US Patent: 125,759
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Improvement in Center-Bits
Center-Bit Style Countersink
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Patentee:
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| William H. Richards (exact or similar names) - Deerfield Corners, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 16, 1872 |
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Patent Pictures:
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1 | 2
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Jeff Joslin (dm)
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Description: |
| Semi-conical cutting lip formed on center-point, allowing bit to counter-sink and bore hole for plugs, in preparation for installing flat-head screws. |
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