I am researching a drill chuck made by Pratt & Weir of Hartford, Ct. and The Doebler Mfg. Co. Middletown, CT. Does anyone have one of these chucks?
Pictures might help.
pat 549,837 issued November 12,1885, check DATAMP.org
Let me know if you can view this.
Doebler
https://www.angelfire.com/wy/mttools/Doebler.htm
Pratt & Weir
http://vintagemachinery.org/mfgindex/detail.aspx?id=10533