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Class Information
Number: 315/137
Name: Electric lamp and discharge devices: systems > Polyphase a.c. supply
Description: Systems provided with (1) means for supplying electrical energy from a source of polyphase alternating currents to one or more load devices, or (2) a source of polyphase alternating current and means for converting the polyphase alternating currents to current of another character which is supplied to one or more load devices.

Sub-classes under this class:

Class Number Class Name Patents
315/138 M phase to n phase (e.g., phase splitters) 1
315/147 Plural cathode and/or anode discharge device load 13
315/146 Plural discharge control discharge device load devices 5
315/141 Transformer in the supply circuit 15

Patents under this class:

Patent Number Title Of Patent Date Issued
8513890 Solid-state light emitting device having controllable multiphase reactive power Aug. 20, 2013
7733029 Lighting device and a lighting method for a high pressure discharge lamp Jun. 8, 2010
7276859 Three-phase electronic ballast with improved three-phase EMI filter Oct. 2, 2007
6346782 Multiple lamp ballast system Feb. 12, 2002
6078146 Centralized power reducing device, particularly for lighting installations Jun. 20, 2000
5815067 Single control wire device for HID dimming Sep. 29, 1998
5661368 Dual-voltage control for an electrical load Aug. 26, 1997
5440206 Plasma processing apparatus comprising means for generating rotating magnetic field Aug. 8, 1995
5391965 Gas discharge ignition device and method using high frequency and high power to ignite a uniform electrode surface area Feb. 21, 1995
4833577 Light source in a subdivided arrangement May. 23, 1989
4733136 Method of regulating the power of vapor discharge lamps Mar. 22, 1988
4517495 Multi-electrode plasma source May. 14, 1985
4502145 Power supply for a laser Feb. 26, 1985
4207498 System for energizing and dimming gas discharge lamps Jun. 10, 1980
4041351 Flash lamp power supply with direct energization from an AC power supply source Aug. 9, 1977

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