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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7369022 | Auxiliary switch sub-assembly and electrical switching apparatus employing the same An auxiliary switch sub-assembly is provided for a telecommunication system circuit breaker including a housing having an opening, separable contacts inside the housing, and an operating mechanism operating the separable contacts between open and closed positions. T... | 05/06/2008 |
| 7355301 | Load control receiver with line under voltage and line under frequency detection and load shedding A method for detecting line under voltage (LUV) events and initializing load shedding of loads located near the electrical disturbance without customer and utility intervention. In one example embodiment, the LUV detection system samples a primary voltage source at ... | 04/08/2008 |
| 7347722 | Meter socket assembly A meter socket assembly comprising a meter jaw assembly and an extended bus bar for contact with a meter blade of a watt hour meter. The meter jaw assembly further comprises a meter jaw and a jaw spring guide that are mounted together by a fastening device to the ex... | 03/25/2008 |
| 7326964 | Light emitting diode package with protective function against electrostatic discharge An LED package having an MEMS switch operated by electrostatic force, capable of continuously protecting an LED from excessive current due to electrostatic discharge. The LED package includes a submount with first and second electrode patterns formed thereon; an LED... | 02/05/2008 |
| 7319574 | Arc fault detection apparatus, method and system for an underground electrical conductor A non-invasive underground arc fault detection apparatus is for an underground electrical conductor. The apparatus includes an electric circuit having an opening for admitting the electrical conductor therethrough. The electric circuit includes one or two transducer... | 01/15/2008 |
| 7319373 | Electrical switching apparatus and terminal housing therefor An auxiliary switch terminal housing is provided for a telecommunication system circuit breaker including an enclosure, separable contacts inside the enclosure, line and load terminals in electrical communication with the separable contacts, an operating mechanism f... | 01/15/2008 |
| 7301742 | Method and apparatus for accessing and activating accessory functions of electronic circuit breakers An electronic trip unit for a circuit breaker includes a programmed microprocessor and a module plug in removable signal communication with the microprocessor. The module plug includes a program identifier. The microprocessor recognizes the program identifier and ac... | 11/27/2007 |
| 7253996 | Method and arc fault circuit interrupter employing a hysteresis value for compressor rumble An arc fault detection circuit collects samples of sensed current, determines a peak current value from the samples for each line cycle, determines a hysteresis value for a compressor load as a function of differences between the peak current values, and generates a... | 08/07/2007 |
| 7232968 | Illuminated in-line controller This portable device relates to an in-line illuminated switch. The switch has a soft glowing light which is visible in a darkened room. Elderly people remove their eyeglasses when resting, and the soft glowing light locates the switch when light is required at bedsi... | 06/19/2007 |
| 7218998 | System and method for limiting power demand in an energy delivery system An intelligent demand controller protects the local customer premises supply transformer from overload and senses conditions on the transformer. The intelligent demand control system utilizes a communications network with a plurality of load control units having a u... | 05/15/2007 |
| 7209048 | Device for monitoring and alerting of a power disruption to electrical equipment or an appliance The present invention is a simple, inexpensive and reliable device for monitoring and alerting of a power disruption to an appliance or a piece of equipment. An audible and/or visual alarm may be generated in the event that a specific or a piece of electrical equipm... | 04/24/2007 |
| 7199491 | Intelligent circuit breaker module A replaceable circuit breaker module has a housing for supporting and enclosing elements of the module, a circuit breaker mounted in the housing in a manner that an action of installing the module connects the breaker to bridge an incoming and an outgoing conductor,... | 04/03/2007 |
| 7135954 | Circuit breaker for electric coupling device An electric coupling device includes a housing having a front socket opening and a rear chamber formed by two side wall. Two prongs are disposed in the socket opening of the housing and each has a free end extended out of the housing, and two conductor terminals are... | 11/14/2006 |
| 7133272 | Solid-state replacement for locomotive relay A solid-state direct replacement relay assembly, and a method for installing and using it to replace the mechanical-style relays in the electrical cabinets of a locomotive. Solid-state relay components are substituted to upgrade locomotive relay systems, and to impr... | 11/07/2006 |
| 7095598 | Fault detection apparatus and method There is provided an apparatus for producing a trip signal to activate a circuit breaker in an alternating current power line, said apparatus comprising: a sensing circuit operable to sense values representing: a phase difference between current and voltage in said ... | 08/22/2006 |
| 7075767 | Fault current limiting system and method A fault current limiting system includes switching means for providing a fast switching operation; a parallel current path comprising a limiting fuse; and a switching system to automatically replace a blown set of fuses with an unblown set of fuses after a fault cur... | 07/11/2006 |
| 7012795 | Electromagnetic circuit breaker assembly having reverse polarity protection An electromagnetic circuit breaker assembly, comprising at least one circuit breaker, is provided with a reverse polarity circuit that reduces the voltage presented to the terminals of the circuit breaker to which it is electrically connected when the terminals are ... | 03/14/2006 |
| 6992872 | Circuit breaker incorporating fault lockout protection A method of protecting multiple feeder circuits fed from a shared electrical distribution system is provided. The method includes providing a bypass line, providing bypass switches in the bypass line, providing a fault lockout protection controller coupled to the by... | 01/31/2006 |
| 6958895 | Protection device with a contact breaker mechanism The present invention is directed to an electrical wiring protection device including a housing assembly including at least one receptacle, the at least one receptacle being configured to receive plug contact blades inserted therein. The housing assembly includes a ... | 10/25/2005 |
| 6842324 | Apparatus and method for controlling movement of an object through a medium using a magnetic field Apparatus and method for controlling movement of an object through a medium using a magnetic field by combining the magnetic field of a primary electromagnetic coil having a central axis with the magnetic fields of a plurality of secondary electromagnetic coils havi... | 01/11/2005 |
| 6784526 | Integrated circuit device module According to the present invention, for a module in which a plurality of integrated circuit devices are mounted in parallel, the inductance generated by the unit length of a branched signal line on a motherboard is so set that it is smaller for a branched signal lin... | 08/31/2004 |
| 6738246 | Electrical circuit breaker for protecting against overcurrents The invention relates to a combination of a microrelay switch (1) switching off small overcurrents, and a short-circuit current limiter, for example a fuse link, a PTC thermistor 16 or a power breaker, for limiting or switching of large overcurrents. | 05/18/2004 |
| 6663405 | Disconnect watthour meter socket adapter A housing carries an electrical disconnect switch having movable contacts. A cover is mounted on the housing and has an opening allowing access to a control lever of the disconnect switch. Electrical conductors are connected to the disconnect switch withi... | 12/16/2003 |
| 6633471 | Overcurrent protection circuit, electric leakage protection circuit for an electric apparatus An overcurrent/leakage protection circuit installed in an electric socket or the like for over current/electric leakage protection, which includes a relay, a SCR (silicon controlled rectifier) which controls the relay, a trigger circuit which triggers the... | 10/14/2003 |
| 6628494 | Protective device and system A multi-pole protective device and system for electrical power transmission and distribution systems is provided that operates a multi-pole tripping system at ground level from a line-potential tripping device contained within each pole of the multi-pole ... | 09/30/2003 |
| 6580344 | Ground fault interruption receptacle A new and improved type of ground fault interruption receptacle is mainly consists of an upper housing, a middle supporter and a lower holder. Two sets of female power-output socket 5, 6, a simulation test button (i.e. test button for fault detecting) and... | 06/17/2003 |
| 6570749 | Over-current and thermal protection device An over-current and thermal protection device adaptable for use as an electrical interrupt and in a battery environment. The protection device has a pair electrical conductors, an electrically conductive resilient switch member engageable in contact with ... | 05/27/2003 |
