US Patent: 82
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| Spiral bit with countersink for setting screws
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Patent Dates:
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| Granted: |
Nov. 17, 1836 |
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Patent Pictures:
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1 | 2
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Image courtesy and © John Harper |
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Jeff Joslin
Vintage Machinery entry for Page & Co.
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Description: |
| There is no patent drawing available. An example of this bit turned up in 2016 on eBay. It is marked "G. PAGE PATENT". Before this patent was issued the inventor had a business, Page & Co., that manufactured his patent mortising machine, but he had sold that business before he invented this countersinking drill bit. |
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