Several designs of belt drives.
Own work, from

Chevalier, A., Guide du dessinateur industriel, Hachette (Paris), 2004, ISBN 978-2-01-168831-6, p. 310
Fanchon, J.-L., Guide des sciences et technologies industrielles, Nathan/AFNOR (PARIS), ISBN 2-09-161590-5 Invalid ISBN/978-2-12-494183-4, p. 374
Christophe Dang Ngoc Chan (Cdang (talk))