DE206079C - - Google Patents

Info

Publication number
DE206079C
DE206079C DENDAT206079D DE206079DA DE206079C DE 206079 C DE206079 C DE 206079C DE NDAT206079 D DENDAT206079 D DE NDAT206079D DE 206079D A DE206079D A DE 206079DA DE 206079 C DE206079 C DE 206079C
Authority
DE
Germany
Prior art keywords
fire
flaps
book
automatically
closed
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.)
Active
Application number
DENDAT206079D
Other languages
German (de)
English (en)
Publication of DE206079C publication Critical patent/DE206079C/de
Active 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
    • G03B21/18—Fire preventing or extinguishing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
DENDAT206079D Active DE206079C (show.php)

Publications (1)

Publication Number Publication Date
DE206079C true DE206079C (show.php)

Family

ID=468282

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT206079D Active DE206079C (show.php)

Country Status (1)

Country Link
DE (1) DE206079C (show.php)

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