Rick,
I looked up Whitworth, the three plate technique, according to the Wiki article:-
"Whitworth popularized a method of producing accurate flat surfaces (see Surface plate) during the 1830s, using engineer's blue and scraping
techniques on three trial surfaces. Up until his introduction of the
scraping technique, the same three plate method was employed using
polishing techniques, giving less accurate results."
http://en.wikipedia.org/wiki/Joseph_Whitworth
It's true that he is said to have popularised rather than invented the technique, using scraping rather than polishing.
I felt that it was interesting to mention Witworth and this process as we still use the same techniques in the home-shop environment. Looking at the machines that were produced using very limited tooling and simple methods in the nineteenth century is inspireing!
A happy new year ! Regards, Matthew
Matthew TINKER
CNC conversion 1944 Colchester Lathe build-up log
http://www.cnczone.com/forums/showthread.php?t=35519
--- On Fri, 31/12/10, Rick Sparber <rgsparber@aol.com> wrote:
From: Rick Sparber <rgsparber@aol.com>
Subject: RE: [gingery_machines] new article: Making it Dead Flat and Square
To: gingery_machines@yahoogroups.com
Date: Friday, 31 December, 2010, 18:55
Matthew,
I just read a bit about Whitworth and he certainly did a lot of impressive things. I could not find any reference to him inventing this procedure and would have thought it dated back to maybe the Greeks. Do you have a reference I can use in the article?
I was thinking about mentioned the 3 plate method but decided that was too much for one article. VERY cool stuff!
Have a Happy New Year!
Rick
[Non-text portions of this message have been removed]
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
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