AT135792B - Film switching device for roll film cameras. - Google Patents

Film switching device for roll film cameras.

Info

Publication number
AT135792B
AT135792B AT135792DA AT135792B AT 135792 B AT135792 B AT 135792B AT 135792D A AT135792D A AT 135792DA AT 135792 B AT135792 B AT 135792B
Authority
AT
Austria
Prior art keywords
film
switching device
stop
cameras
roll
Prior art date
Application number
Other languages
German (de)
Inventor
Paul Franke
Reinhold Heidecke
Original Assignee
Paul Franke
Reinhold Heidecke
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 Paul Franke, Reinhold Heidecke filed Critical Paul Franke
Application granted granted Critical
Publication of AT135792B publication Critical patent/AT135792B/en

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Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 



   Bei Rollfilmkameras ist es bekannt, den Film mittels einer verschwenkbaren Handkurbel zu schalten. 



  Hiebei sind Vorrichtungen vorgesehen, welche die jeweilige Grösse des Hubes der Handkurbel entsprechend dem wachsenden Durchmesser der Filmaufwickelspule regeln. Bei all diesen bekannten Vorrichtungen ist ein fester Anschlag, durch welchen die Anfangsstellung bzw. der   Rückhub   der Handkurbel festgelegt wird und ein beweglicher Anschlag zur Begrenzung des Kurbelhubes vorgesehen. 



   Die Erfindung besteht nun darin, dass ausser dem sich verändernden Transporthub der Rückhub der Filmkurbel einstellbar ist. Dies kann dadurch erreicht werden, dass der bisher feste Anschlag einstellbar ausgebildet ist oder dass zwischen dem festen Anschlag im Kameragehäuse und dem korrespondierenden Anschlag an der Filmkurbel ein einstellbares Anschlagglied geschaltet werden kann. 



   In der Zeichnung ist die Erfindung schematisch dargestellt, u. zw. zeigt Fig. 1 eine Ausführungsform, Fig. 2 eine zweite Ausführungsform. 
 EMI1.2 
 

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 ausgebildet ist, so dass beispielsweise der erste Teil dem Ausgleich der verschiedenen   Filmarfell   dienen könnte, während die zweite Hälfte mit den grösseren Breiten zur Änderung der Formate Verwendung findet. In gleicher Weise kann auch die Einstellbarkeit des Anschlages 2'gemäss Fig. 1 ausgebildet sein. 



   PATENT-ANSPRÜCHE :
1. Filmschaltvorrichtung für Rollfilmkameras mit einer verschwenkbaren Handkurbel und einer Regelung der Spulenwicklung durch Veränderung des Winkelausschlages der Handkurbel mittels eines sich verstellenden Anschlages, dadurch gekennzeichnet, dass ausser dem den Transporthub regelnden Anschlag   (3)   auch der die Anfangsstellung und damit den   Kurbelrlickhub   bestimmende Anschlag (2) einstellbar ausgebildet ist (Fig. 1).



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 EMI1.1
 



   In roll film cameras it is known to switch the film by means of a pivotable hand crank.



  Devices are provided here which regulate the respective size of the stroke of the hand crank in accordance with the growing diameter of the film take-up spool. In all of these known devices, a fixed stop is provided by which the starting position or the return stroke of the hand crank is set, and a movable stop is provided to limit the crank stroke.



   The invention consists in that, in addition to the changing transport stroke, the return stroke of the film crank is adjustable. This can be achieved in that the previously fixed stop is designed to be adjustable or that an adjustable stop element can be switched between the fixed stop in the camera housing and the corresponding stop on the film crank.



   In the drawing, the invention is shown schematically, u. Between Fig. 1 shows an embodiment, Fig. 2 shows a second embodiment.
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 is designed so that, for example, the first part could be used to compensate for the different film heads, while the second half with the larger widths is used to change the formats. The adjustability of the stop 2 ′ according to FIG. 1 can also be designed in the same way.



   PATENT CLAIMS:
1. Film switching device for roll film cameras with a swiveling hand crank and a regulation of the coil winding by changing the angular deflection of the hand crank by means of an adjusting stop, characterized in that in addition to the stop (3) regulating the transport stroke, the stop (3) which determines the starting position and thus the crank lever stroke ( 2) is designed to be adjustable (Fig. 1).

 

Claims (1)

2. Filmschaltvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass zwischen einen die Anfangsstellung bzw. den Rückhub der Kurbel bestimmenden ortsfesten Ansehlag (2') und den Anschlag (5) an der Handkurbel ein einstellbares Anschlagglied (4) einschaltbar ist. EMI2.1 2. Film switching device according to claim 1, characterized in that an adjustable stop member (4) can be switched on between a fixed stop position (2 ') which determines the starting position or the return stroke of the crank and the stop (5) on the hand crank. EMI2.1
AT135792D 1932-02-26 1933-02-25 Film switching device for roll film cameras. AT135792B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE135792X 1932-02-26

Publications (1)

Publication Number Publication Date
AT135792B true AT135792B (en) 1933-12-11

Family

ID=5666106

Family Applications (1)

Application Number Title Priority Date Filing Date
AT135792D AT135792B (en) 1932-02-26 1933-02-25 Film switching device for roll film cameras.

Country Status (1)

Country Link
AT (1) AT135792B (en)

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