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Patents for William Alfred Pearn
Patents 1 - 15 of 20
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NumberDatePatenteeTitleType
504,742Sep. 12, 1893F. Pearn, W.A. PearnMachine for Boring Cylinders and Turning the Flanges Thereof
GB-189,408,120Mar. 09, 1895W.A. PearnImprovements in machines or tools for drilling, tapping, and like purposesradial drill presses
GB-189,625,037Oct. 16, 1897W.A. Pearn, F. Pearn, E.G. WrigleyImprovements in tools or machines for facing, turning, boring and otherwise cutting flanges on castings and for operating upon other articleshorizontal boring mills
GB-190,511,870Mar. 01, 1906W.A. Pearn, F. PearnImprovements in connection with machine tools for milling, facing, and cutting metalsmetal lathes
GB-190,714,922May 21, 1908W.A. Pearn, F. PearnImprovements in machines for milling, facing, and other metal cutting operationsmetal lathes
941,269Nov. 23, 1909W.A. Pearn, F. PearnMachine for milling, facing, and other metal-cutting operationsmetal lathes
GB-191,219,159Apr. 17, 1913W.A. Pearn, F. PearnImprovements in boring, facing, and like machinesmetal lathes
GB-191,402,895Oct. 01, 1914W.A. PearnImprovements in boring, facing, milling and like machine toolshorizontal boring mills
GB-191,413,815Jan. 28, 1915W.A. PearnImprovements relating to boring, facing and like machineshorizontal boring mills
GB-191,413,816Mar. 25, 1915W.A. PearnImprovements in boring, facing and like machineshorizontal boring mills
GB-140,562Apr. 01, 1920W.A. PearnImprovements in machine tools for drilling or cutting out templetshorizontal boring mills
GB-160,602Mar. 21, 1921W.A. PearnImprovements relating to boring barshorizontal boring mills
GB-178,569Apr. 20, 1922W.A. PearnImprovements in drilling machinesdrill presses
GB-185,004Aug. 31, 1922W.A. PearnImproved method of locking indexed work tables of machine toolsmetalworking machines
GB-189,352Nov. 30, 1922W.A. PearnImprovements in jigs for facilitating drilling operationsdrilling and boring
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