[modeleng] Re: coarse threads

Very interesting, however, one thing is certain, I wont be trying to make 
one of them.

I am gradually restoring an old lathe I bought a couple of years ago, and 
although lack of time has limited the amount done so far, the other day I 
did clean one part, to find a brass plate detailing changewheels for thread 
cutting.
The threads listed are: 1,2,3,4,5,6,7,8,9,10.11,12,14,16,18,19,20.28 tpi.
Some are the usual ones I would have expected, but the others are unusual.
I was wondering / hoping that the threads might have given a clue to the 
purpose as it appears to have been built for a specific use, although thus 
far it has been impossible to identify the maker thus far.


Alan Stepney

http://www.alanstepney.info
Model Engineering & steam engine information pages
----- Original Message ----- 
From: "Edward Bean" ebme@xxxxxxxxxx
[modeleng] Re: coarse threads

The <http://www.vcalc.net/cu.htm>Curta<http://www.vcalc.net/cu.htm> 
mechanical calculators of the 1950s,

 Edward Bean 

MODEL ENGINEERING DISCUSSION LIST.

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