[rollei_list] First F&H patent
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sun, 24 Oct 2010 11:56:50 -0300
Last August, during a discussion about a Rollei Stereo Image in this
list, it appeared the issue about the first Rollei TLR design
history, I wrote: "...the design became someway similar regarding the
Otto Fricke TLR design patented in 1919 that F&H bought from Mundt
&Otto Fricke to use the reflex viewfinder for the stereo cameras...",
I wrote it from memory based on the patent data mainly, but I read
again the explanation in the Report 1 looking for other info and facts
were more interesting; the 1919 patent about a " Photographic camera
with reflex finder" (DRGM 75 1863, Patent 1 for Rollei products in
Prochnow's books) was registered for Otto Fricke as I wrote, the main
improvement regarding previous TLR viewfinders designs was that the
viewing lens was faster than the taking lens making focusing more
critical and being viewing and taking lens image identical regarding
others parameters, it was applied for F&H Stereo and TLR cameras,
_however the true inventor was Reinhold Heidecke_, he and Paul Franke
were talking about to found a new photographic company when they still
were Voigtländer employees (up to January 1920) and from these
talkings Heidecke developed some technical ideas like that reflex
finder, Heidecke had registered several technical designs for
Voigtländer as technical head and he feared Voigtländer could claim
the reflex viewfinder patent as their own patent and then he asked
Otto Fricke, Patent Office partner, to register it; the patent was for
Fricke on December 28, 1919 (the patent register requires some time of
process).
F&H was authorized to work as a new company on December 10, 1919 and
then Otto Fricke on December 30, 1919 wrote a note to the Patent
Office saying that the inventors and proprietors of the patent
application were Paul Franke and Reinhold Heidecke.
This is the history about the first F&H patent according my sources.
Carlos
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