GB158526A - Improvements relating to kinematograph projection apparatus - Google Patents

Improvements relating to kinematograph projection apparatus

Info

Publication number
GB158526A
GB158526A GB15014/20A GB1501420A GB158526A GB 158526 A GB158526 A GB 158526A GB 15014/20 A GB15014/20 A GB 15014/20A GB 1501420 A GB1501420 A GB 1501420A GB 158526 A GB158526 A GB 158526A
Authority
GB
United Kingdom
Prior art keywords
projection apparatus
improvements relating
kinematograph
kinematograph projection
relating
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
GB15014/20A
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.)
Petra AG fuer Elektro Mechanik
Original Assignee
Petra AG fuer Elektro Mechanik
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 Petra AG fuer Elektro Mechanik filed Critical Petra AG fuer Elektro Mechanik
Publication of GB158526A publication Critical patent/GB158526A/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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
GB15014/20A 1920-01-30 1920-06-02 Improvements relating to kinematograph projection apparatus Expired GB158526A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE158526X 1920-01-30

Publications (1)

Publication Number Publication Date
GB158526A true GB158526A (en) 1921-04-14

Family

ID=5679659

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15014/20A Expired GB158526A (en) 1920-01-30 1920-06-02 Improvements relating to kinematograph projection apparatus

Country Status (1)

Country Link
GB (1) GB158526A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135392A (en) * 1982-12-24 1984-08-30 Dong Yang Jung Ki Ind Co Limit Apparatus for controlling the direction of air flow from a fan

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135392A (en) * 1982-12-24 1984-08-30 Dong Yang Jung Ki Ind Co Limit Apparatus for controlling the direction of air flow from a fan

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