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| Number | Title | Issue Date |
| 8097187 | Additive for dielectric fluid A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact... | 01/17/2012 |
| 7815821 | Additive for dielectric fluid A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact... | 10/19/2010 |
| 7651641 | Vegetable oil based dielectric fluid and methods of using same In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a ... | 01/26/2010 |
| 7524440 | Method comprising additive for dielectric fluid A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact... | 04/28/2009 |
| 7160001 | Focus assembly for a track light A focus assembly for a luminaire includes a socket, having wires extending therefrom, for receiving a lamp; a mounting cup for securing the socket to the luminaire; a socket focusing mechanism for axially translating the mounting cup relative to a stationary reflect... | 01/09/2007 |
| 6973589 | Electronic communications in intelligent electronic devices An intelligent electronic device (IED) is connected to interact with a power system to provide protection, control, and/or monitoring capabilities for the power system. The device includes a power system interface circuit for communicating with the power system and ... | 12/06/2005 |
| 6949711 | Selector switch knob with lock ring assembly A locking switch includes a shaft that engages one or more electromechanical switches and a knob that is secured to the shaft such that when the knob is rotated, a rotary motion is imparted to the shaft and to the electromechanical switches engaged by the shaft. The... | 09/27/2005 |
| 6939160 | EMT rain-tight compression fittings A connector assembly includes a nut, a first member, a second member, and a third member. The connector assembly is used for coupling a conduit to an electrical device that includes a body having an end with an outer edge and a threaded exterior surface. The nut inc... | 09/06/2005 |
| 6918320 | Conduit seal packing tools A packing tool or set of tools having a handle and one packing end that is formed to perform various tasks involved with packing fiber into conduits without damaging insulation on wires in the conduits. The tools are made of a non-conductive material that has a smoo... | 07/19/2005 |
| 6911777 | Clamp-on low power isolation transformer for airfield lighting A clamp-on isolation transformer for an airfield lighting fixture in an airfield lighting system includes a first portion configured to receive a portion of a primary conductor of a primary current loop and a second portion configured to receive another portion of t... | 06/28/2005 |
| 6905638 | Vegetable oil based dielectric fluid and methods of using same In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a ... | 06/14/2005 |
| 6858172 | Current sensor supporting structure An electrical switchgear device includes a conductor, a base, and a current sensor positioned to detect current in the conductor and attached to the base using a support element. The device also includes an apparatus mounted to the base to interrupt current through ... | 02/22/2005 |
| 6852930 | Seal for cables and conduits Electrical conduits and conductors are sealed using a chamber that is configured for attachment to a conduit through which at least one conductor runs, such that the at least one conductor also runs through the chamber. A port permits access to the chamber to inject... | 02/08/2005 |
| 6847514 | Surge arrester module with bonded component stack A surge arrester includes a stack of components having at least one varistor. Each component has end faces, at least one of which is mechanically bonded to an end face of another component such that the combined components of the stack define a single, monolithic st... | 01/25/2005 |
| 6835088 | EMT rain-tight compression fittings A connector assembly includes a nut, a first member, a second member, and a third member. The connector assembly is used for coupling a conduit to an electrical device that includes a body having an end with an outer edge and a threaded exterior surface. The nut inc... | 12/28/2004 |
| 6828521 | Method for increasing insulation level in an encapsulation A switchgear assembly includes a vacuum interrupter assembly having an internal switching contact. A conductive current exchange is in electrical contact with the switching contact, and the current exchange defines an internal chamber within the current exchange. A ... | 12/07/2004 |
| 6814469 | Rotating reflector An adjustable light fixture includes a housing, a reflector assembly, and an adjustment mechanism. The housing has an external surface and an interior compartment. The reflector assembly is positioned within the interior compartment of the housing. The adjustment me... | 11/09/2004 |
| 6760206 | Current sensor supporting structure An electrical switchgear device includes a conductor, a base, and a current sensor positioned to detect current in the conductor and attached to the base using a support element. The device also includes an apparatus mounted to the base to interrupt current through ... | 07/06/2004 |
| 6726857 | Dielectric fluid having defined chemical composition for use in electrical apparatus The present invention comprises a mixture of hydrocarbons having a well-defined chemical composition that is suitable for use as a dielectric coolant in electrical equipment in general, and specifically in transformers. The dielectric coolants of the present inventi... | 04/27/2004 |
| 6697237 | Conversion of standard class a ground-fault circuit-interrupters, (GFCI), to a class a ground-fault circuit interrupter with open neutral protection The present invention concerns an improved ground fault circuit interrupt outlet. The device includes a voltage sensitive device which is capable of conducting current at a predetermined voltage. The voltage sensitive device is electrically connected betw... | 02/24/2004 |
| 6682681 | Method of fabricating a thermoplastic rubber encapsulated transformer An encapsulated transformer includes a transformer coil assembly, a rigid core insert having an upstanding portion positioned within the hollow interior of the core and a base portion on which the core rests, and a thermoplastic rubber jacket that complet... | 01/27/2004 |
