File:IBM Selectric II typewriter.ogv

IBM_Selectric_II_typewriter.ogv ‎(file size: 30.41 MB, MIME type: application/ogg)

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	Date/Time	Dimensions	User	Comment
current	21:59, 16 November 2010	(30.41 MB)	Hammack	== {{int:filedesc}} == {{Information \|Description={{en\|1=Bill Hammack uses slow motion video (high-speed camera) to show the motion of the type element of an IBM Selectric II typewriter. He described the mechanical "whiffletree" mechanism that does digi

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