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| View Original: | Skrifmaskin,_Thurbers_chirographer,_Nordisk_familjebok.png (1823x1285) | |||
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| Keywords: Skrifmaskin, Thurbers chirographer, Nordisk familjebok.png Thurber's Patent Printer an early prototype typewriter invented and patented by Charles Thurber Massachusetts USA in 1843 for use by the blind This is the drawing from US Patent No 3228 dated August 26 1843 Two of his innovations that are still used in mechanical typewriters today are a cylinder to carry the paper in a moveable carriage that advances with each letter typed and a mechanism to advance the paper by one line each time the carriage is returned Thurber never commercially developed this device and by the 1900s the prototype was in a Worcester museum For more information see http //www-03 ibm com/ibm/history/exhibits/modelb/modelb_informal html The typewriter an informal history 1977 IBM Archives and http //www todayinsci com/Events/Patent/Typewriter3228 htm Charles Thurber US Patent No 3228 Today in Science History From http //runeberg org/nfce/0633 html 1843 Charles Thurber Public domain - published in USA before 1923 PD-Ugglan Equipment for people with visual impairment Typewriters in art | ||||
