Salford Screw Bolt Works
From Graces Guide
of Queen Street, Salford.
1854 Patent sealed: 'Joseph Porter, of the Salford Screw Bolt Works, Salford, engineer and tool maker, for improvements in machines for drilling or boring metals or other substances ; dated October 7, 1853.'[1]
1855 Patent sealed: 'Joseph Porter, of the Salford Screw Bolt Works, near Manchester, engineer and tool maker, for improvements in machinery for cutting, punching, forging, and framing nuts, bolts, screws, and various other articles of metals ; dated Sept. 19, 1854.'[2]
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