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GB1254892A - Ignition circuits for high pressure mercury lamps - Google Patents

Ignition circuits for high pressure mercury lamps

Info

Publication number
GB1254892A
GB1254892A GB281069A GB281069A GB1254892A GB 1254892 A GB1254892 A GB 1254892A GB 281069 A GB281069 A GB 281069A GB 281069 A GB281069 A GB 281069A GB 1254892 A GB1254892 A GB 1254892A
Authority
GB
United Kingdom
Prior art keywords
lamp
voltage
high pressure
transformer
pressure mercury
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
GB281069A
Inventor
Erhard Strauch
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Publication of GB1254892A publication Critical patent/GB1254892A/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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/231—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for high-pressure lamps

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1,254,892. Central systems for operating high pressure mercury lamps. HONEYWELL Inc. 17 Jan., 1969 [20 Jan., 1968], No. 2810/69. Heading H2H. A control means for operating a high pressure mercury lamp comprises means whereby starting pulses are repeatedly applied to the lamp for ignition thereof during such times as the lamp is not ignited. A high pressure mercury vapour lamp QL is supplied from an A.C. source 1-4 by way of a transformer T1 and a rectifier bridge GB, the output of which is smoothed by capacitors C1-C3, the normal running current for the lamp passing through the secondary winding L2 of a transformer T2. The primary winding L1 of this transformer is connectedwhen a thyristor Q1 is made conductive-to a voltage doubling circuit CR3, CR4, C5, C6, R9, R10 which is supplied from a secondary winding on the transformer T1. Control of the thyristor Q1 is by way of a relaxation oscillator circuit comprising a unijunction transistor Q2. A voltage proportional to that across the lamp QL is taken from a voltage divider R5, R6 and applied to the emitter of the transistor Q2. The voltage applied to the bases of the transistor Q2 is derived from a voltage divider R2, R3. When the lamp is not ignited the voltage across the lamp is high and causes oscillation of the oscillatory circuit such that triggering pulses are applied to the thyristor Ql and hence ignition pulses are repeatedly applied to the lamp QL. When the lamp ignites, the voltage thereacross falls to a value incapable of sustaining the oscillations and thus terminating the generation of ignition pulses for the lamp.
GB281069A 1968-01-20 1969-01-17 Ignition circuits for high pressure mercury lamps Expired GB1254892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0065083 1968-01-20

Publications (1)

Publication Number Publication Date
GB1254892A true GB1254892A (en) 1971-11-24

Family

ID=7162996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB281069A Expired GB1254892A (en) 1968-01-20 1969-01-17 Ignition circuits for high pressure mercury lamps

Country Status (3)

Country Link
DE (1) DE1639115B1 (en)
FR (1) FR2000477A1 (en)
GB (1) GB1254892A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146185A (en) * 1983-07-28 1985-04-11 Tungsram Reszvenytarsasag Lighting system
GB2172451A (en) * 1985-02-07 1986-09-17 El Co Villamos Keszulekek Es S Circuit for igniting and lighting a high pressure discharge lamp
US4881012A (en) * 1986-12-15 1989-11-14 U.S. Philips Corporation Switching arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742276A (en) * 1986-07-25 1988-05-03 The Perkin-Elmer Corporation Regulated deuterium arc supply system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176278B (en) * 1962-09-29 1964-08-20 Siemens Ag Circuit arrangement for igniting high-pressure gas discharge lamps fed with direct current, each of which is assigned a high-frequency ignition device
US3309567A (en) * 1965-10-22 1967-03-14 Berkey Photo Inc Pulse discharge lamp circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146185A (en) * 1983-07-28 1985-04-11 Tungsram Reszvenytarsasag Lighting system
GB2172451A (en) * 1985-02-07 1986-09-17 El Co Villamos Keszulekek Es S Circuit for igniting and lighting a high pressure discharge lamp
US4749914A (en) * 1985-02-07 1988-06-07 El-Co Villamos Keszulekek Es Szerelesi Anyagok Gyara Circuit system for igniting and operating a high-pressure discharge lamp, particularly a sodium vapor lamp
GB2172451B (en) * 1985-02-07 1989-06-14 El Co Villamos Keszulekek Es S Circuit system for igniting and lighting a high-pressure discharge lamp particulary a sodium vapour lamp
US4881012A (en) * 1986-12-15 1989-11-14 U.S. Philips Corporation Switching arrangement

Also Published As

Publication number Publication date
DE1639115B1 (en) 1971-06-09
FR2000477A1 (en) 1969-09-05

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