| 6560085 | Circuit breaker including positive temperature coefficient resistivity element and current limiting element An apparatus and method for interrupting the flow of electrical current in a line is disclosed. The invention provides for better limitation of current than can be achieved in the prior art. With effective current limitation, the magnetic force generated ... | 05/06/2003 |
| 6515569 | Circuit breaker with bypass conductor commutating current out of the bimetal during short circuit interruption and method of commutating current out of bimetal The high transient current sustained by arcing during opening of the main contacts of a miniature circuit breaker is commutated out of the bimetal by deflection of the bimetal in response to the overcurrent to close secondary contacts on the free end of t... | 02/04/2003 |
| 6472971 | Circuit breaker A circuit breaker includes main circuit contact shoes disposed in a circuit breaker case and urged by a contact spring, a contact opening and closing mechanism located above the contact shoes and including an opening and closing lever, a toggle link, an o... | 10/29/2002 |
| 6459707 | Relay multiplexer system and method for prevention of shock hazard A relay multiplexing system which provides improved safety from hazardous voltage conditions. The relay multiplexing system comprises a relay multiplexer module and a terminal block which connects to the relay multiplexer module. The relay multiplexer mod... | 10/01/2002 |
| 6442011 | Flux concentration adjustment mechanism and method for hall effect sensors and circuit breaker using same A Hall effect sensor is transported to and away from a conductor to vary the sensitivity range of the sensor to current flow in the conductor. The device comprises a bracket supported on the conductor which holds a jack screw. At the lower end of the jack... | 08/27/2002 |
| 6392422 | Monitoring insulation and fault current in an A/C current network to provide load shutoff whenever differential current exceeds a certain response value A method and device for monitoring insulation and fault current in an electrical alternating current network. The differential current formed by vectorial addition is detected between at least two network conductors. Load-cut occurs when the differential ... | 05/21/2002 |
| 6370001 | Circuit protector with self-test circuit A combined ground fault and arc fault detector includes interrupting contacts which are opened when either an arc fault or a ground fault is detected. The detector includes a test circuit which creates a simulated fault and momentarily de-energizes the co... | 04/09/2002 |
| 6356426 | Residential circuit breaker with selectable current setting, load control and power line carrier signaling In one aspect of the present invention, a residential circuit breaker is presented. The residential circuit breaker comprises an electronic residential circuit breaker having a selectable current rating which permits the user to easily set and reset the c... | 03/12/2002 |
| 6356422 | Circuit breaker communication and control system A circuit breaker system 10 (FIG. 1) using electronic trip units 35 is disclosed. The electronic trip units 35 are coupled to a communications bus 30 whereby the electronic trip units 35 can be reconfigured, controlled, and/or monitored by a central compu... | 03/12/2002 |
| 6310753 | Low impedance magnetic latch tripping scheme A circuit breaker system (100) providing a low impedance magnetic latch tripping scheme. The circuit breaker system (100) includes a trip unit (310) coupled to a switch unit (108). Trip unit (310) is coupled to an electrical circuitry and utilizes a curre... | 10/30/2001 |
| 6236548 | Method of discriminating between an internal arc and a circuit-breaking arc in a medium or high voltage circuit breaker The method relates to discriminating between an internal arc and a circuit-breaking arc established in the enclosure of a circuit breaker in a bay of a medium or high voltage metal-clad substation. The appearance of an internal arc is detected by a protec... | 05/22/2001 |
| 6172863 | Phase control switching system A phase control switching system for controlling opening and closing timings of a power switching device to suppress the occurrence of an exciting rush current or a make-and-break surge voltage which is severe to system equipment such as a transformer, a ... | 01/09/2001 |
| 6157527 | Load center monitor and digitally enhanced circuit breakers system for electrical power lines A method of communicating data with a plurality of electronic circuit breakers operatively connected in a power distribution system is disclosed and claimed herein. Each circuit breaker includes a communication port coupled to a network. The method compri... | 12/05/2000 |
