NL7212886A - - Google Patents

Info

Publication number
NL7212886A
NL7212886A NL7212886A NL7212886A NL7212886A NL 7212886 A NL7212886 A NL 7212886A NL 7212886 A NL7212886 A NL 7212886A NL 7212886 A NL7212886 A NL 7212886A NL 7212886 A NL7212886 A NL 7212886A
Authority
NL
Netherlands
Application number
NL7212886A
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 filed Critical
Publication of NL7212886A publication Critical patent/NL7212886A/xx

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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/73—Controlling exposure by variation of spectral composition, e.g. multicolor printers
NL7212886A 1971-09-23 1972-09-22 NL7212886A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18309471A 1971-09-23 1971-09-23

Publications (1)

Publication Number Publication Date
NL7212886A true NL7212886A (en) 1973-03-27

Family

ID=22671417

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7212886A NL7212886A (en) 1971-09-23 1972-09-22

Country Status (6)

Country Link
US (1) US3700960A (en)
JP (1) JPS4841565A (en)
CA (1) CA1031407A (en)
DE (1) DE2246234A1 (en)
FR (1) FR2153366A1 (en)
NL (1) NL7212886A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2313997C3 (en) * 1973-03-21 1975-08-28 Intermadox Ag, Zug (Schweiz) Photoelectric potentiometer arrangement avoiding moving current feeds
US3909609A (en) * 1973-10-29 1975-09-30 Xerox Corp Light source measuring apparatus
US3904922A (en) * 1973-11-19 1975-09-09 Xerox Corp Lamp control and lamp switch circuit
GB1449519A (en) * 1973-12-13 1976-09-15 Gunssons Sortex Ltd Light-sensitive sorting machine
US4012663A (en) * 1974-11-25 1977-03-15 General Electric Company Lighting control system
JPS5225484A (en) * 1975-08-21 1977-02-25 Mitsubishi Electric Corp Mixing light illuminating method
US4004188A (en) * 1975-09-26 1977-01-18 General Electric Company Starting circuit for inverter operated gaseous discharge lamps
JPS52104375A (en) * 1976-02-27 1977-09-01 Mitsubishi Electric Corp Illumination method by blended light
US4190795A (en) * 1977-09-09 1980-02-26 Coberly & Associates Constant intensity light source
US4360756A (en) * 1979-11-13 1982-11-23 General Electric Company Metal halide lamp containing ThI4 with added elemental cadmium or zinc
NZ201203A (en) * 1981-07-28 1985-08-30 Lee Electric Lighting Arc lamp supply:fet bridge inverter powered by constant current source
JPS61110996A (en) * 1984-11-05 1986-05-29 株式会社日立製作所 High voltage discharge lamp lighting apparatus
US4697709A (en) * 1985-09-03 1987-10-06 Delta Technology Corporation Sorter for agricultural products
US5333034A (en) * 1992-01-31 1994-07-26 Bremson Data Systems, Inc. System for selectively controlling the spectral make-up of visible light from a source thereof
JP2902272B2 (en) * 1993-08-27 1999-06-07 株式会社三協精機製作所 Magnetic card reader
US5581161A (en) * 1994-07-13 1996-12-03 Gong; Mingfu DC coupled electronic ballast with a larger DC and smaller AC signal
US6864642B2 (en) * 2002-10-07 2005-03-08 Bruce Industries, Inc. Electronic ballast with DC output flyback converter
US6879113B2 (en) * 2003-03-11 2005-04-12 Bruce Industries, Inc. Low frequency output electronic ballast

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749501A (en) * 1950-10-06 1956-06-05 California Packing Corp Photoelectric voltage regulator
US3431427A (en) * 1965-10-24 1969-03-04 Henry D Pahl Jr Solid state color balance controller for incandescent lamps

Also Published As

Publication number Publication date
CA1031407A (en) 1978-05-16
FR2153366A1 (en) 1973-05-04
DE2246234A1 (en) 1973-03-29
JPS4841565A (en) 1973-06-18
US3700960A (en) 1972-10-24

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