US Patent: 27,046
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Recutting File Blanks
Improvement in Methods of sharpening Files, etc.
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Patentee:
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| William B. Gillett (exact or similar names) - Auburn, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Feb. 07, 1860 |
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Joel Havens
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Description: |
| 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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