Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7132833 | System for detecting defective battery packs An electrical cabinet for an uninterruptibe power supply (UPS) system includes universal slots that can receive power modules, battery packs, or chargers. The back plane of the slot has connector terminals for battery packs and power modules. The cabinet can be easi... | 11/07/2006 |
| 7129822 | Devices for detecting the presence of a source of power An apparatus is provided that includes an uninterruptible power supply (UPS) configured to be connected to a power distribution network. A communications circuit is also provided. The communications circuit is operatively associated with the UPS and operative to gen... | 10/31/2006 |
| 6906933 | Power supply apparatus and methods with power-factor correcting bypass mode A power supply apparatus, such as an uninterruptible power supply, includes an AC input configured to be coupled to an AC power source and an AC output. The apparatus also includes an AC/DC converter circuit, e.g., a boost rectifier circuit, with an input coupled to... | 06/14/2005 |
| 6856524 | Power factor corrected UPS with improved connection of battery to neutral An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for connecting t... | 02/15/2005 |
| 6819576 | Power conversion apparatus and methods using balancer circuits A power conversion apparatus, such as an uninterruptible power supply (UPS), includes an input port, an output port, and first and second busses. An output circuit, for example, a half-leg inverter, is coupled to the first and second busses and to the output port an... | 11/16/2004 |
| 6753622 | Uninterruptible power supply systems and methods using rectified AC with current control An uninterruptible power supply (UPS) system includes an AC input port, a DC input port, and an output port configured to be connected to an AC load. A rectifier circuit is coupled to the AC input port, and a power transfer control circuit is coupled to the rectifie... | 06/22/2004 |
| 6724596 | Hysteretic current control method and an uninterruptible power supply using same Presented is a control system and method for minimizing the adverse affects resulting from conventional hysteretic current control of power inverters, and an uninterruptible power supply using same. The system of the present invention uses control circuitry for moni... | 04/20/2004 |
| 6661678 | Power factor corrected UPS with improved connection of battery to neutral and methods of operation thereof An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for c... | 12/09/2003 |
| 6629247 | Methods, systems, and computer program products for communications in uninterruptible power supply systems using controller area networks Modules included in a UPS system can communicate over a Controller Area Network using messages having separate fields within an arbitration field. In particular, the separate fields can be separate priority fields, separate module identifier fields, and s... | 09/30/2003 |
| 6605879 | Battery charger control circuit and an uninterruptible power supply utilizing same A charging control circuit for severe battery conditions and an uninterruptible power supply (UPS) system including same are presented. The charging control circuit utilizes both hardware and microprocessor control to allow the UPS to start with depleted ... | 08/12/2003 |
| 6599657 | Battery pack housing and battery pack and power supply device incorporating the same A battery pack includes a housing having first and second shell portions. The first shell portion includes a first base wall and a plurality of upstanding first side walls extending from the first base wall. The first base wall and the first side walls de... | 07/29/2003 |
| 6549440 | AC power supply apparatus and methods providing output control based on estimated instantaneous reactive power An AC power supply, e.g., an uninterruptible power supply (UPS), includes an output, a reference signal generator circuit operative to generate a reference signal representative of a desired voltage waveform at a node connected to the output, a power dete... | 04/15/2003 |
| 6535100 | Insulated transformer foil windings with breakouts and methods for forming the same Winding assemblies for use in transformers include one or more foil strips and insulation covers arranged to provide electrically insulated winding and breakout portions. The winding assemblies may be constructed so as to meet creepage distance and other ... | 03/18/2003 |
| 6515883 | Single-stage power converter and an uninterruptible power supply using same Presented is a single-stage power converter topology allowing for power factor correction during operation. The topology utilizes an integration of Cuk converter and single-ended primary inductance converter (SEPIC) topologies to provide AC-to-AC, AC-to-D... | 02/04/2003 |
| 6486399 | Pole mount cabinet and method for assembling the same A pole mount cabinet for housing and supporting an article on a pole includes a housing having a rear wall and defining a chamber. The housing defines a rear opening in the rear wall. A mounting and support framework is adapted to be secured to the pole a... | 11/26/2002 |
| 6462961 | Component housing assembly having universal mounting capability and mounting bracket for use therewith Presented is a component housing assembly having universal mounting capability provided by a universal mounting bracket and a housing having a plurality of mounting holes to accommodate the attachment of the bracket in multiple configurations. Specificall... | 10/08/2002 |
| 6418024 | Heat sink apparatus and method of attaching the heat sink apparatus to a device A heat sink apparatus for drawing heat from one or more devices and a method of attaching such a heat sink to one or more devices is provided. The heat sink includes a mounting surface, which draws heat into the heat sink where it is dissipated by fins. T... | 07/09/2002 |
| 6400586 | Power factor corrected UPS with improved connection of battery to neutral An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for c... | 06/04/2002 |
| 6396170 | Method and apparatus for coordinating uninterruptible power supply modules to provide scalable, redundant power Presented is a modular uninterruptible power supply system utilizing common power modules, and providing redundant coordinated control thereof. The system and method of the instant invention provides identical control logic within each of the individual p... | 05/28/2002 |
| 6391489 | Battery terminal jumper clip A battery terminal jumper clip is presented that is capable of providing series battery connection between adjacent batteries in a battery stack useful for an uninterruptible power supply. The battery terminal jumper clip accommodates tab type terminal co... | 05/21/2002 |
