AT91726B - Cinematographic demonstration device with cooling device for the purpose of fire prevention in the event of prolonged exposure to the flammable film tape. - Google Patents

Cinematographic demonstration device with cooling device for the purpose of fire prevention in the event of prolonged exposure to the flammable film tape.

Info

Publication number
AT91726B
AT91726B AT91726DA AT91726B AT 91726 B AT91726 B AT 91726B AT 91726D A AT91726D A AT 91726DA AT 91726 B AT91726 B AT 91726B
Authority
AT
Austria
Prior art keywords
cinematographic
event
fire prevention
prolonged exposure
film tape
Prior art date
Application number
Other languages
German (de)
Original Assignee
Aeg
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 Aeg filed Critical Aeg
Application granted granted Critical
Publication of AT91726B publication Critical patent/AT91726B/en

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Landscapes

  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Facsimile Scanning Arrangements (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Kinematographischer   Yorführungsapparat   mit Kühlvorrichtung zwecks Brandverhiitung bei längerer Bestrahlung des feuergefährlichen Filmbandes. 



   Bei den bisherigen Kino-Vorführungsapparaten mit Kühlvorrichtungen für das Filmband wird zwischen Lichtquelle und Filmband eine mit einer geeigneten   Flüssigkeit gefüllte Küvette   bzw. ein Draht- 
 EMI1.1 
   Licht-bzw. Stromstärken genügt jedoch   diese Einrichtung allein nicht, um den Film vor Entzündung zu   schützen. Erfindungsgemäss   wird ausser den erwähnten   Einrichtungen eine ständig laufende Blende     zwischen Lichtquelle und Bildband   angeordnet. Hiedurch wird erreicht, dass das Bildband während der   Dunkelpausen   stets abgedeckt ist und nicht wie bisher üblich. dauernd beleuchtet und erwärmt wird. 



  Der Gegenstand der Erfindung bewirkt eine Herabsetzung der Bildbanderwärmung um reichlich 50% bei vollständig gleichbleibender Bildhelligkeit. 



   Gleichzeitig wird durch diese Anordnung die   Erwärmung   der   Bildbandführung   auf ein Minimum herabgesetzt und somit ein Kleben des Bildbandes in der Führung und die dadurch bedingte Beschädigung desselben verhindert. 



   Um eine weitere Herabsetzung der Erwärmung des Bildbandes in der Bildbandführung zu erreichen. wird erfindungsgemäss die Blende als Ventilator ausgebildet und derart angeordnet, dass die Luft vom Bildband bzw. von der   Bildbandführung   abgesaugt und in Richtung gegen die Küvette gedrückt wird, so dass in der Nähe des Bildbandes ein ständiger Luftzug herrscht. Gleichzeitig wird der sich ständig bildende Bildbandstaub durch den Ventilator dauernd abgesaugt und dadurch eine Verstaubung des Werkes ver- 
 EMI1.2 
 



   PATENT-ANSPRÜCHE :
1. Kinematographischer Vorführungsapparat mit Kühlvorrichtung zwecks Brandverhütung bei längerer Bestrahlung des fenergefährlichen Filmbrandes, dadurch gekennzeichnet, dass zwischen Lichtquelle und Bildband eine aus einem wärmeabsorbierenden und lichtdurchlässigen Mittel (z. B. Flüssigkeitsküvette) und einer ständig laufenden als Ventilator ausgebildeten Blende bestehende Vorrichtung, zur Verhütung der unzulässigen   Erwärmung   des Bildbandes, angeordnet ist. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Cinematographic projection apparatus with cooling device for the purpose of fire prevention in the event of prolonged exposure to the flammable film tape.



   In the previous cinema projection apparatus with cooling devices for the film tape, a cuvette filled with a suitable liquid or a wire is placed between the light source and the film tape.
 EMI1.1
   Light or However, current strengths alone are not sufficient for this device to protect the film from ignition. According to the invention, in addition to the devices mentioned, a continuously running screen is arranged between the light source and the picture tape. This ensures that the photo book is always covered during the dark breaks and not as was previously the case. is continuously lit and heated.



  The object of the invention brings about a reduction in the heating of the image tape by a good 50% while the image brightness remains completely the same.



   At the same time, this arrangement reduces the heating of the picture tape guide to a minimum and thus prevents the picture tape from sticking in the guide and the damage caused by it.



   To achieve a further reduction in the heating of the illustrated book in the illustrated book guide. According to the invention, the screen is designed as a fan and arranged in such a way that the air is sucked off from the picture book or from the picture book guide and pressed in the direction of the cuvette so that there is a constant draft in the vicinity of the picture book. At the same time, the constantly forming picture tape dust is continuously sucked off by the fan, which prevents the work from becoming dusty.
 EMI1.2
 



   PATENT CLAIMS:
1. Cinematographic demonstration apparatus with cooling device for the purpose of fire prevention in the event of prolonged exposure to the fener-dangerous film fire, characterized in that a device consisting of a heat-absorbing and light-permeable means (e.g. liquid cuvette) and a continuously running screen designed as a fan for prevention between the light source and the picture tape the impermissible heating of the illustrated book.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

2. Kinematographischer Vorführungsapparat nach Anspruch 1, dadurch gekennzeiehnet, dass die als Ventilator ausgeführte Blende die Luft vom Bildband absaugt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. 2. Cinematographic demonstration apparatus according to claim 1, characterized in that the diaphragm designed as a fan sucks the air from the picture book. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT91726D 1921-12-19 1921-12-19 Cinematographic demonstration device with cooling device for the purpose of fire prevention in the event of prolonged exposure to the flammable film tape. AT91726B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT91726T 1921-12-19

Publications (1)

Publication Number Publication Date
AT91726B true AT91726B (en) 1923-03-10

Family

ID=3611805

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91726D AT91726B (en) 1921-12-19 1921-12-19 Cinematographic demonstration device with cooling device for the purpose of fire prevention in the event of prolonged exposure to the flammable film tape.

Country Status (1)

Country Link
AT (1) AT91726B (en)

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