GB1522533A - Apparatus for controlling the output of one or more lamps - Google Patents

Apparatus for controlling the output of one or more lamps

Info

Publication number
GB1522533A
GB1522533A GB12249/76A GB1224976A GB1522533A GB 1522533 A GB1522533 A GB 1522533A GB 12249/76 A GB12249/76 A GB 12249/76A GB 1224976 A GB1224976 A GB 1224976A GB 1522533 A GB1522533 A GB 1522533A
Authority
GB
United Kingdom
Prior art keywords
output
photo
detector
controlling
response
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
GB12249/76A
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.)
Esquire Inc
Original Assignee
Esquire 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 Esquire Inc filed Critical Esquire Inc
Publication of GB1522533A publication Critical patent/GB1522533A/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
    • H05B41/3922—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations and measurement of the incident light

Abstract

1522533 Automatic control of lighting intensity ESQUIRE Inc 26 March 1976 [27 May 1975] 12249/76 Heading G3R The total illumination of a work area (e.g. lit by daylight and artifically) is kept constant by controlling at least one lamp in response to a comparison of the output of a photo-detector with a reference voltage, the rate of change of the difference being limited so as to prevent response to transient changes in the ambient lighting, e.g. by the passage of clouds. The circuits are described in detail, the limitation to transients being provided by an integrating capacitor on the output of a buffer amplifier supplying a dimming control voltage. The output of the photo-detector is also compared with a second reference value which, when passed, signals the need for lamp replacement.
GB12249/76A 1975-05-27 1976-03-26 Apparatus for controlling the output of one or more lamps Expired GB1522533A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58127075A 1975-05-27 1975-05-27

Publications (1)

Publication Number Publication Date
GB1522533A true GB1522533A (en) 1978-08-23

Family

ID=24324529

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12249/76A Expired GB1522533A (en) 1975-05-27 1976-03-26 Apparatus for controlling the output of one or more lamps

Country Status (9)

Country Link
AU (1) AU504533B2 (en)
BE (1) BE841405A (en)
BR (1) BR7602759A (en)
CA (1) CA1071294A (en)
DE (1) DE2622392A1 (en)
ES (1) ES448493A1 (en)
FR (1) FR2313837A1 (en)
GB (1) GB1522533A (en)
IT (1) IT1073959B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086664A1 (en) * 1982-02-17 1983-08-24 Esquire Inc. Lamp dimming apparatus
GB2151051A (en) * 1983-12-05 1985-07-10 Sunpak Kk Photographic or television lighting apparatus
WO1986005351A1 (en) * 1985-03-04 1986-09-12 Stiftelsen For Industriell Og Teknisk Forskning Ve Device for control of lighting fixture

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT376781B (en) * 1982-04-16 1984-12-27 Zumtobel Ag POWER-SAVING WORKPLACE LIGHT
US4721890A (en) * 1982-06-18 1988-01-26 Eg&G, Inc. Power supply circuit for an alkali vapor spectral lamp
FR2604540B1 (en) * 1986-09-30 1989-07-07 Develop Prod Electro Et DEVICE FOR ELECTRICALLY SUPPLYING A LIGHT SOURCE USING HALOGEN LAMPS

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1410742A (en) * 1964-10-07 1965-09-10 Philips Nv Device for controlling lighting in a dark space
US3361931A (en) * 1965-01-11 1968-01-02 Mc Graw Edison Co Photocontrol device for gaseous discharge lamps
US3681654A (en) * 1971-02-18 1972-08-01 Wagner Electric Corp Light-regulating power supply circuit for gaseous discharge lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086664A1 (en) * 1982-02-17 1983-08-24 Esquire Inc. Lamp dimming apparatus
GB2151051A (en) * 1983-12-05 1985-07-10 Sunpak Kk Photographic or television lighting apparatus
WO1986005351A1 (en) * 1985-03-04 1986-09-12 Stiftelsen For Industriell Og Teknisk Forskning Ve Device for control of lighting fixture

Also Published As

Publication number Publication date
BR7602759A (en) 1977-11-16
FR2313837B1 (en) 1980-09-05
FR2313837A1 (en) 1976-12-31
BE841405A (en) 1976-09-01
AU504533B2 (en) 1979-10-18
ES448493A1 (en) 1977-07-01
IT1073959B (en) 1985-04-17
CA1071294A (en) 1980-02-05
AU1324576A (en) 1977-10-27
DE2622392A1 (en) 1976-12-09

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Legal Events

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