J. D. Duffy & Son of Detroit, MI, developed the Univertical swivel-head milling machine and began manufacturing it in 1940. The rights were soon sold to Charles T. Walker, who founded Univertical Machine Co. to manufacture the line of milling machines beginning in 1942. Univertical also made a line of non-ferrous hammers.
Information Sources
- Univertical LLC no longer makes machine tools.
- Several Google Books snippet views from 1940 describe J. D. Duffy & Son introducing the Univertical at that time.
- Machine information can be found at Tony Griffith's Lathe web site.