GB1324598A - Battery-powered fluorescent lighting units - Google Patents

Battery-powered fluorescent lighting units

Info

Publication number
GB1324598A
GB1324598A GB1324598DA GB1324598A GB 1324598 A GB1324598 A GB 1324598A GB 1324598D A GB1324598D A GB 1324598DA GB 1324598 A GB1324598 A GB 1324598A
Authority
GB
United Kingdom
Prior art keywords
inverter
resistor
lamps
switch
battery
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
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.)
BARDIC SYSTEMS Ltd
Original Assignee
BARDIC SYSTEMS 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 BARDIC SYSTEMS Ltd filed Critical BARDIC SYSTEMS Ltd
Publication of GB1324598A publication Critical patent/GB1324598A/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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1324598 Supply systems for fluorescent lamps BARDIC SYSTEMS LTD 4 Nov 1970 [6 Nov 1969] 54446/69 Heading H2H Fluorescent lighting apparatus comprises two fluorescent lamps 10, 11 connected in series and supplied from a battery 12 by way of an inverter 15, the apparatus further including a switch 36 which, when operated, short circuits one of the lamps and simultaneously reduces the output of the inverter. The inverter comprises a transistor 16 having its collector connected to the primary winding 17/1 of a transformer 17, the feed back winding 17/3 of the transformer being connected to the base of the transistor whilst the lamps 10, 11 are connected in series across the secondary winding 17/2. With the two parts of the switch 36 in the positions shown the lamp 11 is short circuited and the feed-back circuit of the inverter includes the resistor 34. With the parts of the switch in their alternative positions the short circuit is removed from lamp 11 and a resistor 35 is placed in parallel with the resistor 34 in the feed-back circuit.
GB1324598D 1969-11-06 1969-11-06 Battery-powered fluorescent lighting units Expired GB1324598A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5444669 1969-11-06

Publications (1)

Publication Number Publication Date
GB1324598A true GB1324598A (en) 1973-07-25

Family

ID=10471015

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1324598D Expired GB1324598A (en) 1969-11-06 1969-11-06 Battery-powered fluorescent lighting units

Country Status (1)

Country Link
GB (1) GB1324598A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2394958A1 (en) * 1977-06-14 1979-01-12 Lluelles Jean Claude AC derived supply for cold cathode discharge lamps - has relaxation oscillator with thyristor threshold control
GB2174257A (en) * 1985-04-25 1986-10-29 Thantiri Mudalige Don Philip Oscillator for gas discharge lamp
GB2334639A (en) * 1998-02-19 1999-08-25 Zetex Plc Cold cathode fluorescent lamp driver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2394958A1 (en) * 1977-06-14 1979-01-12 Lluelles Jean Claude AC derived supply for cold cathode discharge lamps - has relaxation oscillator with thyristor threshold control
GB2174257A (en) * 1985-04-25 1986-10-29 Thantiri Mudalige Don Philip Oscillator for gas discharge lamp
GB2334639A (en) * 1998-02-19 1999-08-25 Zetex Plc Cold cathode fluorescent lamp driver

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee