DE409823C - Film switching device for cinematographs - Google Patents

Film switching device for cinematographs

Info

Publication number
DE409823C
DE409823C DES66139D DES0066139D DE409823C DE 409823 C DE409823 C DE 409823C DE S66139 D DES66139 D DE S66139D DE S0066139 D DES0066139 D DE S0066139D DE 409823 C DE409823 C DE 409823C
Authority
DE
Germany
Prior art keywords
cinematographs
switching device
film switching
ring
toothed wheel
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
DES66139D
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
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 Individual filed Critical Individual
Priority to DES66139D priority Critical patent/DE409823C/en
Application granted granted Critical
Publication of DE409823C publication Critical patent/DE409823C/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
    • G03B1/00Film strip handling
    • G03B1/18Moving film strip by means which act on the film between the ends thereof

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)

Description

Zur Fortschaltung von Filmen in Vorführungskinematographen diente bislang fast ausschließlich das Malteserkreuzgetriebe. Seine mechanischen Nachteile sind hinreichend bekannt; sein größter technischer Nachteil besteht darin, daß die Zeitspanne für den Bildwechsel eine derart hohe ist, daß eine relativ lange Abdeckung des Bildes erforderlich wird, die ihrerseits wieder einen Licht- und Energieverlust bedeutet.Up to now, it has been used almost exclusively to advance films in screening cinematographs the Maltese cross gear. Its mechanical disadvantages are well known; its greatest technical disadvantage is that the time for the picture change is so high that a relatively long coverage of the image is required, which in turn means a loss of light and energy.

Bei der nachfolgend beschriebenen Vorrichtung erfolgt der Bildiwechsel in so kurzer Zeit, daß eine Abdeckung nicht unbedingt erforderlich wäre. Wenn trotzdem, zur Verbesserung der Bildwirkung ein Verschluß verwendet wird, kann dieser derart ausgestaltet werden, daß eine wesentliche Licht- und damit Energieersparnis gegenüber den für ein normales Malteserkreuz erforderlichen Verschlüssen erzielt wird. With the device described below, the image change takes place in such a short time Time that a cover was not absolutely necessary. If anyway, to improve the image effect a shutter is used, this can be designed in such a way that a substantial light and thus Energy savings compared to the closures required for a normal Maltese cross is achieved.

In der Zeichnung bedeutet:In the drawing means:

Abb. ι einen Längsschnitt durch die Anordnung, Fig. Ι a longitudinal section through the arrangement,

Abb. 2 einen Querschnitt durch den Rotationskörper 7, Abb. 3 einen Querschnitt durch Ring 6;Fig. 2 shows a cross section through the rotating body 7, Fig. 3 shows a cross section through ring 6;

Abb. 2 und 3 sind in Pfeilrichtung I gesehen. Figs. 2 and 3 are seen in the direction of arrow I.

Auf der beiderseits gelagerten Welle 1 sitzt frei tragend das Filmschaltrad 2 und zwischen den beiden Lagern 3 und 4 das mit zylindrischen Bünden versehene Zackenrad 5. Auf dem einen Bund sitzt mit Spiel der Ring 6, der mit dem Lager 3 fest verschraubt ist. Auf dem anderen Bund sitzt ebenfalls mit Spiel der Rotationskörper 7, der außerdem auf Welle 1 und im Lager 4 gelagert ist. Im Ring 6 und im Rotationskörper 7 sind keilförmige Ausfräsungen 8 angebracht, die zur Aufnahme von kleinen Wälzchen 9 dienen, welche durch Spiralfedern 10 in die Ausfräsungen hineingezogen werden. Diese Ausfräsungen sind, wie Abb. 2 und 3 zeigt, mit entgegengesetzten Schrägen versehen. An dem anderen Ende des Rotationskörpers 7 ist außerdem noch ein Hebel 8 oder irgendein anderes Schaltorgan angebracht, das beispielsweise durch eine Kurvenscheibe in eine absatzweise hin und her gehende Drehbewegung versetzt wird. Erfolgt die Drehbewegung nach der einen Seite, so wird der Rotationskörper 7 und vermittels der Wälzchen das Zackenrad 5 mit Welle 1 und Stiftrad 2 mitgenommen (Schaltperiode). Erfolgt die Bewegung des Hebels 8 in der anderen Richtung, so wird sich lediglich der Rotationskörper 7 mitdrehen, während das Zackenrad 5 und dabei das Stiftrad 2 durch die im Ring 6 befindlichen Wälzchen festgehalten wird (Stillstandsperiode). On the shaft 1, which is supported on both sides, the film indexing wheel 2 and between the two bearings 3 and 4, the toothed wheel provided with cylindrical collars 5. On the one collar sits with play of the ring 6, which is firmly screwed to the bearing 3. On the other federal government also sits with play of the body of revolution 7, which also is mounted on shaft 1 and in bearing 4. In the ring 6 and in the body of revolution 7 are wedge-shaped Cutouts 8 attached, which serve to accommodate small rollers 9, which are supported by spiral springs 10 in the cutouts get drawn into it. As shown in Figs. 2 and 3, these cutouts are provided with opposite bevels. To the the other end of the rotary body 7 is also a lever 8 or any one Another switching element attached, for example by a cam in a paragraph reciprocating rotary motion is offset. If the rotary movement is to one side, the body of revolution becomes 7 and by means of the rolling the toothed wheel 5 with shaft 1 and pin wheel 2 taken along (Switching period). If the lever 8 is moved in the other direction, only the rotary body 7 will move rotate while the toothed wheel 5 and the pin wheel 2 through those in the ring 6 Roll is held (standstill period).

