switch compression spring The present invention is directed to a ground fault circuit interrupt (GFCI) device. The GFCI device includes a GFCI device housing. A GFCI circuit is enclosed within GFCI device housing. The GFCI circuit is configured to detect a ground fault condition. A second de... | 05/09/2006 |
| 7038897 | Arc fault detection system A system and method for an arc fault detection system for aircraft wiring system is disclosed. Upon detection of arc fault events, the system transmits a signal that may be sent to an existing circuitry of the aircraft electrical system, which disconnects the power ... | 05/02/2006 |
| 7035066 | Arc-default detecting circuit breaker system An arc-fault detecting circuit-breaker system is operable with a protected electrical circuit that operates with direct current or alternating current. A normally closed line circuit breaker has an electrical input and an electrical output, and an electrical line co... | 04/25/2006 |
| 7035067 | Apparatus for detecting coil failure in an actuating solenoid of an electrical power switch The continuity of the coil of the actuating solenoid of an electric power switch is detected through utilization of a signaling device, such as a light emitting diode (LED) that monitors energization of a dc power supply fed from the source side of the coil. A circu... | 04/25/2006 |
| 7031125 | Reset lockout for sliding latch GFCI Resettable circuit interrupting devices using a center latch are provided. The circuit interrupting devices include those with a reset lockout, reverse wiring protection, and/or an independent trip portion. ... | 04/18/2006 |
| 7006339 | Apparatus for and method of protecting the safe side wiring of a protective barrier against transferring fault energy into a potentially explosive environment A method of protecting safe side wiring of a protective energy barrier against transferring fault energy into a potentially explosive environment comprises the steps of: enclosing the safe side wiring with at least one layer of shielding completely along the length ... | 02/28/2006 |
| 6972936 | Pre-emptive circuit breaker with arc fault and fault lockout short circuit protection Fault abatement circuit breaker for providing protection of critical loads. The circuit breaker provides both arc fault protection and fault lockout protection in one integrated circuit breaker. The fault lockout protection reduces the risk of short circuit damage b... | 12/06/2005 |
| 6937450 | Grounded isolation system A system for electrically isolating and indicating electrical isolation of a machine including a plurality of relays which cooperate to, when electrical isolation is selected, ground voltage input lines to the machine thereby ensuring that no power is provided to th... | 08/30/2005 |
| 6856498 | Ground fault circuit interrupter with indicator lamp and protective circuit powered from hot bus bar of interrupting contacts An AC power line protection device which includes a protection circuit which guards against miswiring also has an indicator lamp which lights when the device is in the tripped condition and turns off when the device is reset. If the device is miswired after having b... | 02/15/2005 |
| 6813125 | Secondary ground fault protected luminous tube transformer A transformer assembly and method for powering a load with a secondary fault protected isolated secondary. The fault fault path is isolated from ground allowing voltage detection of faults and the return terminal is isolated from the midpoint for multiple load conne... | 11/02/2004 |
| 6744254 | Breaker failure annunciator system An annunciation system which will detect the majority of failed breakers and indicate to the consumer when a breaker needs to be replaced, but does not put the consumer in an emergency situation where critical loads have lost power. The annunication system provides ... | 06/01/2004 |
| 6690565 | Method and apparatus for neutralizing stray current impulses The attenuation of the stray current impulse limits the capacitive leakage. The value of the inductance, coupled to the parasitic capacitance of the charge, creates a reactive filter effect. Since the effect is reactive, the impulse energy is not absorbed... | 02/10/2004 |
| 6590753 | Ground fault circuit interrupter with indicator lamp powered from hot bus bar of interrupting contacts An AC power line protection device which includes miswiring protection has an indicator lamp which lights when the device is in the tripped condition and turns off when the device is reset. If the device is miswired after having been wired properly, the i... | 07/08/2003 |
| 6587319 | Ground fault circuit interrupter with indicator lamp An AC power line protection device which includes miswiring protection has an indicator lamp which lights when the device is in the tripped condition and turns off when the device is reset. If the device is miswired after having been wired properly, the i... | 07/01/2003 |
