Class 307/13 - Polyphase

Subclass of Class 307 - Electrical transmission or interconnection systems
Definition: Subject matter relating to polyphase systems.
No. of patents: 19
Last issue date: 07/12/2011

Number	Title	Issue Date
7977815	Polyphase power distribution and monitoring apparatus A polyphase power distribution and monitoring apparatus having sets of outputs for each phase of power and monitors for each phase of power disposed in the housing. Each monitor provides a visible display of current for an associated phase of power and an audible al...	07/12/2011
7777365	Polyphase power distribution and monitoring apparatus A polyphase power distribution and monitoring apparatus having sets of outputs for each phase of power and monitors for each phase of power disposed in the housing. Each monitor provides a visible display of current for an associated phase of power and an audible al...	08/17/2010
7414329	Polyphase power distribution and monitoring apparatus A polyphase power distribution and monitoring apparatus having sets of outputs for each phase of power and monitors for each phase of power disposed in the housing. Each monitor provides a visible display of current for an associated phase of power and an audible al...	08/19/2008
7378754	Three-phase harmonic reduction filter for bidirectional power converters A three-phase filter has first, second, and third power source connectors and first, second, and third load connectors. A separate phase line filter is connected between each pair of power source and load connectors. Each phase line filter includes a line winding co...	05/27/2008
7368830	Polyphase power distribution and monitoring apparatus A polyphase power distribution and monitoring apparatus having sets of outputs for each phase of power and monitors for each phase of power disposed in the housing. Each monitor provides a visible display of current for an associated phase of power and an audible al...	05/06/2008
7323968	Cross-phase adapter for powerline communications (PLC) network An adapter to reduce the effects of cross phase communication between a PLC transmitter plugged into one of the L1 or L2 power lines of a home and a PLC receiver plugged into the opposite L2 or L1 power line includes a housing with one si...	01/29/2008
7170194	Configurable multiple power source system A system for supplying additional power to a module having an internal power supply, the system comprising: a module having an associated power supply, the power supply not being designed to accommodate power sharing; at least one load associated with the module, th...	01/30/2007
7071838	Coupling signals via a coupling arrangement A power supply controller has two control units for coupling to primary and secondary sides of controlled power supplies, the units being coupled via a transformer which couples signals between the units, a power supply voltage for the secondary-side unit being deri...	07/04/2006
7049921	Auto-transformer for use with multiple pulse rectifiers Zig-zag connected, phase shifting, auto-transformers that provides the inherent ability to block the flow of zero sequence currents that are associated with multiple-pulse rectifiers. The transformer coils are wound in three separate, multi-wound windings on three s...	05/23/2006
6545880	Cryogenic power distribution system for large structure Energy distribution and conversion system suitable for high-rise structures, large building complexes, factories, ships, airplanes, city blocks, etc., based on: High-Temperature Superconductors (HTS) and Cryogenic Power and Energy Conversion (CPEC) using ...	04/08/2003
6239512	Electric water heater with simplified phase conversion apparatus An electric water heater is provided with simplified phase conversion apparatus including a terminal structure having replaceable line lug portions which are wired to a single phase row of multi-pin connector sockets by single phase routing circuitry, and...	05/29/2001
5585712	Current source with supply current minimizing A set of series connected power supplies are progressively connected to a load as the voltage to the load increases. Starting with a first voltage power supply, as the load voltage increases at or to the first voltage level, a switch connects the next suc...	12/17/1996
5317299	Electromagnetic transformer A summing transformer having a core structure, first primary and secondary windings wound on the core structure for establishing a rotating electromagnetic field when the first primary winding is energized, and second primary and secondary windings wound ...	05/31/1994
5177405	Self-scanning, light-emitting device A self-scanning, light-emitting device comprises an array of cells or blocks each having a self-scanning transfer element and a light-emitting element. Turn-on state of the transfer element is transferred to the subsequent transfer element in synchronism ...	01/05/1993
4786799	Power control for cooking appliance with multiple heating units An improved electric cooking appliance with a plurality of heating units arranged in two groups, a first group adapted for energization by a first AC power signal and a second group adapted for energization by a second AC power signal, 180° out of phase ...	11/22/1988
4725739	AC branch power distribution filter An AC branch power distribution filter is provided for supplying AC power to a plurality of different load devices from a common external AC power source that eliminates the need for a separate protection device at each power outlet with the load devices....	02/16/1988
4481501	Transformer arrangement for coupling a communication signal to a three-phase power line A communication signal is coupled simultaneously to all three phases of a three-power line through a three-phase open delta transformer with the communication signal being applied across the low voltage pair of windings....	11/06/1984
4214171	Plural phase pulsed power supply A method and apparatus for supplying electrical power to plural phased loads from a single power source at staggered times, whereby the maximum energy demand upon the power source is reduced. A phase-divider creates synchronizing pulses defining the start...	07/22/1980
3991359	Power regulation system A system for providing a desired energizing current, according to a reference current signal, to a load or group of load elements. Three phase energizing current is rectified by a plurality of controlled switching devices such as thyristors, and apparatus...	11/09/1976

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Class 307/13 - Polyphase