From Graces Guide
Manufacturers of board and paper making machinery, of Sheffield.
1933 Private company formed by an American, William Hulse Millspaugh, to construct paper-making equipment and heavy centrifugal castings in both steel and bronze. He leased buildings at Hadfields' East Hecla Works, where he equipped a machine and erecting shop for the manufacture of suction rolls and other paper-making machinery specialities. He also equipped a foundry on the site for the manufacture of heavy centrifugal castings, in both bronze and steel. Hadfields sold him the liquid steel as required; the non-ferrous metals, such as phosphor bronze, bronze, manganese bronze, gun metal, etc., were melted in his own furnaces.
1946 The company was sold to Hadfields.
1951 Company made public as a result of nationalization of Hadfields.
1955 Hadfields bid to acquire the company again followed by bids from Walmsleys and from a director; Hadfields was eventually successful and would work with Walmsleys (for whom Millspaugh was an important supplier) on areas of common interest.
1961 Manufacturers of board and paper making machinery. Preparation plant, centrifugal castings and welded fabrication. 2,000 employees. 
Sources of Information
- The Times, Dec 15, 1955
- The Times, Jan 10, 1956
- The Times, Jan 12, 1956
- 1961 Dun and Bradstreet KBE