DE344667C - - Google Patents
Info
- Publication number
- DE344667C DE344667C DENDAT344667D DE344667DA DE344667C DE 344667 C DE344667 C DE 344667C DE NDAT344667 D DENDAT344667 D DE NDAT344667D DE 344667D A DE344667D A DE 344667DA DE 344667 C DE344667 C DE 344667C
- Authority
- DE
- Germany
- Prior art keywords
- cooling air
- picture window
- film
- movable part
- fixed
- 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
Links
- 238000001816 cooling Methods 0.000 claims description 5
- 210000001138 Tears Anatomy 0.000 description 1
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)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
Die Gefahr, daß bei kinematographischen Vorführungen, die durch die Projektionsmaschine laufenden Filmstreifen in Brand geraten, sobald der Film zum Stillstand kommt oder zerreißt, ist bekannt. Diesen Gefahren abzuhelfen dienen zwei Arten von Feuerschutzvorrichtungen. Man kann auf mechanischem Wege in den Gefahrmomenten .die Bestrahlung des Bildbandes unterbrechen.The danger of the film strips running through the projection machine on fire during cinematographic presentations advised as soon as the film comes to a standstill or tears is known. These dangers this can be remedied by two types of fire protection devices. One can mechanically in the dangerous moments .interrupt the irradiation of the illustrated book.
ίο Diese oft sehr komplizierten Vorrichtungen sind aber auch Störungen ausgesetzt. Man hat deshalb beim Bildfenster Kühlluft zugeführt, .um die Erwärmung herabzusetzen. Eine Einrichtung dieser Art soll gemäß derίο These devices are often very complicated but are also exposed to interference. Cooling air has therefore been added to the picture window, .to reduce the temperature rise. A device of this type should according to the
x5 Erfindung in der Weise abgeändert werden, daß die Kühlluft zwischen dem festen und dem beweglichen Teil des Bildfensters zugeführt wird. Es wird somit nicht nur der Film, sondern auch die mit diesem in Berührung kommenden Teile des Apparates gut gekühlt.x5 invention can be modified in such a way that that the cooling air is supplied between the fixed and the movable part of the picture window will. So not only does the film come into contact with it, but also those in contact with it The coming parts of the apparatus are well cooled.
Die Erfindung ist in der Zeichnung dargestellt, und zwar zeigt die Abbildung eine Ansicht von der Seite und Längsschnitt.The invention is illustrated in the drawing, specifically the figure shows a view from the side and longitudinal section.
Der Luftstrom wird in der Pfeilrichtung zwischen dem festen und dem beweglichen Teil a. l· des Bildfensters durchgeblasen, so daß der Film c und das Bildfenster gut gekühlt wird. Der Luftstrom kann mit einem Exhaustor oder Blasebalg erzeugt werden.The air flow is in the direction of the arrow between the fixed and movable part a. l · the picture window blown through, so that the film c and the picture window are well cooled. The air flow can be generated with an exhaustor or bellows.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE344667C true DE344667C (en) |
Family
ID=573371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT344667D Active DE344667C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE344667C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257695A (en) * | 1979-03-19 | 1981-03-24 | Eastman Kodak Company | Film projection gate |
-
0
- DE DENDAT344667D patent/DE344667C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257695A (en) * | 1979-03-19 | 1981-03-24 | Eastman Kodak Company | Film projection gate |
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