Die Zacken am Zackenrad 5 dienen dazu, den Schaltweg genau zu begrenzen, was beispielsweise durch eine von Hebel 8 gesteuerte Sperrklinke geschehen kann.The prongs on the toothed wheel 5 are used to precisely limit the switching path, which is, for example can be done by a pawl controlled by lever 8.

Claims (1)

Patent-Anspruch :Patent claim: Klinkengesperre mit zwei entgegengesetzt wirksamen freilaufartigen Mechanismen zur Fortschaltung von Filmen, dadurch gekennzeichnet, daß der eine Freilauf als Kupplung, der andere als Bremse angebracht ist.Ratchet lock with two oppositely effective freewheel-like mechanisms for advancing films, characterized in that one freewheel as a clutch, the other as a brake is appropriate. Abb.Fig. Abb. 2.Fig. 2. Abb. 3.Fig. 3.
DES66139D 1924-05-28 1924-05-28 Film switching device for cinematographs Expired DE409823C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES66139D DE409823C (en) 1924-05-28 1924-05-28 Film switching device for cinematographs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES66139D DE409823C (en) 1924-05-28 1924-05-28 Film switching device for cinematographs

Publications (1)

Publication Number Publication Date
DE409823C true DE409823C (en) 1925-02-13

Family

ID=7498580

Family Applications (1)

Application Number Title Priority Date Filing Date
DES66139D Expired DE409823C (en) 1924-05-28 1924-05-28 Film switching device for cinematographs

Country Status (1)

Country Link
DE (1) DE409823C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512486A (en) * 1944-09-26 1950-06-20 Fairchild Camera Instr Co Fore-and-aft aerial camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512486A (en) * 1944-09-26 1950-06-20 Fairchild Camera Instr Co Fore-and-aft aerial camera

Similar Documents

Publication Publication Date Title
DE102018004614B4 (en) Clutch and hand tools with a clutch
DE409823C (en) Film switching device for cinematographs
DE888679C (en) Self-winding watch with oscillating mass
DE514991C (en) Device for the periodic switching of machine parts
DE623272C (en) Freewheel clutch housing for right and left switching of automatic switches
DE703658C (en) Double-acting roller locking mechanism for motorcycle transmissions
DE414448C (en) Adding machine
DE451395C (en) Cinema engine with sinusoidal control disk for driving the shutter
DE321584C (en) Hand and foot motor for driving small electric power stations
DE553727C (en) Pre-tensioning device for electrical rotary switches with right and left gear and eccentric release for the jump lock
DE650645C (en) Device for engaging and disengaging the claw clutch of metal presses
DE731478C (en) Translator device for type printing telegraph receiver, in which the type wheel is set with the help of a series of interlocking planetary gears
DE4304544A1 (en) Drive device for an electrical power switch (power circuit breaker)
AT103585B (en) Writing device on periodically recording apparatus, especially electrical ones.
DE761878C (en) Registration device for integral values formed after a sliding period of time
DE516601C (en) Transmission
DE2615945C3 (en) Alarm device for clocks
DE1962091U (en) DRIVE DEVICE FOR DISCONNECTOR.
DE536093C (en) Impression button switch
DE400160C (en) Line or item counters for printing devices of calculating machines
AT321723B (en) Gripper plant
CH418705A (en) Switching device for the forward switching of the date stamp of a stamping machine
DE918304C (en) Reverse gear
DE1632975C (en) Fishing reel
DE402892C (en) Motorized drive for calculating machines