| 6437700 | Ground fault circuit interrupter A signaling system employing indicator lamp means and an audible alarm is employed to remind a user to periodically test his GFCIs and to provide information regarding the status of the GFCI. The power lines that supply the GFCI with power are also couple... | 08/20/2002 |
| 6278381 | Fault condition protective device for aircraft fuel gauging system A fault protective device (48) for limiting the maximum current and voltage applicable to electronic components and wiring (26, 30) located in the fuel tank (10) of an aircraft. Particularly, a fuel gauging system circuit (18) extends from a generator (20... | 08/21/2001 |
| 6252365 | Breaker/starter with auto-configurable trip unit A combination circuit breaker/motor starter includes a circuit breaker trip unit having a microprocessor and at least one removably connectable contactor or other functional module. The functional module is encoded with an identifier, such that the microp... | 06/26/2001 |
| 6108180 | Multi-grounded neutral electrical isolation between utility secondary low-voltage power service and high-voltage transmission structures A multi-grounded neutral electrical isolation system for a personal-communication-system cell site consists of two standard distribution transformers separated by a distance greater than the zone of influence corresponding to the maximum expected ground p... | 08/22/2000 |
| 5818672 | Ground loop current suppressor Apparatus and process are provided for suppressing interference caused by ground loop currents associated with two A.C. power-line operated electrical/electronic equipment units, such as an audio source and an amplifier, where typically the ground loop in... | 10/06/1998 |
| 5793591 | Stray voltage reduction device Stray voltage reduction system for reducing electrical shocks to livestock in a farm and similar building wherein the system senses a voltage between first and second components, such as metal stall stanchion and metal water trough, of a livestock enclosu... | 08/11/1998 |
| 5781386 | Low level ground conditioning (gcl) The present invention relates to suppressing transient impulses in a power distribution system and more particularly to a device and method for suppressing transient impulses at frequencies which exceed the power frequencies while maintaining an acceptabl... | 07/14/1998 |
| 5699219 | Ground fault current limiter and method of limiting ground fault current A ground fault current limiter, in which reactors are connected in series to a neutral point for compensating for capacitances to ground of a power switches capable of turning ON/OFF at a high speed are connected in parallel with respective reactors, occu... | 12/16/1997 |
| 5666255 | Transformerless conditioning of a power distribution system A transformerless conditioner of a power distribution system consists of an electronically enhanced filter (EEF) for suppression of transient impulses on the power line and neutral line, and a transformerless ground conditioner for suppression of transien... | 09/09/1997 |
| 5420740 | Ground fault circuit interrupter with immunity to wide band noise In a ground fault circuit interrupter in which it was found that wide band noise induced by load transients is rectified by an op-amp in the detector circuit, false trips due to the wide band noise are eliminated by only comparing the output of the amplif... | 05/30/1995 |
| 5187865 | Method of coupling lf signals by means of power line communications coupler A coupler providing coupling for power line communications between the power lines carrying different phases of the power. The coupler engages an ordinary wall outlet such as a 220 volt outlet and includes a receptacle for a 220 volt plug. Internally, the... | 02/23/1993 |
| 4816956 | Stray voltage reduction apparatus Stray voltage reduction apparatus for installation in an electrical power system to complete a path of electrical continuity between a primary neutral of a power distribution transformer and a grounding conductor at a service entrance, the primary neutral... | 03/28/1989 |
| 4780622 | Apparatus for reducing stresses that initiate restrike of breakers in disconnecting capacitor banks Re-strike in the circuit breaker of a capacitive load applied across an AC voltage power supply is reduced or avoided by connecting across the capacitor bank a tuned discharge circuit. The tuned discharge circuit includes a transformer with a primary conn... | 10/25/1988 |
| 4729052 | Supervisory system for impedance-earthed power systems A device for continuous supervision of the attenuation (d), dissymmetry (k) and mismatch (v) system parameters in impedance earthed power systems. The parameters are calculated from the circle diagram uEN=f(v), i.e., the relative neutral point voltage as ... | 03/01/1988 |
| 4686614 | Reduced EMI noise in switched-mode power supply A grounded capacitor in a switched-mode power supply provides AC line EMI filtering, reduced current leakage, and high voltage isolation. The capacitor is coupled between an AC rectifier circuit and the controlled switching devices of the power supply to ... | 08/11/1987 |
