GB1208509A - Circuit for a fluorescent lamp - Google Patents

Circuit for a fluorescent lamp

Info

Publication number
GB1208509A
GB1208509A GB42315/69A GB4231569A GB1208509A GB 1208509 A GB1208509 A GB 1208509A GB 42315/69 A GB42315/69 A GB 42315/69A GB 4231569 A GB4231569 A GB 4231569A GB 1208509 A GB1208509 A GB 1208509A
Authority
GB
United Kingdom
Prior art keywords
filaments
filament
oscillator
battery
inductance coil
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
GB42315/69A
Inventor
Sandford Christopher Peek Jr
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products 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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB1208509A publication Critical patent/GB1208509A/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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
    • 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
    • H05B35/00—Electric light sources using a combination of different types of light generation

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)

Abstract

1,208,509. Discharge lamp circuits. SYLVANIA ELECTRIC PRODUCTS Inc. 3 July, 1968 [3 July, 1967], No. 42315/69. Divided out of 1,208,508. Heading H2H. A circuit for a fluorescent lamp 1, having two cathode filaments 8, 9 between which an electrical discharge is to be passed, includes an inductance coil 12 connecting one end of each filament to the other filament, a battery 15 connected across the other ends of the filaments, and an oscillator 13 connected to supply A.C. between the cathode filaments, the inductance coil passing D.C. from the battery but opposing the passage of A.C. from the oscillator. The lamp shown is described in Specification 1,208,508 and comprises two spaced sets of filaments, each set containing a cathode filament 8, 9 coated with electron-emitting material and an incandescent filament 10, 11. The incandescent filaments provide illumination when the discharge is inhibited by a low vapour pressure due to low ambient temperature, e.g. in an automobile at starting in winter. In an alternative circuit (Fig. 2, not shown) the transformer 17 is omtited. The oscillator 13 is connected in series with a capacitor across the leads 5 and 7 in parallel with the battery 15 and a second inductance coil.
GB42315/69A 1967-07-03 1968-07-03 Circuit for a fluorescent lamp Expired GB1208509A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65100967A 1967-07-03 1967-07-03

Publications (1)

Publication Number Publication Date
GB1208509A true GB1208509A (en) 1970-10-14

Family

ID=24611219

Family Applications (2)

Application Number Title Priority Date Filing Date
GB42315/69A Expired GB1208509A (en) 1967-07-03 1968-07-03 Circuit for a fluorescent lamp
GB31731/68A Expired GB1208508A (en) 1967-07-03 1968-07-03 Incandescent-fluorescent lamp

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB31731/68A Expired GB1208508A (en) 1967-07-03 1968-07-03 Incandescent-fluorescent lamp

Country Status (4)

Country Link
US (1) US3521122A (en)
DE (1) DE1764599A1 (en)
FR (1) FR1571245A (en)
GB (2) GB1208509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525848A1 (en) * 1982-04-21 1983-10-28 Helvar Oy METHOD AND APPARATUS FOR PROVIDING HIGH FREQUENCY ALTERNATING CURRENT TO A FLUORESCENCE LAMP

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4329622A (en) * 1980-05-19 1982-05-11 Xerox Corporation Low pressure gas discharge lamp with increased end illumination
US4792727A (en) * 1987-10-05 1988-12-20 Gte Products Corporation System and method for operating a discharge lamp to obtain positive volt-ampere characteristic
US5066892A (en) * 1990-12-07 1991-11-19 Gte Products Corporation Glow discharge lamp with incandescent filament

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2315286A (en) * 1941-01-11 1943-03-30 Westinghouse Electric & Mfg Co Gaseous discharge lamp
US2429415A (en) * 1945-06-07 1947-10-21 Gen Electric Circuit for electric discharge devices
BE570661A (en) * 1957-08-29
FR1295408A (en) * 1961-04-15 1962-06-08 Complex bulb with application to automobile headlights
US3215881A (en) * 1962-08-20 1965-11-02 Sylvania Electric Prod Start-run plural cathode structure
US3412276A (en) * 1967-02-02 1968-11-19 Coastal Dynamics Corp Twin filament lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525848A1 (en) * 1982-04-21 1983-10-28 Helvar Oy METHOD AND APPARATUS FOR PROVIDING HIGH FREQUENCY ALTERNATING CURRENT TO A FLUORESCENCE LAMP
GB2119184A (en) * 1982-04-21 1983-11-09 Helvar Oy High frequency current supply method and apparatus
US5034660A (en) * 1982-04-21 1991-07-23 Oy Helvar Method of and apparatus for supplying high frequency alternating current to a fluorescence lamp

Also Published As

Publication number Publication date
FR1571245A (en) 1969-06-13
US3521122A (en) 1970-07-21
DE1764599A1 (en) 1971-09-09
GB1208508A (en) 1970-10-14

Similar Documents

Publication Publication Date Title
GB1504790A (en) Electric device for starting and supplying a gas and/or vapour discharge lamp
GB1208509A (en) Circuit for a fluorescent lamp
GB1190690A (en) Regulating Circuit for Discharge Devices.
US2558747A (en) Electric lighting system
GB1359965A (en) Circuit arrangement for igniting and supplying a gas- and/or vapour discharge lamp
GB830243A (en) Improvements in or relating to gas-filled electric incandescent lamps
GB511199A (en) Improvements in sources of light comprising a high-pressure mercury vapour electric discharge and an incandescent filament in series with it
GB1485166A (en) Ballast circuit for a gaseous discharge lamp
GB739457A (en) Improvements in or relating to electric circuits for electric discharge lamps
US2795692A (en) Fluorescent lamp fixture and circuit
GB1199453A (en) Circuit Arrangements for Use with Discharge Tubes.
US2464373A (en) Fluorescent discharge tube
GB1017009A (en) Improvements relating to operating circuits for low pressure metal vapour electric discharge lamps
US3003079A (en) Fluorescent lamp dimming circuit
US2829311A (en) Low-pressure arc discharge tube arrangement
GB757080A (en) Improvements in and relating to operating circuits for electric discharge lamps
GB1295538A (en)
GB839768A (en) Improvements relating to the operation of electric flash discharge tubes
GB782854A (en) Improvements in and relating to electric discharge tube circuits
GB553184A (en) Improvements in and relating to composite electrodes for gaseous electric discharge devices
GB502585A (en) Improvements in sources of light comprising electric discharge lamps
GB639441A (en) Improvements in circuit arrangements for electric gas discharge lamps
GB612958A (en) Improvements relating to starting arrangements for electric fluorescent lamps and other discharge devices
GB755776A (en) Improvements in or relating to electric circuits for starting and operating fluorescent lamps
GB475413A (en) Improvements in high frequency generators for feeding luminous electric discharge tubes

Legal Events

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