Re: Fifty Gold Mines Mill Car Loader, and Bumping Tables

Posted by drgwcs on
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Roof-Hatches-Mill-Car-Loader-and-Bumping-Tables-tp19659p19654.html

Chris Walker wrote

I can relate to your angst Jim.
DPL L592


It appeared (to me) that the feed chute was propped up to clear when not in use. The rubber conveyor belt system was developed in the early 1890's and was quickly adopted in the iron mining industry; whether that early date was uptaken in Black Hawk I can't say.
DPL X-2051


Mills varied in equipment and process's with new technologies and methods developed all the time.
You mentioned the Wilfly's, there was another more common shaker table used and manufactured right there in the Central City and Black Hawk foundries of McFarland & Co.; the Gilpin Bumping Tables. Does your Prospectus call that out specifically? The USGS only listed "Concentrating Tables" in 1917

Denver Public Library images K-178, X-60606  I'm sure there are others

The 911MetalurgistBlog has numerous Mill machinery images, that may help.
https://www.911metallurgist.com/blog/small-ore-feeders
"Supplying the Mining World"was another book that dealt mainly with the California market.

As for the top of the Orefeeders, I've seen a few variations : see DPL X-63123 for one example.

Maybe Keith Pashina will see this and add something.

Anymore "Wilfley tables" is almost used as a generic term and I used it as such. They are listed as shaker tables or concentrator tables interchangeably on mill information.  The prospectus does not mention a manufacturer for the tables or feeders. I have not really found a match to them otherwise despite looking through the 911 metallurgist, the stampmill man or a couple of catalogs on archive. That was another reason to scratchbuild. (just glad these things don't need to operate) I do have a full copy of the prospectus over on the C&S Facebook group in the album section. It was provided courtesy of Mark Greaves in the Colorado Mines and Mining group. It is entitled "Gathering Gold" and I suspect it was intended originally for investors that came in 1906.

Here are the shaker tables- I am currently working on them and have the frame assembled and the table top made. Do these seem to be any sort of a match to the Gilpin Bumping Tables? I have not seen a pic of them as far as I know.

The feeders do resemble slightly a Heandy but do not match anything exactly

Mine were built using the smallest I beam I could find and are slightly more beefy. I left the bottom straight- after several inconsistent attempts to bend a curve. The rails in the bottom I found too light to duplicate exactly  I had a hard time trying to make the bin with its curved spout till I came up with the disposable razors. This makes the bin somewhat thick but does not show in the completed structure.

Jim