[SEL] NC or NF thread

[Curt]

Ron,
What a neat mechanical device! I'd never seen this. Your depth of 
knowledge never ceases to amaze me.
Thanks for sharing.
Curt

MaytagTwin at aol.com wrote:

> 
>Hi Curt,
>That sounds like a machinist's version of a Chinese windlass, also called  
>the differential windlass which is a simple but powerful means of increasing  
>leverage.  
>_Click  here: Dictionary - Yahooligans! Reference -_ 
>(http://yahooligans.yahoo.com/reference/dictionary/entries/64/d0216400.html)  
>
> 
>Regards,
>Ron Carroll
>  
>