[PT032ABM1], Technical Note, Thomas Alva Edison, October 1st, 1888


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[PT032ABM1], Technical Note, Thomas Alva Edison, October 1st, 1888

Editor's Notes

Draft patent app. "Improvements in Iron concentrating. The object of this invention is to seperate non magnetic iron ores from their gangue so the concentrate will be sufficiently rich in iron for furnace use. ## The invention consists in first pulverizing the nonmagnetic Hemitite or specula iron ores to ten mesh or thereabout, bringing the same to a red heat. On cooling the partticles will be magnetic and are then run through the magnetic seperating machine described in patent ______ and in applications now pending. The trajectory of the falling magnetic particles being altered fall one side of a dividing board while the non magnetic particles fall on the other side. ### Claim process 1st crushing 2nd heating to make it magnetic 3rd seperating by our seperator or any other magnetic seperator. Edison" Dyer & S P.S. All ore milling patents are to be taken out in Canada for long period-- This also Edison [Recd Oct 2, 88 H. W. Seely]



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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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