An unusual valve gear:

Even older tom · An unusual valve gear:

Hawkworth valve gear? Never heard of it but it looks interesting.
The first 2 mins are rain drops, so just be patient!

http://www.youtube.com/watch?v=8x97LU6kRQA&feature=channel_page

poliss

John Wesley Hackworth, son of the great Timothy Hackworth. Patented a radial valve gear in 1859.

Quite a few types I've never heard of.
http://en.wikipedia.org/wiki/Valve_gear