GB1299523A - Electric system for operating a gas discharge lamp - Google Patents

Electric system for operating a gas discharge lamp

Info

Publication number
GB1299523A
GB1299523A GB8697/70A GB869770A GB1299523A GB 1299523 A GB1299523 A GB 1299523A GB 8697/70 A GB8697/70 A GB 8697/70A GB 869770 A GB869770 A GB 869770A GB 1299523 A GB1299523 A GB 1299523A
Authority
GB
United Kingdom
Prior art keywords
triac
lamp
discharge lamp
phase angle
variable phase
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
GB8697/70A
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.)
Berkey Photo Inc
Original Assignee
Berkey Photo 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 Berkey Photo Inc filed Critical Berkey Photo Inc
Publication of GB1299523A publication Critical patent/GB1299523A/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
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3924—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by phase control, e.g. using a triac
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

1299523 Discharge lamp circuits BERKEY PHOTO Inc 24 Feb 1970 [21 April 1969] 8697/70 Heading H2H A circuit for operating a gas discharge lamp V1 comprises a triac SR1 connected in series with the lamp across an A.C. source the impedance of which forms the sole ballast, a control circuit for switching on the triac at a variable phase angle and a circuit for initially igniting the lamp at a variable phase angle corresponding to the variable phase angle at which the triac is switched. To initially ignite the lamp, a switch S1 is temporarily closed thereby charging a capacitor C2 via a resistance R7 and the source. After a time determined by the setting of a ganged resistor R8 a triac SR2 is triggered so that the capacitor C2 discharges and supplies a high voltage pulse to a transformer T1 to start the lamp. The triac SR1 is simultanously triggered and maintains the lamp on as it is switched on in each half cycle of the source voltage. The triac SR1 may be replaced by a pair of controlled rectifiers.
GB8697/70A 1969-04-21 1970-02-24 Electric system for operating a gas discharge lamp Expired GB1299523A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81791269A 1969-04-21 1969-04-21

Publications (1)

Publication Number Publication Date
GB1299523A true GB1299523A (en) 1972-12-13

Family

ID=25224184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8697/70A Expired GB1299523A (en) 1969-04-21 1970-02-24 Electric system for operating a gas discharge lamp

Country Status (5)

Country Link
US (1) US3622838A (en)
CA (1) CA935865A (en)
DE (1) DE2019255A1 (en)
FR (1) FR2046239A5 (en)
GB (1) GB1299523A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738594A (en) * 1980-08-20 1982-03-03 Ushio Electric Inc Device for firing discharge lamp
MX9202472A (en) * 1991-05-31 1993-12-01 Kelmas Co Sa ELECTRONIC STARTER FOR FLUORESCENT TUBES.
US6650070B1 (en) 2002-07-25 2003-11-18 Varon Lighting, Inc. Point of use lighting controller
US9916781B2 (en) * 2012-03-02 2018-03-13 Michael Shipman Illuminated vehicular sign

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870379A (en) * 1958-08-13 1959-01-20 Engelhard Ind Inc Operating circuit for compact type arc lamps
US3344311A (en) * 1965-05-24 1967-09-26 Gen Electric Compensating control circuit

Also Published As

Publication number Publication date
US3622838A (en) 1971-11-23
CA935865A (en) 1973-10-23
FR2046239A5 (en) 1971-03-05
DE2019255A1 (en) 1970-10-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee