HELP!! Cone clutch!

[John-eh]

Alright I'm in a marine mechanics class and we need to do a project on dog clutches and cone clutches and how they work, I have a firm amount of knowledge on how the dog clutch works (since I've taken one apart) but I can't seem to find anything about the cone clutch anywhere on how it works, I know the basics of how it works, I would just appreciate any websites you may have found on it, or if you have any detailed information about the one clutch, thanks