US Patent: 45,483
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Improvement in Tools for Boring Holes
Bit for Undercut Holes
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Patentee:
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| Augustus Eliaers (exact or similar names) - Boston, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Dec. 20, 1864 |
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Patent Pictures:
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Jeff Joslin (dm)
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Description: |
| By means of a pivoting cutter with two cams and a threaded sleeve and nut/handle arrangement, this bit is designed to be able to produce an undercut hole. I. e. the hole is larger at the bottom than the top - ..."especially desirable for the insertion of rubber or other elastic studs or buttons, which are firmly held therein." |
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