http://www.brockeng.com/mechanism/
http://www.fi.edu/pieces/knox/automaton/simple.htm
http://www.fi.edu/pieces/knox/automaton/cams.htm
http://www.mikids.com/Smachines.htm
http://www.keveney.com/Engines.html
http://www.sirinet.net/~jgjohnso/simple.html
State of California Technology Education Standards Grades Seven Through Twelve Warning!! This link will download a several hundred page PDF file. http://www.cde.ca.gov/re/pn/fd/documents/careertechstnd.pdf
Those NASA people! it doesn't get any better than this! http://www.grc.nasa.gov/WWW/K-12/airplane/shortp.html
Trigonometery puzzles for the machine shop set http://www.stirlingsouth.com/richard/math.htm
A great U.K. page on six types of motions, with examples. http://www.robives.com/mechs