| 6669351 | Airport in-pavement lighting fixture An in-pavement airport lighting fixture includes a housing, a feed-through assembly, and a threaded bolt that extends through the housing to secure the housing to a base unit. The feed-through assembly carries a lamp and positions the lamp in the housing.... | 12/30/2003 |
| 6613250 | Vegetable oil based dielectric fluid and methods of using same In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that inc... | 09/02/2003 |
| 6585917 | Dielectric fluid A dielectric fluid with improved performance in capacitors contains 65% by weight or more monobenzyltoluene. Capacitors including the dielectric fluid can have improved discharge extinction voltages at 60° C.... | 07/01/2003 |
| 6540376 | Swivel nightlight A night light which plugs directly into an electrical outlet with a rotatable housing which swivels 360° to direct light in a desired direction. The night light includes a light bulb connected to its power source in a self-contained housing. The night li... | 04/01/2003 |
| 6519129 | Surge arrester module with bonded component stack A surge arrester includes a stack of components having at least one varistor. Each component has end faces, at least one of which is mechanically bonded to an end face of another component such that the combined components of the stack define a single, mo... | 02/11/2003 |
| 6505960 | Recessed lighting fixture locking assembly A recessed lighting fixture for mounting to a ceiling includes a housing, a frame, and at least one locking assembly. The housing includes a side wall, an opening, a lip extending outwardly around at least a portion of a circumference of the opening, and ... | 01/14/2003 |
| 6504103 | Visual latching indicator arrangement for an electrical bushing and terminator An elbow terminator has a socket in which an electrical probe is disposed. The terminator is insertable onto an electrical bushing such that a tongue of the bushing is received in the socket of the terminator, and the probe of the terminator is electrical... | 01/07/2003 |
| 6498295 | Side insertion trap An invertible side insertion trap is designed to be inserted into an opening in an electrical box and to accommodate at least two different sizes of cable or wire depending on an orientation of the trap. The trap includes a base, a first arm and a second ... | 12/24/2002 |
| 6485659 | Electrical apparatus with dielectric fluid blend of polyalphaolefins and polyol esters or triglycerides The present invention comprises a mixture of hydrocarbons having a well-defined chemical composition that is suitable for use as a dielectric coolant in electrical equipment in general, and specifically in transformers. The dielectric coolants of the pres... | 11/26/2002 |
| 6404267 | High side MOSFET drive An improved circuit for activating a high side mosfet drive during a predetermined phase of the A/C cycle. The circuit includes an electronic switch which is connected to an A/C line. The switch operates between an open and closed position. Also included ... | 06/11/2002 |
| 6352655 | Vegetable oil based dielectric fluid A dielectric fluid system for use in electrical equipment comprising a dielectric fluid comprising vegetable oil and an oxidation reducing composition encased in a housing composed of a polymeric material that is substantially permeable to oxygen. The oxi... | 03/05/2002 |
| 6343873 | Lighting fixture with downlight reflector and wallwash reflector A socket spring is designed to be installed in at least two different types of reflectors. The socket spring includes a base that can be connected to a lamp socket, a first arm and a second arm. The first arm extends from the base and includes a first ben... | 02/05/2002 |
| 6338637 | Dead front system and process for injecting fluid into an electrical cable A dead front system provides fluid access to an electrical connector and cable. The dead front system includes an injection plug, a fluid access system, and a tube connected at a first end to the injection plug and at a second end to the fluid access syst... | 01/15/2002 |
| 6332785 | High voltage electrical connector with access cavity and inserts for use therewith A high voltage electrical connector (50) interconnects sources of energy, such as transformers and circuit breakers, to distribution systems and the like via a high voltage cable (37). The high voltage electrical connector (50) includes an access cavity (... | 12/25/2001 |
| 6331687 | Control method and device for a switchgear actuator A current interrupter (4) includes a current interrupting device (4) having at least one movable contact (71); an actuator (8) coupled to the movable contact (71) of the current interrupter (4); a feedback sensor (14) for monitoring movement of the actuat... | 12/18/2001 |
| 6309258 | Single pole cable connector A single-pole electrical connector includes an insulating sleeve and a retention ring positioned in the insulating sleeve. The retention ring defines an inner channel and a groove in a surface of the inner channel. The retention ring also includes a threa... | 10/30/2001 |
| 6300878 | Constant current regulator using IGBT control A constant current regulator that receives an AC input current from a source provides a constant AC current to a load. The regulator includes first, second, third, and fourth electronically controllable switches, a transformer coupled to the switches, and... | 10/09/2001 |
| 6291911 | Electrical switchgear with synchronous control system and actuator In a power distribution system, synchronizing switchgear operations with an AC voltage or current waveform can be accomplished more precisely with a closed-loop feedback, microprocessor-based motion control design. By employing a closed-loop feedback, mic... | 09/18/2001 |
| 6184459 | Vegetable oil based dielectric coolant A transformer is disclosed, including a tank housing a transformer core/coil assembly, a dielectric insulating fluid surrounding the core/coil assembly, the fluid comprising a vegetable oil, an antioxidant dissolved in the oil, and a low temperature addit... | 02/06/2001 |
