DE337415C - Film switching mechanism for demonstration cinematograph - Google Patents
Film switching mechanism for demonstration cinematographInfo
- Publication number
- DE337415C DE337415C DE1920337415D DE337415DD DE337415C DE 337415 C DE337415 C DE 337415C DE 1920337415 D DE1920337415 D DE 1920337415D DE 337415D D DE337415D D DE 337415DD DE 337415 C DE337415 C DE 337415C
- Authority
- DE
- Germany
- Prior art keywords
- switching mechanism
- axes
- rollers
- roller
- film
- 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
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
- G03B1/00—Film strip handling
- G03B1/18—Moving film strip by means which act on the film between the ends thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection-Type Copiers In General (AREA)
Description
Bei kinematographischen Vorführungsapparaten ist es zwecks größter Schonung der Filme von besonderer Wichtigkeit, daß der Film die Transporträder (Stifträder) in recht großem Bogen umfaßt, damit eine möglichst große Anzahl Stifte gleichzeitig in den Film eingreift und an dem Transport teilnimmt. Andererseits wird die Forderung erhoben, den Film leicht und schnell in die Transporteinrichtung einlegen bzw. aus derselben herausnehmen zu können, ohne ihn hierbei Beschädigungen auszusetzen.With cinematographic demonstration equipment In order to protect the films as much as possible, it is of particular importance that the film has the transport wheels (pin wheels) in the right position large sheet, so that as large a number of pins as possible in the film at the same time intervenes and takes part in the transport. On the other hand, the demand is made insert and remove the film from the transport device easily and quickly without exposing it to damage.
Es sind nun bereits Vorrichtungen bekannt, bei welchen die den Film an die Transporträder andrückenden Rollen von schwenkbaren Armen getragen werden, welche beim Einlegen der Filme bzw. Herausnahme derselben aus dem Vorführungsapparat zurückgeklappt werden. Diese Arme tragen jedoch jeweils nur ein Rollenpaar und erfordert deshalb das Zurückklappen der verschiedenen Arme einen größeren Zeitaufwand. There are now devices are already known in which the film to the Transport wheels pressing rollers are supported by pivotable arms, which folded back when inserting the films or removing them from the projection apparatus will. However, these arms each carry only one pair of rollers and therefore require the different ones to be folded back Arms a greater expenditure of time.
Gegenstand der Erfindung ist die Anordnung zweier je mit einem Andrückrollenpaar versehenen, an einem gemeinsamen schwenkbaren Arm gelagerten Rahmen. Einer dieser Rahmen trägt das gegen die Malteserkreuzrolle drückende Rollenpaar, während auf dem anderen das auf die Nachwickelrolle drükkende Rollenpaar angeordnet ist. Beide Rahmen sind jeder für sich drehbar an einem gemeinsamen Halter angebracht und mit Blattfedern versehen, deren Druck durch die entsprechenden Rollenpaare auf die Malteserkreuz- sowie auf die Nachwickelrolle radial zu deren Achsen übertragen wird.The invention relates to the arrangement of two, each with a pair of pressure rollers provided frame mounted on a common pivotable arm. One of these The frame carries the pair of rollers pressing against the Maltese cross roller, while on the other the pair of rollers pressing on the rewinding roller is arranged. Both frames can be rotated individually attached to a common holder and provided with leaf springs, their pressure through the corresponding pairs of rolls on the Maltese cross and on the rewind roll is transmitted radially to their axes.
Die Erfindung ist in der schematischen Zeichnung beispielsweise dargestellt, und zwar bedeutet d den Film, e die Malteserkreuzrolle und f die untere Transportrolle.The invention is shown in the schematic drawing, for example, namely d denotes the film, e the Maltese cross roller and f the lower transport roller.
Die Andrückrollen a, a, die in einem um die Achse b drehbaren Rahmen c gelagert sind und den Film d gegen die Malteserkreuzrolle e drücken, sowie die Andrückrollen a, at, die in dem um die Achse bT drehbaren Rahmen C1 gelagert sind und den Film gegen die untere Transportrolle f drücken, sind mit den Achsen b und B1 an einem gemeinsamen Halter g gelagert, der seinerseits um die unterhalb der Rolle f liegende Achse h zwischen den Anschlägen i und I1 schwenkbar ist. Zum Einlegen des Films wird der Halter g gegen den Anschlag I1 gelegt und dort durch die Wirkung der Kippfeder k gehalten. Der ganze Raum in der Nähe der Filmrollen e und f ist somit frei, so daß der Film bequem eingelegt werden kann. Liegt der Film richtig auf den Rollen, so wird der Halter g wieder auf die Rolle/ zu, gegen den Anschlag i geklappt und die Andrückrollen nehmen die gezeichnete Arbeitsstellung ein, wobei sie die Filmrollen e und f in großem Bogen umfassen, somit möglichst viel Stifte zum Eingriff bringen.The pressure rollers a, a, which are mounted in a frame c rotatable about the axis b and press the film d against the Geneva cross roller e, as well as the pressure rollers a, a t , which are mounted in the frame C 1 rotatable about the axis b T and pressing the film against the lower transport roller f, b are with the axes B and stored for 1 g on a common holder, in turn, to below the roller axis lying f h i between the stops and I 1 is pivotable. To insert the film, the holder g is placed against the stop I 1 and held there by the action of the toggle spring k . The entire space in the vicinity of the film rolls e and f is thus free, so that the film can be loaded comfortably. If the film lies correctly on the rollers, the holder g is folded back towards the roller / towards the stop i and the pressure rollers assume the working position shown, encompassing the film rollers e and f in a large arc, thus as many pens as possible bring into action.
Um die genaue Einstellung der Andrückrollen a, (Z1 gegenüber den Filmrollen e, f bei der Montage zu ermöglichen, sind die Achsen b3 &1 verstellbar in dem Halter g befestigt, z. B. mittels Exzenter. Auch könnenIn order to enable the precise setting of the pressure rollers a, (Z 1 with respect to the film rollers e, f during assembly, the axes b 3 & 1 are adjustably fastened in the holder g , for example by means of an eccentric
die Andrückrollenrahmen c, C1 mittels der Langlöcher derart auf ihren Achsen b, b1 sitzen, daß sie radial gegen die betreffende Filmrolle e bzw. / verschiebbar sind. Durch Blattfedern I1 die auf den Achsen b, b1 verstellbar sitzen, erfahren die Rahmen c, C1 dabei einen radialen Druck in Richtung gegen die betreffende Filmrolle.the pressure roller frames c, C 1 sit by means of the elongated holes on their axes b, b 1 in such a way that they are radially displaceable against the film roll in question e or /. By leaf springs I 1 which are adjustable on the axes b, b 1 , the frames c, C 1 experience a radial pressure in the direction against the film roll in question.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE337415T | 1920-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE337415C true DE337415C (en) | 1921-05-31 |
Family
ID=6221446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1920337415D Expired DE337415C (en) | 1920-02-28 | 1920-02-28 | Film switching mechanism for demonstration cinematograph |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE337415C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2586600A (en) * | 1946-09-07 | 1952-02-19 | Rca Corp | Interlocked pressure roller and pad roller |
US2675973A (en) * | 1949-06-24 | 1954-04-20 | Int Electronics Co | Equipment for use with magnetic tape records |
US2782041A (en) * | 1951-01-12 | 1957-02-19 | Internova Trust | Magnetic sound recording and reproducing device |
-
1920
- 1920-02-28 DE DE1920337415D patent/DE337415C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2586600A (en) * | 1946-09-07 | 1952-02-19 | Rca Corp | Interlocked pressure roller and pad roller |
US2675973A (en) * | 1949-06-24 | 1954-04-20 | Int Electronics Co | Equipment for use with magnetic tape records |
US2782041A (en) * | 1951-01-12 | 1957-02-19 | Internova Trust | Magnetic sound recording and reproducing device |
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