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US Patent: 27,046
Recutting File Blanks
Improvement in Methods of sharpening Files, etc.
William B. Gillett - Auburn, NY

USPTO Classifications:
205/664, 76/24.5

Tool Categories:
industrial tools : files
metalworking tools : files


Not known to have been produced

F. G. Day
J. T. Lanehart

Patent Dates:
Granted: Feb. 07, 1860

Patent Pictures:
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The nature of my invention consists in decomposing a solution of acid or of a salt by passing a current of electricity or galvanism through the said solution in such a manner that the oxygen or .other corrosive element, upon being liberatedj shall attack and dissolve the substance of a file immersed in the said solution, thereby sharpening the teeth of the said file, the operation being termiuated when the file has become fit for use

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