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J Parkinson & Son (Shipley) Ltd of Canal Iron Works, Shipley, Yorkshire.
Some machines were sold under the Parkson brand name, others as Parkinson's Perfect Vise and Samsonia
1865 Joseph Parkinson set up in business in Bradford
1867 Company established.
1892 Joseph's son became a partner; the company became J. Parkinson and Son.
1893 Moved to Shipley
1894 presumably of 18 Chester st, Bradford
Acquired the Prince of Wales Foundry - renamed it the Canal Ironworks
c.1896 Moved to Canal Iron Works, Shipley (see advert)
1905 Advert. Gear cutting, boring and milling machines. 
1909 Machinery. Exhibit at Bradford Industrial Museum.
1911 Makers of Universal Milling machines. 
1912 October. Technical article on 'Testing Spur and Bevel Gearing' in Internal Combustion Engineering
1913 Advert for Vises (Parkinson's spelling) and Vise stands. 
1917 Advert for machine tools. 
1920 September. Exhibited at the Machine Tool and Engineering Exhibition at Olympia with machine tools including universal milling machines and four gear planers. 
1954 The company was acquired by Crofts (Engineers) Holdings Ltd.
Catalogues, 1899-1908 (3 volumes); centenary booklet and article, 1967.