| 6374460 | Multi-function handle and modular chassis incorporating same Provided is a multi-function, single-piece handle and modular electronic component incorporating same, and a method of inserting and removing the handle from the modular electronic component. The unitary structure of the handle includes insertion and extr... | 04/23/2002 |
| 6356471 | Dynamic feedback adaptive control system and method for paralleling electric power sources and an uninterruptible power supply including same A connectionless paralleling and load sharing system and method for power sources are presented. The invention provides a dynamic feedback adaptive control system that enables proper load sharing among paralleled power sources without the need for interco... | 03/12/2002 |
| 6356284 | Operating system-independent graphical user interface with sliding panel Systems, methods and computer program products are provided for displaying a graphical user interface (GUI) within a display device of a computer, wherein GUI functions are provided independently of the computer operating system. GUI controls are configur... | 03/12/2002 |
| 6348782 | Uninterruptible power supply systems, voltage regulators and operating methods employing controlled ferroresonant transformer circuits An uninterruptable power supply system for producing an AC voltage from at least one of a DC power source or an AC power source includes an input terminal configured to receive an AC voltage from an AC power source, and an inverter operative to produce an... | 02/19/2002 |
| 6330176 | Multi-input power transfer and uninterruptible power supply apparatus and methods of operation thereof A power transfer apparatus includes a first switch operative to couple and decouple a first AC power source to and from an AC power bus responsive to a first control signal and a second switch operative to couple and decouple a second AC power source to a... | 12/11/2001 |
| 6314007 | Multi-mode power converters incorporating balancer circuits and methods of operation thereof A power converter includes first and second voltage busses and a neutral bus. A first switching circuit, e.g., a rectifier circuit, is operative to selectively couple an input node thereof to the first and second voltage busses. A balancer circuit is oper... | 11/06/2001 |
| 6310783 | Modular method and apparatus for building an uninterruptible power system (UPS) An electrical cabinet or chassis for an uninterruptible power system (UPS system) includes universal bays or slots that can receive either power modules or battery backs. The back plane of the slot has separate connector terminals for battery packs and po... | 10/30/2001 |
| 6307763 | Twelve-pulse rectifiers including separate six-pulse controllers and methods of controlling same Twelve-pulse rectifiers include a first controller that controls a first six-pulse rectifier, a second controller that controls a second six-pulse rectifier and a data network that couples the first controller and the second controller to exchange data th... | 10/23/2001 |
| 6295216 | Power supply apparatus with selective rectifier harmonic input current suppression and methods of operation thereof A power supply apparatus includes an AC input port and a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port. The apparatus further includes a selective ha... | 09/25/2001 |
| 6295215 | AC power supply apparatus with economy mode and methods of operation thereof A power supply apparatus includes an AC input port, an output port, and a bypass circuit that couples the AC input port to the output port. An AC/DC converter circuit, e.g., a rectifier circuit, produces a DC voltage from an AC input voltage at the AC inp... | 09/25/2001 |
| 6292379 | Distributed internal fault bypass in a modular uninterruptible power supply A modular uninterruptible power supply is presented having multiple power modules installed therein. Each of the individual power modules contains an internal bypass circuit sized for its particular power module. Preferably internal bypass circuitry is si... | 09/18/2001 |
| 6266260 | Inverter having center switch and uninterruptible power supply implementing same Presented is a center switching circuit and an inverter and an uninterruptible power supply (UPS) utilizing same. The center switching circuit selectively enables and disables power flow to and from the bus capacitors of an inverter or UPS. As such, the c... | 07/24/2001 |
| 6262899 | Power factor corrected UPS maintaining neutral integrity and methods of operation thereof An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for c... | 07/17/2001 |
| 6219246 | Heat sink apparatus A heat sink apparatus for drawing heat from one or more devices and a method of attaching such a heat sink to one or more devices is provided. The heat sink includes a mounting surface, which draws heat into the heat sink where it is dissipated by fins. T... | 04/17/2001 |
| 6218744 | Uninterruptible power supply and ferroresonant transformer for use therewith A line-interactive single conversion uninterruptible power supply (UPS) utilizing a multiple tapped ferroresonant transformer and a square wave PWM inverter is presented. During normal utility line operation, the line voltage is not modified in any way, e... | 04/17/2001 |
| 6201720 | Apparatus and methods for space-vector domain control in uninterruptible power supplies Uninterruptible power supplies (UPSs), power conversion apparatus and power conversion methods are provided which may improve phase regulation of polyphase AC voltages in the presence of load imbalances. According to one embodiment, a UPS includes a DC vo... | 03/13/2001 |
| 6160722 | Uninterruptible power supplies with dual-sourcing capability and methods of operation thereof An uninterruptible power supply (UPS) includes an AC source port configured to connect to an AC power source, a DC source port configured to connect to a DC power source and a load port configured to connect to a load. A rectifier circuit is operative to ... | 12/12/2000 |
| 6121756 | Charger An uninterruptible power supply (UPS) comprises a low voltage converter (02); a coupled inductor (60) comprising a first inductor (63) coupled to the battery, a second inductor (61) coupled to a first output terminal of a rectifier, and a third inductor (... | 09/19/2000 |
| 6069412 | Power factor corrected UPS with improved connection of battery to neutral An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative high voltage (HV) rails. A simple circuit is utilized for c... | 05/30/2000 |
