FR1575121A - - Google Patents

Info

Publication number
FR1575121A
FR1575121A FR1575121DA FR1575121A FR 1575121 A FR1575121 A FR 1575121A FR 1575121D A FR1575121D A FR 1575121DA FR 1575121 A FR1575121 A FR 1575121A
Authority
FR
France
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR1575121A publication Critical patent/FR1575121A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/26—Cooling
    • 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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/231—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for high-pressure lamps

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
FR1575121D 1967-07-25 1968-07-24 Expired FR1575121A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65595667A 1967-07-25 1967-07-25

Publications (1)

Publication Number Publication Date
FR1575121A true FR1575121A (de) 1969-07-18

Family

ID=24631060

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1575121D Expired FR1575121A (de) 1967-07-25 1968-07-24

Country Status (4)

Country Link
US (1) US3470415A (de)
DE (1) DE1764728A1 (de)
FR (1) FR1575121A (de)
GB (1) GB1227966A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870316A (en) * 1987-04-16 1989-09-26 Mitsubishi Denki Kabushiki Kaisha Pulsed alkali metal vapor discharge lamp with ceramics outer envelope
US7654696B2 (en) * 2002-12-11 2010-02-02 Koninklijke Philips Electronics, N.V. Lighting unit
CN116658450B (zh) * 2023-07-26 2023-11-03 苏州浪潮智能科技有限公司 风扇控制系统、服务器系统、风扇控制方法及装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2080908A (en) * 1935-07-27 1937-05-18 Gen Electric Electric gaseous discharge device
GB538793A (en) * 1940-01-12 1941-08-18 Gen Electric Co Ltd Improvements in combinations of a hpmv lamp with means for cooling it
US3359454A (en) * 1966-04-22 1967-12-19 Nuarc Company Lamp control system for automatically controlling the cooling blower

Also Published As

Publication number Publication date
DE1764728A1 (de) 1971-10-14
GB1227966A (de) 1971-04-15
US3470415A (en) 1969-09-30

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Legal Events

Date Code Title Description
ST Notification of lapse