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Afraid I'll always be using "spiral", sorry for the technical mathematicians who find it offensive. of heard "helix" used for any matter, only a few times.
avid Wilkinson's shop, at the top of the page, 2 items in particular caused me to ponder.
The 1st is 2 Wilkinson class lathes manufactured in 1833 (picture taken about 1900 with the lathes still working ! Would 99Panhard in #94, Lester Bowman in #93, jpevner in #95 (and others?
) have grabbed on to the problem of chronologically dating machines into a schema without benefit of good documentation for OEM.
If the 2 machines look over-all equally old, but the more "primitive" has poor quality even into it's smaller details, then; it's the youngest, and just a primitive copy of the other. In the case of similar machines, but descended through different manufacturers, the situation quickly becomes vastly more complicated. With the occasional reasonably accurate documented OEM date interspersed here and there, the situation should be manageable. The images below are not exactly what I had in mind, I was pretty sure I had several closer to the early 1800s, and covering Rohde Island. Best, George Those are from English & American Tool Builders by Joseph Wickham Roe... Roe was close enough to the time to have known some of the majhor players or, at last, people who had known them. The lathe below was built in NY in 1830 ad there was an article in American Machinist about it. While used the lathe until 1852 when it was sold to Bliss & Brown of Carthage NY.
He went to work for the Pitcher & Gay shop in 1819.The water-wheel is obvious, but the 2nd, the wooden planer at the top right corner intrigued me.Thanks to , cnc Fireman and others, for help in taking us back to the 1830s for iron planers, with Gay&Silvers granite silled planer, and cnc in P 92 reporting on the 1st known Iron Planer built in the USA, by Edward Bancroft in 1830.recall also famous ships that ended their lives as oil storage tanks, etc.or the ships that reliable sources show changing in dramatic ways over a few decades of refits.
I have two of these early wood bed engine lathes and I will likely never know exactly who built them.