View single post by Salada
 Posted: Sat Jan 25th, 2014 10:35 pm
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Joined: Mon Nov 4th, 2013
Posts: 1190
Thanks Ray; interesting book & diagrams - some of the maths looks a bit beyond my level !
The 'Safety Hook' is an exact copy of a patented English type, the Ormerod. Perhaps they didn't patent it in the US (unlikely ?).
I had wondered, but was too polite to say so, why you are modelling a '4 Post' headframe. I know they do exist but always struck me as a strange design considering the uni-directional winding/braking forces involved.

Regards            Michael

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