Francis Holt
of Manchester
1853 Francis Holt and Hiram Barker patented the first ball-grinding machine used to produce hardened balls for locomotive clack valves
1853 Patent No. 1502 to Hiram Barker of Manchester, Engineer and Tool Maker, and Francis Holt of Manchester, Engineer, for improvements in machinery and apparatus for grinding and turning metals [1]. A description of the equipment is available online, in German[2]
1853 Hiram Barker listed as a machine maker (T. Fitton and Co), Foster Street, Crowther Street, Salford [3]
1856 Patent No. 1502 of 1853, to Hiram Barker of Manchester, Engineer and Tool Maker, and Francis Holt of Manchester, Engineer, for improvements in machinery and apparatus for grinding and turning metals, became void [4]
1863 Francis Holt, Engineer, Gorton Foundry, Manchester.[5]
See Also
Sources of Information
- ↑ [1] The London Gazette, July 29, 1856
- ↑ [2]Verbesserungen an den Maschinen zum Schleifen und Drehen der Metalle, welche sich Hiram Barker und Francis Holt, Ingenieure zu Manchester, am 20. Juni 1853 patentiren ließen: extracted from 'London Journal of Arts, August 1854. In the text, click on the highlighted 'Fig. 20', for example, to see illustrations
- ↑ Directory of Manchester & Salford, 1853
- ↑ [3] The London Gazette, July 29, 1856
- ↑ 1863 Institution of Mechanical Engineers