GB2021336A - Arrangement for supplying fluorescent lamps with power at two levels and lighting installation incorporating such an arrangement - Google Patents

Arrangement for supplying fluorescent lamps with power at two levels and lighting installation incorporating such an arrangement

Info

Publication number
GB2021336A
GB2021336A GB7909133A GB7909133A GB2021336A GB 2021336 A GB2021336 A GB 2021336A GB 7909133 A GB7909133 A GB 7909133A GB 7909133 A GB7909133 A GB 7909133A GB 2021336 A GB2021336 A GB 2021336A
Authority
GB
United Kingdom
Prior art keywords
arrangement
power
lamp
levels
fluorescent lamps
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.)
Granted
Application number
GB7909133A
Other versions
GB2021336B (en
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.)
Compagnie des Lampes
Original Assignee
Compagnie des Lampes
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 Compagnie des Lampes filed Critical Compagnie des Lampes
Publication of GB2021336A publication Critical patent/GB2021336A/en
Application granted granted Critical
Publication of GB2021336B publication Critical patent/GB2021336B/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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • H05B41/42—Controlling the intensity of light discontinuously in two steps only

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

A circuit for supplying power to a fluorescent lamp 1 comprises a main supply circuit 3 which enables the lamp to operate at its maximum level of illumination, and a switch 5 which connects an auxiliary circuit 4 to the main supply circuit so that the lamp operates at a reduced level of illumination. The switch 5 is a relay having a coil 11 and contacts, a, b, c, d, the contacts a, b being closed when the relay is de-energised so that the lamp operates at full power. When the relay is energised, contacts c, d are closed so that part of the lamp current is shunted through a thyristor T in the circuit 4 and the lamp operates at reduced power. A potentiometer P enables the reduced power level to be adjusted. <IMAGE>
GB7909133A 1978-03-17 1979-03-15 Arrangement for supplying fluorescent lamps with power at two levels and lighting installation incorporating such anarrangement Expired GB2021336B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7807802A FR2420271A1 (en) 1978-03-17 1978-03-17 POWER SUPPLY DEVICE ON TWO POWER LEVELS FOR FLUORESCENT LAMPS, AND LIGHTING INSTALLATION INCLUDING SUCH A DEVICE

Publications (2)

Publication Number Publication Date
GB2021336A true GB2021336A (en) 1979-11-28
GB2021336B GB2021336B (en) 1982-07-07

Family

ID=9205956

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7909133A Expired GB2021336B (en) 1978-03-17 1979-03-15 Arrangement for supplying fluorescent lamps with power at two levels and lighting installation incorporating such anarrangement

Country Status (8)

Country Link
BE (1) BE874913A (en)
DE (1) DE2910492A1 (en)
ES (1) ES478703A1 (en)
FR (1) FR2420271A1 (en)
GB (1) GB2021336B (en)
IT (1) IT1111522B (en)
LU (1) LU81054A1 (en)
NL (1) NL7902027A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155258A (en) * 1984-01-27 1985-09-18 Concord Controls Limited Control circuit for a fluorescent tube

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3618975A1 (en) * 1986-06-05 1987-12-10 M & V Reklametechnik Ohg Method for the intermittent operation of a fluorescent lamp, and a circuit for carrying out the method
DE4100369A1 (en) * 1991-01-09 1992-07-23 Albert Henning Operating fluorescent lamps for advertising or information display - periodically switching ionisation phase of individual lamps on or off and maintaining electrode temp. using short circuit phase
US5324423A (en) * 1993-02-11 1994-06-28 Amway Corporation UV bulb intensity control for water treatment system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1283225A (en) * 1960-12-19 1962-02-02 Pat & Visseaux Claude Circuit for the variable current supply of a discharge device
FR1568201A (en) * 1968-03-13 1969-05-23
GB1410351A (en) * 1972-01-11 1975-10-15 Martin D J Controlling the power supplied to a load

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155258A (en) * 1984-01-27 1985-09-18 Concord Controls Limited Control circuit for a fluorescent tube

Also Published As

Publication number Publication date
IT7920960A0 (en) 1979-03-14
NL7902027A (en) 1979-09-19
IT1111522B (en) 1986-01-13
LU81054A1 (en) 1980-09-24
GB2021336B (en) 1982-07-07
ES478703A1 (en) 1979-11-01
BE874913A (en) 1979-09-17
FR2420271B1 (en) 1981-10-16
DE2910492A1 (en) 1979-09-20
FR2420271A1 (en) 1979-10-12

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Legal Events

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