Reply by Whittler111

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Posted on Stanley 32-1/2 rule, how old is it?

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1 post in 2274 days

#1 posted 09-03-2014 11:14 PM

I am new to the group, but collect rules and old layout tools. I started because I whittle chains from basswood and needed a good way to lay it out.
The 32 1/2 is a real nice tool. There is a book called Boxwood and Ivory by Philip stanley that has a lot of info.
The Number on the brass slide and in the groove should match. according to the book since there were hand made, once they were fit together they did not want to separate them because they may not go back together.
” Slides and calipers were graduated separately from the rules to which they were fitted. At first this was done by scribing, in the same way that the wood was marked, but by about 1900 methods had been developed to
stamp the graduations into the metal with a rolling die, at a great saving in time.
Prior to separating the body and slide to graduate them, they were marked, so that each slide could be reunited later with the body it had originally been fitted to. This was done with a number stamped on the back of the slide and an identical number stamped on the inside of the groove. Each rule/slide in a lot would have a different number, thus making identification simple (it is interesting to observe that these numbers all seem to fall in the range 1 to 50; this may indicate that the usual lot size for graduation was 50, and
thus, by implication, that the graduating machines could only handle 50 rules at a time).
The Arch joint indicate after 1910-1912 because it is rounded allow a machine to cut it instead of using a chisel. I found the book in PDF somewhere, but it is real interesting to read.

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