Joseph Slater (1812-1890) was the son of Joseph (a joiners’ tool maker) and his wife, Hannah.  Joseph Jun. was involved with Roberts & Slater (see William Briggs), a silver and plated goods manufacturer, which had registered a silver mark from Furnival Street in 1845.  In 1851, the workforce was 103 hands. In 1858, Joseph withdrew.  In 1859, Slater Son & Horton registered a silver mark in Norfolk Street. Joseph Slater & Son was its successor, which registered another silver mark at 117 Norfolk Street in 1867.  The son was Joseph Henry Slater (c.1838-1909).  In the 1861 Census, Joseph Slater, aged 48, Broomhill Terrace, described himself as an electro-plater, employing a dozen men and three boys. He manufactured electro-plated spoons, forks, desserts, and fish knives.  In 1871, Joseph Henry Slater was apparently manager. He told the Census (1871) that he employed seven men, six boys, and ten women.

Joseph Slater & Son was last listed in 1876, when it advertised from Sheffield Plate Works, Love Street.  Joseph H. Slater was ‘unemployed’ by 1881, and though he was later listed as an electro-plate manager he had retired by 1891. Joseph Slater, ‘gentleman’, The Mount, Broomhall, died on 30 May 1890, aged 78, and was buried in an unconsecrated grave in the General Cemetery. He left £3,055. Joseph Henry Slater, Sherwood Bank, was buried (aged 71) in Ecclesall on 1 June 1909.