[rollei_list] Re: [rollei_list] Interesting Rollei info in Prochnow's Voigländer Reports
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Fri, 1 Dec 2006 12:05:25 -0300 (ART)
Hi Emmanuel:
I think you can find similar info in the
Rollei Report I, the issues about the patents between
Voigtländer and F&H are well explained, also the trial
between F&H and Voigtländer and the way Heidecke
handled the F&H stereo designs to circumvent his own
designs patented for Voigtländer, and there is a
complete explanation about the way the 1928 Rolleiflex
TLR prototypes were developed, the relationship with
the stereo cameras and the patents used for this TLR
and why Voigtländer couldn't develop a professional
compact TLR like the F&H model.-
All the best
Carlos
--- bigler@xxxxxxxx escribió:
> An interesting Rollei info in Prochnow's Voigländer
> Reports
>
> Logically, speaking here about vintage pre-1972
> Voigtländer equipment
> should be 100% off-topic here and therefore banned
> with the harshest
> severity.
>
> However, having succumbed to temptation of buying
> the 2 already
> published Voigtländer Reports (the 3-rd is due for
> 2007) by one of our
> favourite gurus, Claus Prochnow, I was pleased to
> find several
> historical Rollei-related stories unknown to me...
> but may be not not
> you !
>
> __Disclaimer__ : those of you who swear only by
> post-1981
> Rollei-Braunschweig-made cameras & equipment, please
> close your eyes
> and let the old guys chat a little ;-)
>
> The first story is that there has been a very
> limited series of R-TLRs
> fitted with a Voigtländer Skopar lens !
>
> The second story is related to how the ideas of the
> first R-TLR came.
> Claus P. has found several Voigtländer patents
> showing that several
> ideas that we naturally associate with the Rollei
> came in fact from
> Voigtländer where Reinhold Heidecke had been an
> employee for 20 years.
> the different ides are : saving space by putting
> film rolls in the
> space left empty in a rectangular box, and coupling
> a taking lens with a
> viewing lens, with or without a reflex mirror.
> Before WWI there was a
> twin lens non reflex (TLNR, we should create the
> acronym !!)
> Voigtländer plate camera and the Voigtländer
> stereoflektoskop is so
> close to a Rollei stereo camera or, later, to a TLR
> in its
> viewing/focusing principle that I wonder how F&H
> could be protected by
> a special patent !
>
> So the subtle thing is : did actually Heidecke
> propose the TLR design
> to Voigtländer before resigning and founding his
> company ? (this is
> suggested by some reading on the 'net, I am
> sceptical) What were
> actually the claims in patents that allowed the
> young F&H company to
> start without infringing voigtländer's patents ?
>
> It seems that Voigtländer's Brilliant could be
> marketed without
> infringing F&H patents simply because there was no
> ground glass in the
> viewer, but conversely, how did F&H could manage not
> to infringe prior
> Voigtländer's patents ?
>
> A fascinating story !!
>
> --
> Emmanuel BIGLER
> <bigler@xxxxxxxx>
> ---
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