US Patent: 2,389,679
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| Drill Sharpening Device
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Patentee:
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| Julius Michelson (exact or similar names) - West Hartford, CT |
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Patent Dates:
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| Applied: |
Feb. 14, 1944 |
| Granted: |
Nov. 27, 1945 |
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Russ Allen.
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Description: |
| Jig to allow the sharpening of small drill bits with a stone by following the guide surface that the point prodrudes through and then indexing the drill 180 degrees. Known example provides collets for drill sizes 41 thru 60 and is marked TRUE POINT along with an unidentified company logo and the patent number. |
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