GB1308525A - Lamp ballast circuit - Google Patents

Lamp ballast circuit

Info

Publication number
GB1308525A
GB1308525A GB2080070A GB2080070A GB1308525A GB 1308525 A GB1308525 A GB 1308525A GB 2080070 A GB2080070 A GB 2080070A GB 2080070 A GB2080070 A GB 2080070A GB 1308525 A GB1308525 A GB 1308525A
Authority
GB
United Kingdom
Prior art keywords
lamp
impedance
capacitative
ballast circuit
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2080070A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of GB1308525A publication Critical patent/GB1308525A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/391—Controlling the intensity of light continuously using saturable magnetic devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1308525 Lamp ballast circuit XEROX CORP 30 April 1970 [1 May 1969] 20800/70 Heading H2H In a lamp ballast circuit of the type in which the series impedance with the lamp is capacitative, the impedance is varied by means of a variable inductor in series with the capacitance, the circuit being characterized in that the total impedance is always effectively capacitative. The voltage supply for a metal vapour gas discharge lamp 3 is provided by an auto transformer 1. The ballast circuit comprises a unit 2 whose impedance is always effectively capacitative. Unit 2 comprises a capacitor 11 in series with a saturable core reactor 16, which is shunted by an inductor 23 which ensures that unit 2 always has a net capacitative impedance. The saturable core reactor 16 may be controlled by means of a photo-cell 21 monitoring the light output of the lamp. Alternatively the lamp may be fed by a fixed output transformer, and the saturable core reactor may be replaced by an ordinary variable inductor.
GB2080070A 1969-05-01 1970-04-30 Lamp ballast circuit Expired GB1308525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82075769A 1969-05-01 1969-05-01

Publications (1)

Publication Number Publication Date
GB1308525A true GB1308525A (en) 1973-02-21

Family

ID=25231643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2080070A Expired GB1308525A (en) 1969-05-01 1970-04-30 Lamp ballast circuit

Country Status (7)

Country Link
US (1) US3599037A (en)
BE (1) BE749784A (en)
BR (1) BR7017881D0 (en)
DE (1) DE2021380A1 (en)
FR (1) FR2041785B1 (en)
GB (1) GB1308525A (en)
NL (1) NL7006152A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961236A (en) * 1975-02-07 1976-06-01 Xerox Corporation Constant power regulator for xerographic fusing system
US4009387A (en) * 1975-05-27 1977-02-22 Esquire, Inc. Automatic energy control lighting system with automatically variable dc source
US4190795A (en) * 1977-09-09 1980-02-26 Coberly & Associates Constant intensity light source
DK508477A (en) * 1977-11-16 1979-05-17 Grosman A A S CONTROL CIRCUIT FOR AN AC POWERED CHARGE LAMP
US4286207A (en) * 1980-04-14 1981-08-25 Westinghouse Electric Corp. High-power AC voltage stabilizer
JPS5740277A (en) * 1980-08-23 1982-03-05 Ricoh Co Ltd Exposure control device of copying machine
US4463284A (en) * 1981-07-28 1984-07-31 Konishiroku Photo Industry Co., Ltd. Method and apparatus for controlling luminous intensity of fluorescent lamp of reproducing apparatus
DE3149993A1 (en) * 1981-12-17 1983-06-30 CEAG Licht- und Stromversorgungstechnik GmbH, 4600 Dortmund CIRCUIT ARRANGEMENT FOR A DISCHARGE LAMP
US4501994A (en) * 1982-09-02 1985-02-26 Cooper Industries, Inc. Ballast modifying device and lead-type ballast for programming and controlling the operating performance of an hid sodium lamp
CA1203561A (en) * 1982-09-02 1986-04-22 Robert J. Spreadbury Ballast modifying device and lead-type ballast for programming and controlling the operating performance of an hid sodium lamp
US4965492A (en) * 1988-11-18 1990-10-23 Energy Technology, Inc. Lighting control system and module
DE4025939C2 (en) * 1990-08-16 1994-03-24 Diehl Gmbh & Co Circuit arrangement for starting and controlling the brightness of a fluorescent lamp during operation
US5345150A (en) * 1992-03-26 1994-09-06 Stocker & Yale, Inc. Regulating light intensity by means of magnetic core with multiple windings
US5239239A (en) * 1992-03-26 1993-08-24 Stocker & Yale, Inc. Surrounding a portion of a lamp with light regulation apparatus
US6225757B1 (en) 2000-05-19 2001-05-01 Magnetek Corp. Combination MH/HPS ballast
ES2274675B1 (en) * 2004-12-20 2008-04-16 Universidad De Oviedo SYSTEM FOR SOFT IGNITION AND POWER CONTROL IN ELECTRONIC BASKETS.
US8773231B2 (en) 2012-03-09 2014-07-08 Raytheon Company Multiphase power converters involving controllable inductors
US9263961B2 (en) 2013-07-23 2016-02-16 Raytheon Company Wide input DC/DC resonant converter to control reactive power

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA638969A (en) * 1962-03-27 Popa John Starting and operating circuit for arc discharge device
US2829314A (en) * 1954-08-30 1958-04-01 Ward Leonard Electric Co Dimming of fluorescent lamps
GB977639A (en) * 1961-03-06 1964-12-09 Philips Electronic Associated Improvements in or relating to circuit arrangements for adjusting the power consumption of gaseous and/or vapour-discharge lamps
US3222572A (en) * 1962-07-23 1965-12-07 Gen Electric Apparatus for operating electric discharge devices
US3360650A (en) * 1964-02-12 1967-12-26 American Cyanamid Co Apparatus for ultraviolet source stabilization in exposure testing

Also Published As

Publication number Publication date
BR7017881D0 (en) 1973-01-25
NL7006152A (en) 1970-11-03
DE2021380A1 (en) 1970-11-12
US3599037A (en) 1971-08-10
BE749784A (en) 1970-10-30
FR2041785B1 (en) 1973-02-02
FR2041785A1 (en) 1971-02-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees