Ricoh Synchrofax
Ricoh Synchrofax is a Japanese dictating machine from 1959, reissued in 1974 as the 3M Sound Page (model 627AA and 627AG) as official teaching material in the US-state of Oklahoma.[1] It is also known as sound paper. Inventor Sakae Fujimoto filed the patents US3074724A and US3046357A in 1959.[2][3]
Technology
The device produced by Ricoh uses bottom side magnetic coated paper, positioned by three perforations on three pins on device. A tape head on a rotating disc is spirally moved from outside to inside. Up to four minutes can be recorded per sheet. Microphone, headphones and monitor jacks are 3.5s plugs.[4]
The device is 12.555 lb or 5.7 kg, has 11 transistors and dimensions of 10.6×5.5×14.8 inch, which equal 270×140×375 mm.[5]
In 1973, the 3M device for schools cost US$299,[1] which would be $2052 today.
References
- ^ a b For teachers – pictures that talk, Popular Science, Ausgabe Mai 1973, S. 94
- ^ "Patent US3074724 - Apparatus for positioning recording and recorded sheets on a magnetic recorder and reproducer". Google Books. Sakae Fujimoto, Nihon Denki Bunka Kogyo Kabush, Riken Kogaku Kogyo Kabushiki K. 1960-09-14.
{{cite journal}}: CS1 maint: others (link) - ^ "Patent US3046357 - Magnetic recording and reproducing machine". Google Books. Sakae Fujimoto, Nihon Denki Bunka Kogyo Kabush, Riken Kogaku Kogyo Kabushiki K. 1960-09-07.
{{cite journal}}: CS1 maint: others (link) - ^ Techmoan: RetroTech: Recordable Paper - The 3M Sound Page, YouTube, 12 April 2018
- ^ Synchrofax R.P at the Radio Museum, retrieved 22 April 2018
External links
- Techmoan: RetroTech: Recordable Paper - The 3M Sound Page, YouTube, 12 April 2018