FR788090A - Improvements to light projection devices - Google Patents

Improvements to light projection devices

Info

Publication number
FR788090A
FR788090A FR788090DA FR788090A FR 788090 A FR788090 A FR 788090A FR 788090D A FR788090D A FR 788090DA FR 788090 A FR788090 A FR 788090A
Authority
FR
France
Prior art keywords
light projection
projection devices
devices
light
projection
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
French (fr)
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.)
PIERRE GUERLAIS ETS
Original Assignee
PIERRE GUERLAIS ETS
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 PIERRE GUERLAIS ETS filed Critical PIERRE GUERLAIS ETS
Application granted granted Critical
Publication of FR788090A publication Critical patent/FR788090A/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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR788090D 1935-03-30 1935-03-30 Improvements to light projection devices Expired FR788090A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR788090T 1935-03-30

Publications (1)

Publication Number Publication Date
FR788090A true FR788090A (en) 1935-10-03

Family

ID=9219323

Family Applications (1)

Application Number Title Priority Date Filing Date
FR788090D Expired FR788090A (en) 1935-03-30 1935-03-30 Improvements to light projection devices

Country Status (1)

Country Link
FR (1) FR788090A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE926463C (en) * 1952-09-07 1955-04-18 Zeiss Ikon Dresden Veb Projector for normal or narrow film with water cooling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE926463C (en) * 1952-09-07 1955-04-18 Zeiss Ikon Dresden Veb Projector for normal or narrow film with water cooling

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