Need math information on the Graham

Posted: Fri Oct 14, 2011 3:34 pm     Post subject: Need math information on the Graham

Hi All:

Im adding escapements to my prgram GearoticMotion, and Im curious if anyone has any documents that describe the math in the graham. I think Ive got most of it, but there seems to be an arbitrary use of rotating the pallet angles to create lock and drop angles. This seems wrong to me and Im curious if anyone knows of any specification that may exist. A video showing what Im playing with is at http://www.youtube.com/watch?v=z81GjQGDZ2c

Thx
Art
www.gearotic.com

Posted: Sat Oct 15, 2011 12:59 am     Post subject:

have you tried Mark Headricks website, he has an e-book on how to draw escapements, and some great animations.

http://www.angelfire.com/ut/horology/escapement.html