Chris Walker wrote
...Mining The Summit and the Mining Engineers Handbooks come to mind with similar to your discovery.
And also DSP&P had a mention about him....
There's also a biography of his that goes into a lot of detail about him and his inventions. It's "
Arthur Redman Wilfley - Miner, Inventor, and Entrepreneur" by Jay E. Niebur and James E. Fell, Jr., published in 1982.
My first exposure to the name was from the Wilfley table I saw at the remains of an old mill in the San Juan mountains near Animas Forks, CO. That was before I knew about his connection to Kokomo.
The DSP&P Historical Society made two trips to Kokomo, and we hiked out the Wilfley Spur to his mill site.
I don't have my photos labeled very well, but I think these are the Wilfley Mill site in June 2009: