DE350473C - Locking disc for cinematographs designed as fire protection means - Google Patents

Locking disc for cinematographs designed as fire protection means

Info

Publication number
DE350473C
DE350473C DE1920350473D DE350473DD DE350473C DE 350473 C DE350473 C DE 350473C DE 1920350473 D DE1920350473 D DE 1920350473D DE 350473D D DE350473D D DE 350473DD DE 350473 C DE350473 C DE 350473C
Authority
DE
Germany
Prior art keywords
designed
picture window
cinematographs
fire protection
protection means
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
DE1920350473D
Other languages
German (de)
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.)
HANS PANDER
Original Assignee
HANS PANDER
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 HANS PANDER filed Critical HANS PANDER
Application granted granted Critical
Publication of DE350473C publication Critical patent/DE350473C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/18Fire preventing or extinguishing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Special Wing (AREA)

Description

Als Feuerschutzmittel ausgebildete Verschlußscheibe für Kinematographen. Werden Filmteile in stehender Projektion vorgeführt, so muß das im Bildfenster stehende Bildbandstück möglichst ausgedehnt gegen die Wärmewirkung der Lichtquelle geschützt werden. In weitestem Maße scheint eine Vorrichtung dieser Aufgabe gerecht werden zu können, die in sich die Verschlußscheibe zum Abdecken des Bildwechsels und kurzem Verdunkeln des stehenden Bildes mit einem 'Wärmefilter und einer Kühlvorrichtung- für das Bildfenster vereint und zudem sich selbst kühlt. Dies wird dadurch ermöglicht, daß man die als Ventilator ausgebildete, zwischen Kondensor und Bildfenster diesem tunlichst nahe angebrachte umlaufende Verschlußscheibe so ausbildet, daß sie r. den ganzen Strahlengang des Kondensors bis auf das dem Bildfenster zugeordnete Bündel abdeckt, also nur ringförmige Stücke lichtdurchlässig sind, daß 2. die lichtdurchlässigen Teile als Wärmefilter ausgebildet sind, etwa indem sie aus einem die Wärmestrahlen stark absorbierenden, aber lichtdurchlässigen Körper, wie z. B. Eisenoxydulglas, hergestellt sind, daß 3. die lichtundurchlässigen Teile einschließlich der den Verschlußfiügeln entsprechenden Sektoren als Spiegel hergerichtet sind, und daß q.. auf einer Seite der Verschlußscheibe taschenartige Luftfänger aufgesetzt sind, die die sich fangende Luft als Kühlstrom gegen die lichtdurchlässigen Teile leiten.Shutter for cinematographs designed as fire protection means. If parts of the film are shown in a standing projection, it must be in the picture window Part of the illustrated book protected against the heat of the light source as extensively as possible will. To a large extent, a device seems to do justice to this task to be able to use the shutter disc to cover the picture change and briefly Darken the still image with a 'heat filter and cooling device- united for the picture window and also cools itself. This is made possible by that one designed as a fan, between the condenser and the image window as close as possible attached circumferential locking disc so that it r. the entire beam path of the condenser except for the bundle assigned to the image window covers, so only ring-shaped pieces are translucent, that 2. the translucent Parts are designed as heat filters, for example by taking out the heat rays highly absorbent, but translucent body, such as. B. iron oxide glass, are made that 3. the opaque parts including the locking wings corresponding sectors are prepared as a mirror, and that q .. on one side pocket-like air catchers are placed on the closure disc, which catches Direct air as a cooling flow against the translucent parts.

Claims (1)

PATENT-ANspRUcH: Sich selbst und die Bildfenstergegend durch Luftströme kühlende, das Bildfenster gegen Wärmestrahlen schützende, zwischen Kondensor und Bildfenster angeordnete, als Ventilator ausgebildete umlaufende Verschlußscheibe für Vorführungskinematographen, dadurch gekennzeichnet daß z. die Seheibe den gesamten Strahlengang bis auf das dem Bildfenster zugeordnete Bündel abdeckt, daß 2. die Lichtdurchtrittsöffn.ungen die Form von Ringstücken haben und mit die Wärmestrahlen äbsorbierenden,.aber lichtdurchlässigen Stoffen abgedeckt sind, daß 3. die lichtundurchlässigen Teile einschließlich der Verschlußflügel als Spiegel hergerichtet sind, und daß d:. passend geformte, taschenartige Vorsprünge während der Drehung Luft in sich fangen ' und als Kühlstrom gegen die lichtdurchlässigen Teile leiten.PATENT CLAIM: yourself and the picture window area through air currents cooling, protecting the picture window against heat radiation, between the condenser and Circumferential sealing disk arranged as a fan and arranged as a picture window for demonstration cinematograph, characterized in that, for. the whole thing Beam path covers up to the bundle assigned to the image window that 2. the Lichtdurchtrittsöffn.ungen have the shape of ring pieces and with the heat rays Absorbing, but translucent materials are covered, that 3. the opaque Parts including the shutter wing are prepared as a mirror, and that d :. appropriately shaped, pocket-like projections air in itself during rotation catch 'and direct as a cooling flow against the translucent parts.
DE1920350473D 1920-02-17 1920-02-17 Locking disc for cinematographs designed as fire protection means Expired DE350473C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE350473T 1920-02-17

Publications (1)

Publication Number Publication Date
DE350473C true DE350473C (en) 1922-03-18

Family

ID=6262289

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1920350473D Expired DE350473C (en) 1920-02-17 1920-02-17 Locking disc for cinematographs designed as fire protection means

Country Status (1)

Country Link
DE (1) DE350473C (en)

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