GB1227966A - - Google Patents

Info

Publication number
GB1227966A
GB1227966A GB1227966DA GB1227966A GB 1227966 A GB1227966 A GB 1227966A GB 1227966D A GB1227966D A GB 1227966DA GB 1227966 A GB1227966 A GB 1227966A
Authority
GB
United Kingdom
Prior art keywords
lamp
relay
switch
discharge
energized
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
Other languages
English (en)
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 GB1227966A publication Critical patent/GB1227966A/en
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)
GB1227966D 1967-07-25 1968-07-22 Expired GB1227966A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1227966A true GB1227966A (enrdf_load_stackoverflow) 1971-04-15

Family

ID=24631060

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1227966D Expired GB1227966A (enrdf_load_stackoverflow) 1967-07-25 1968-07-22

Country Status (4)

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

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
FR1575121A (enrdf_load_stackoverflow) 1969-07-18
US3470415A (en) 1969-09-30
DE1764728A1 (de) 1971-10-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees