I agree with you sometimes the management names only appear, but the Heidoscop general design was based on the Voigtländer Stereflekstocop from 1914 (see the photograph) and Heidecke worked at R&D for Voigtländer, not the Simmon brothers. The Heidoscop was not "invented", it was not a new camera type like the Omega 120 or the _compact_ Rolleiflex TLR (TLR cameras exist from the XIXth century), if the Simmon brothers had some contribution to the Heidoscop it could only be very minor really. Carlos 2010/11/8 Edward Meyers <aghalidebw@xxxxxxxxx>: > Carlos, > > As far as I know, the Simmons brothers were workers in the factory, not > management, so their name would not have been on the design. > > Ed > > > On Mon, Nov 8, 2010 at 10:28 AM, CarlosMFreaza <cmfreaza@xxxxxxxxx> wrote: >> >> 2010/11/8 Edward Meyers <aghalidebw@xxxxxxxxx>: >> > Carlos, >> > >> > The Simmons Brothers actually invented the Heidoscop in Germany, working >> > for >> > Franke & Heidecke. They then moved to the U.S. >> >> Ed, I'm afraid you are wrong, the Heidoscop is a stereo camera showing >> nothing very special regarding other stereo cameras from the same >> time, it has a clear link with the Voigtländer Stereflektoscop from >> 1914, designed in part by R Heidecke when he worked for Voigtländer, >> Heidecke needed to circumvent his previous designs patented for >> Voigtlämder and then he developed the new reflex finder D.R.G.M. >> 751883 and a new air bracket stereo shutter, D.R.G.M. 779426; the >> Heidescop was developed around the Heidecke´s shutter and the >> Heideckes's reflex viewfinder. You can read several details about the >> Heidoscop development in the Rollei Report 1 where the Simmon brothers >> are not mentioned. >> This is the Voigtländer Stereflekstocop from 1914, you can see that >> the same mind (Heidecke) is behind the Heidoscop design (" ...this >> Voigtländer was the godfather of the first Heidoscop altough it was >> not a copy..." Prochnow RR 1, page 2-38) : >> http://www.lungov.com/wagner/c/026c.html >> >> Carlos >> --- >> Rollei List >> >> - Post to rollei_list@xxxxxxxxxxxxx >> >> - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' >> in the subject field OR by logging into www.freelists.org >> >> - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with >> 'unsubscribe' in the subject field OR by logging into www.freelists.org >> >> - Online, searchable archives are available at >> //www.freelists.org/archives/rollei_list >> > > --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list