GB1284603A - Control unit for hot cathode gas discharge lamps - Google Patents

Control unit for hot cathode gas discharge lamps

Info

Publication number
GB1284603A
GB1284603A GB24871/69A GB2487169A GB1284603A GB 1284603 A GB1284603 A GB 1284603A GB 24871/69 A GB24871/69 A GB 24871/69A GB 2487169 A GB2487169 A GB 2487169A GB 1284603 A GB1284603 A GB 1284603A
Authority
GB
United Kingdom
Prior art keywords
variations
voltages
control unit
transformer
winding
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
GB24871/69A
Inventor
Gordon Tremayne Kingsley Lark
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.)
TRANSTAR Ltd
Original Assignee
TRANSTAR 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 TRANSTAR Ltd filed Critical TRANSTAR Ltd
Priority to GB24871/69A priority Critical patent/GB1284603A/en
Priority to ZA703081A priority patent/ZA703081B/en
Priority to DE19702022764 priority patent/DE2022764A1/en
Priority to BE750332D priority patent/BE750332A/en
Priority to SE06610/70A priority patent/SE360239B/xx
Priority to CH730370A priority patent/CH519288A/en
Priority to NL7007152A priority patent/NL7007152A/xx
Publication of GB1284603A publication Critical patent/GB1284603A/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

Abstract

1284603 Supply circuits for discharge lamps TRANSTAR LTD 4 May 1970 [15 May 1969] 24871/69 Heading H2H [Also in Division G3] A control unit 3, for a hot cathode discharge lamp 1 and a thyristor dimming device 4, comprises a transformer 7 having a pair of secondary windings 8 and a choke 6 having at least one secondary winding 16 connected so that the variations in the voltages across the transformer secondary windings, due to the variations in the input voltage to the control unit caused by the dimming device, are reduced. The voltage developed across the winding 16 opposes that across the transformer primary winding 15 to an extent that reduces as the input to the circuit 3 decreases. Hence the variations in the transformer primary voltage are reduced so that the variations in the voltages across the secondary windings 8, which supply filaments 9, are reduced. In a modification the winding 16 is divided into two windings, the voltages across which oppose the voltages across the transformer secondary windings to reduce the variations in the filament supply voltages.
GB24871/69A 1969-05-15 1969-05-15 Control unit for hot cathode gas discharge lamps Expired GB1284603A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB24871/69A GB1284603A (en) 1969-05-15 1969-05-15 Control unit for hot cathode gas discharge lamps
ZA703081A ZA703081B (en) 1969-05-15 1970-05-06 Control gear for hot catthode gas discharge lamps
DE19702022764 DE2022764A1 (en) 1969-05-15 1970-05-09 Control unit for a gas discharge lamp
BE750332D BE750332A (en) 1969-05-15 1970-05-13 ADJUSTING DEVICE FOR HOT CATHODE GASEOUS DISCHARGE LAMPS
SE06610/70A SE360239B (en) 1969-05-15 1970-05-14
CH730370A CH519288A (en) 1969-05-15 1970-05-15 Hot cathode discharge lamp power control unit
NL7007152A NL7007152A (en) 1969-05-15 1970-05-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24871/69A GB1284603A (en) 1969-05-15 1969-05-15 Control unit for hot cathode gas discharge lamps

Publications (1)

Publication Number Publication Date
GB1284603A true GB1284603A (en) 1972-08-09

Family

ID=10218580

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24871/69A Expired GB1284603A (en) 1969-05-15 1969-05-15 Control unit for hot cathode gas discharge lamps

Country Status (7)

Country Link
BE (1) BE750332A (en)
CH (1) CH519288A (en)
DE (1) DE2022764A1 (en)
GB (1) GB1284603A (en)
NL (1) NL7007152A (en)
SE (1) SE360239B (en)
ZA (1) ZA703081B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816715A1 (en) * 1977-04-21 1978-10-26 Honeywell Ltd FEED CIRCUIT FOR LUMINOUS TUBES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816715A1 (en) * 1977-04-21 1978-10-26 Honeywell Ltd FEED CIRCUIT FOR LUMINOUS TUBES
USRE31146E (en) 1977-04-21 1983-02-08 Honeywell Ltd. Two-wire ballast for fluorescent tube dimming

Also Published As

Publication number Publication date
CH519288A (en) 1972-02-15
BE750332A (en) 1970-11-13
NL7007152A (en) 1970-11-17
ZA703081B (en) 1971-06-30
DE2022764A1 (en) 1970-11-26
SE360239B (en) 1973-09-17

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees