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Re: Geneva Mechanism

  • From: P3D Timothy Shih <tshih@xxxxxxxx>
  • Subject: Re: Geneva Mechanism
  • Date: Thu, 11 Jul 1996 23:04:30 -0700
>In the Photo-3D directory there is a GIF file for the Geneva Mechanism. What
>exactly is the Geneva Mechanism for ? Is is for film advance ?
>
>Sam
>
>
>
The Geneva Star movement is for 35mm projectors and cameras.  It transports
(starts and stops) the film and syncs the shutter.  I have on of these
movements out of a camera and it's a facinating piece of machinery.  You
crank it and it has two drive sprockets that transport the film.  If looking
at a camera (or projector) that has a Geneva Star movement, you will only
see two drive sprockets rotate intermittently.
I believe it actually was patented in  the 1890's.
hope this helps,
Tim Shih


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