[rollei_list] Re: Rollei Patents
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Mon, 29 Mar 2010 20:17:11 -0300
Interesting work Richard, the Rolleiflex had hardly appeared when
there was a famous legal case in Braunschweig between Voigtländer and
their former employees Paul Franke and Reinhold Heidecke, I don't
recall details now but results were that Voigtländer was free to make
a TLR, however F&H could preserve their main patents for the Rollei
TLR exclusive use; the Voigtländer TLR cameras never could be
competition for the Rolleiflex, one of the Rolleiflex compactness
secret was the film upper spool position and there was a patent
keeping the rights for F&H.-
Carlos
2010/3/29 Richard Knoppow <dickburk@xxxxxxxxxxxxx>:
> For some reason I never thought to search for patents belonging to F&H
> before, I began last night, using Google Patents to search for "Franke
> Heidecke" and turned up a ton of them. These are all post 1946. I will try
> other key words to see if I can find earlier ones.
> Among the patents I found were those covering the Rolleiflex winding
> mechanism, the coupling for the light meter, the coupling for the iris and
> shutter speeds, the rangefinder attachment, the light baffles, the
> Rolleifix, the lock for the back/bottom, and one issued to Claus Prochnow
> for a flashgun. I downloaded probably fifty and will search for more.
> Among the patents are some pertaining to a camera evidently never made
> which had the film running from side to side, I think Voigtlander made such
> a camera. There are also a couple for a method of making a camera that takes
> 35mm and some other, larger, format simultaneously and for a 35mm stereo
> camera. Also for an anti-reflection coating for light filters. The latter
> could be applied to lenses but that is not made specific in the patent
> specification.
>
> --
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
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