GB1017009A - Improvements relating to operating circuits for low pressure metal vapour electric discharge lamps - Google Patents

Improvements relating to operating circuits for low pressure metal vapour electric discharge lamps

Info

Publication number
GB1017009A
GB1017009A GB4687863A GB4687863A GB1017009A GB 1017009 A GB1017009 A GB 1017009A GB 4687863 A GB4687863 A GB 4687863A GB 4687863 A GB4687863 A GB 4687863A GB 1017009 A GB1017009 A GB 1017009A
Authority
GB
United Kingdom
Prior art keywords
low pressure
discharge lamps
lamp
electric discharge
improvements relating
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
GB4687863A
Inventor
Raymond Taylor
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB4687863A priority Critical patent/GB1017009A/en
Publication of GB1017009A publication Critical patent/GB1017009A/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
    • H05B41/232—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 low-pressure lamps
    • H05B41/2325—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 low-pressure lamps provided with pre-heating electrodes
    • 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
    • H05B41/22—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 having an auxiliary starting electrode

Abstract

1,017,009. Control systems for low pressure discharge lamps. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Nov. 25, 1964 [Nov. 27, 1963], No. 46878/63. Heading H2H. A circuit to provide dimming of a low-pressure discharge lamp of the type having a heating element 4 associated with the lamp 1, which may be a sodium type used particularly for an airport beacon or for lighting, comprises an autotransformer 12, 13 supplying both the element 4 and filaments 2, 3 and a frequencysensitive reactor 11 carrying the discharge current, both being supplied from another autotransformer 5. By varying the frequency and voltage of the supply 20 the discharge current and lamp heating may be varied independently so as to give for example reduced illumination at night. A number of transformers 5 may be connected in series or parallel or they may be replaced by tapped resistors. In an alternative arrangement the transformers 5 are in series with a group of parallel tuned resonant filters (Fig. 3, not shown).
GB4687863A 1963-11-27 1963-11-27 Improvements relating to operating circuits for low pressure metal vapour electric discharge lamps Expired GB1017009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4687863A GB1017009A (en) 1963-11-27 1963-11-27 Improvements relating to operating circuits for low pressure metal vapour electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4687863A GB1017009A (en) 1963-11-27 1963-11-27 Improvements relating to operating circuits for low pressure metal vapour electric discharge lamps

Publications (1)

Publication Number Publication Date
GB1017009A true GB1017009A (en) 1966-01-12

Family

ID=10442934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4687863A Expired GB1017009A (en) 1963-11-27 1963-11-27 Improvements relating to operating circuits for low pressure metal vapour electric discharge lamps

Country Status (1)

Country Link
GB (1) GB1017009A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396872A (en) * 1981-03-30 1983-08-02 General Mills, Inc. Ballast circuit and method for optimizing the operation of high intensity discharge lamps in the growing of plants
US4700113A (en) * 1981-12-28 1987-10-13 North American Philips Corporation Variable high frequency ballast circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396872A (en) * 1981-03-30 1983-08-02 General Mills, Inc. Ballast circuit and method for optimizing the operation of high intensity discharge lamps in the growing of plants
US4700113A (en) * 1981-12-28 1987-10-13 North American Philips Corporation Variable high frequency ballast circuit

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