FR1574445A - - Google Patents

Info

Publication number
FR1574445A
FR1574445A FR1574445DA FR1574445A FR 1574445 A FR1574445 A FR 1574445A FR 1574445D A FR1574445D A FR 1574445DA FR 1574445 A FR1574445 A FR 1574445A
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
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 FR1574445A publication Critical patent/FR1574445A/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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Protection Of Generators And Motors (AREA)
  • Control Of Stepping Motors (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Projection Apparatus (AREA)
FR1574445D 1967-07-19 1968-07-15 Expired FR1574445A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65446367A 1967-07-19 1967-07-19

Publications (1)

Publication Number Publication Date
FR1574445A true FR1574445A (fr) 1969-07-11

Family

ID=24624956

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1574445D Expired FR1574445A (fr) 1967-07-19 1968-07-15

Country Status (4)

Country Link
US (1) US3471745A (fr)
FR (1) FR1574445A (fr)
GB (1) GB1184520A (fr)
NL (1) NL6810179A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2130521A1 (fr) * 1971-03-22 1972-11-03 Eastman Kodak Co

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3562580A (en) * 1969-01-10 1971-02-09 Minnesota Mining & Mfg Lamp-failure detection and change device
FI874165A7 (fi) * 1987-09-23 1989-03-24 Jorma Hiljanen Menetelmä ja laite hehkulangan vaihtamiseksi sekä monihehkulankalamppu.
US5023515A (en) * 1990-03-16 1991-06-11 American Sterilizer Company Redundant lamp control circuit
FR2725049A1 (fr) * 1994-09-22 1996-03-29 Lara Sa Dispositif de remplacement, par une lampe de secours, de la lampe defectueuse d'un appareil de projection, notamment un retroprojecteur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998545A (en) * 1958-05-26 1961-08-29 Ca Nat Research Council Navigation light changer having lamp current monitor
US3146375A (en) * 1961-02-24 1964-08-25 Wallace & Tiernan Inc Lamp changer mechanism and control circuit therefor responsive to both light emission and filament continuity
US3269795A (en) * 1964-05-11 1966-08-30 Rca Corp Automatic exciter lamp changer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2130521A1 (fr) * 1971-03-22 1972-11-03 Eastman Kodak Co

Also Published As

Publication number Publication date
GB1184520A (en) 1970-03-18
NL6810179A (fr) 1969-01-21
US3471745A (en) 1969-10-07
DE1763683B1 (de) 1972-10-05

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Legal Events

Date Code Title Description
ST Notification of lapse