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DE367871C - Take-up device for picture tapes on cinematographs - Google Patents

Take-up device for picture tapes on cinematographs

Info

Publication number
DE367871C
DE367871C DEL53137D DEL0053137D DE367871C DE 367871 C DE367871 C DE 367871C DE L53137 D DEL53137 D DE L53137D DE L0053137 D DEL0053137 D DE L0053137D DE 367871 C DE367871 C DE 367871C
Authority
DE
Germany
Prior art keywords
friction
take
cinematographs
reel
picture
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
DEL53137D
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.)
Individual
Original Assignee
Individual
Publication date
Priority to DEL53137D priority Critical patent/DE367871C/en
Application granted granted Critical
Publication of DE367871C publication Critical patent/DE367871C/en
Expired 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
    • G03B1/00—Film strip handling
    • G03B1/40—Film strip handling embodying frictional coupling or clutches

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Winding Of Webs (AREA)

Description

S67871S67871

Gegenstand der Erfindung ,ist eine Vorrichtung zum Aufwickeln der Bildbänder an kiinematographischen Aufnahme- und Wiedergäbeapparaten. The subject of the invention is a device for winding the picture tapes on cinematographic Recording and playback devices.

Bei den bisher üblichen derartigen Apparaten wird das Bildband mittels Reibungsgetriebe mit gleichbleibendem Anpressungsdruck aufgewickelt. Am Anfang reicht diese Reibung vollkommen aus, .um die Spule mit demWith the devices of this type that have been customary up to now, the picture book is driven by means of friction gears wound with constant contact pressure. In the beginning, this friction is enough completely off. around the coil with the

ίο aufzurollenden Film anzutreiben. Mit dem Aufwickeln wächst aber das Gewicht der Spule und demgemäß ihr Zapfenwiiderstand, so daß das Reibungsgetriebe anfängt zu gleiten, weil es die Widerstände nicht mehr zu überwinden vermag.ίο to drive the film to be rolled up. With the Winding increases the weight of the bobbin and accordingly its pin resistance, so that the friction gear begins to slide because the resistances are no longer too able to overcome.

Die Erfindung betrifft eine Aufwickelvorrichtung, bei der der Anpressungsdrudc, also auch die Übertragungskraft des Reiibungsgetriebes mit dem Spulengewicht zunimmt, so daß Widerstandskraft unidi Antriebskraft dauernd im gleichen Verhältnis zueinander stehen.The invention relates to a winding device in which the Anpressungsdrudc, so the transmission force of the friction gear increases with the weight of the spool, so that the resistance force and the driving force are constantly in the same ratio to one another stand.

Den Reibungsdruck dfem Gewicht der Spule anzupassen ist an sich bereits bekannt,Adjusting the frictional pressure to the weight of the coil is already known per se,

z. B. für Filmkopierinasclhinen. Gegenstand der Erfindung ist eine besonders für Aufnahme und Wiedergabeapparate geeignete Ausführungsform einer naah dieisem Prinzip arbeitenden Aufwickelvorrichtung.z. B. for film copying lines. The subject of the invention is a particularly for recording and playback apparatus a suitable embodiment of a winding device operating on the basis of this principle.

Auf der Zeichnung ist der Gegenstand der Erfindung in zwei Ansichten veranschaulicht.In the drawing, the subject matter of the invention is illustrated in two views.

Zwei in zueinander senkrechten EbenenTwo in mutually perpendicular planes

stehende runde Scheiben c und d bilden: das Reibungsgetriebe zum Antrieb der die FiIm-standing round disks c and d form: the friction gear for driving the

,35 spule α tragenden Aufwickelachse /. Um ein geeignetes Übersetzungsverhältnis von der treibenden Welle g auf die Adhse/ zu schaffen, haben die beidien Scheiben verschiedene Durchmesser. Die wagerechte Achse / ist nun so angeordnet, daß sie in senkrechter Ebene beweglich ist. Zu dem Zwieak ist ihre Lagerschale s in dem Bock i senkrecht verschiebbar gelagert. Die mit der Achse/ verbundene Scheibe c wird also durch ihr eigenes Gewicht und das der Aufwic'kelspule gegen die antreibende Scheibe d gedrückt. Mit zunehmender Aufwickelung des Bildbandes steigt das Gewicht 'der 'Spule, also auch der AnpTessungsd'ruck der Reibungsscheiben, wodurch in gleichem Maße die Übertragungskraft sich vergrößert. Je mehr also mit steigendem Gewicht der Filmspule der Drehwiderstand sich erhöht, desto größer wird auch die Übertragungskraft des Reibungsgetriebes., 35 reel α supporting take-up axis /. In order to create a suitable transmission ratio from the driving shaft g to the adapter /, the two disks have different diameters. The horizontal axis / is now arranged so that it can be moved in a vertical plane. To the Zwieak its bearing shell s is mounted in the bracket i so as to be vertically displaceable. The disk c connected to the axle / is therefore pressed against the driving disk d by its own weight and that of the take-up reel. With increasing winding of the picture tape, the weight of 'the' reel increases, so does the tensioning pressure of the friction disks, which increases the transmission force to the same extent. The more the resistance to rotation increases with the weight of the film reel, the greater the transmission force of the friction gear.

Claims (1)

Patent-Anspruch:Patent claim: Aufwickelvorrichtung für Filme an Aufnahme- und Vorführungsapparaten mit Antrieb durch ein Reibungsvorgelege, bei dem der 'Raibungsdruck immer proportional dem jeweiligen Gewicht der Filmspule ist, und bei dem die eine Reibungsscheiibe des Reibungsantrielbes und die mit ihr verbundene Spule für das Bildband vertikal beweglich in einem Führungsschlitten gelagert sind, dadurch gekennzeichnet, daß sich die Reibungsscheibe (c) mit dem jeweiligen Gewicht dier Filmspule (α) auf eine horizontal gelagerte AntriebsscheibeWinding device for films on recording and presentation devices with drive by a friction gear, in which the 'friction pressure is always proportional to the respective weight of the film reel, and in which the one friction disc of the friction drive and the reel connected to it for the picture tape are vertically movable in a guide carriage are stored, characterized in that the friction disc (c) with the respective weight of the film reel (α) on a horizontally mounted drive disc (d)(d) auflegt.hangs up. Hieizu ι Blatt Zeichnungen.Here are sheets of drawings.
DEL53137D Take-up device for picture tapes on cinematographs Expired DE367871C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL53137D DE367871C (en) Take-up device for picture tapes on cinematographs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL53137D DE367871C (en) Take-up device for picture tapes on cinematographs

Publications (1)

Publication Number Publication Date
DE367871C true DE367871C (en) 1923-01-27

Family

ID=7275172

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL53137D Expired DE367871C (en) Take-up device for picture tapes on cinematographs

Country Status (1)

Country Link
DE (1) DE367871C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921666C (en) * 1948-12-31 1954-12-23 Frieseke & Hoepfner Gmbh Drive device for the film take-up reel of cinema machines
DE943565C (en) * 1953-12-05 1956-05-24 Bauer Eugen Gmbh Device for motion picture playback

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921666C (en) * 1948-12-31 1954-12-23 Frieseke & Hoepfner Gmbh Drive device for the film take-up reel of cinema machines
DE943565C (en) * 1953-12-05 1956-05-24 Bauer Eugen Gmbh Device for motion picture playback

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