Schmidt Coupling: [1] thomasnet.com
Constant Velocity Joint: [2] brighthubengineering.com
Universal Joint: [3] Princeton.edu
Bevel Gears: [4] science.howstuffworks.com
Slider Crank Linkage: [5] web.wpi.edu
Sun and Planet Gear: [6] www.lancereal.com
Scotch Yoke: [8] www.emerson.com
Chebyshev Lambda Linkage: [10] www.detailedpedia.com
[11] demonstrations.wolfram.com
Chain Drive: [12] www.engineeringchoice.com
Belt Drive: [13] fractory.com
Constant-Mesh Gearbox: [14] www.automobileinformer.com
Torque Limiter: [15] www.ustsubaki.com
Winch: [16] winchcentral.com
Rack and Pinion: [17] knowhow.napaonline.com
[18] www.theengineerspost.com
Camshaft: [19] auto.howstuffworks.com
[20] www.liveabout.com
Worm Gear: [21] khkgears.net