Can anybody help me find some primary sources on the typewriter?
These sites may have some things you can use.
http://site.xavier.edu/polt/typewriters/tw-history.html
http://www.ideafinder.com/history/inventions/typrwriter.htm
http://www.google.com/search?hl=en&rlz=1G1GGLQ_ENUS360&ie=ISO-8859-1&q=Christopher+Latham+Sholes+