US Patent: 78,769
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Improvement in the Manufacture of Augers and Bits
Machine for Upsetting Cook's Bits
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| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jun. 09, 1868 |
| Reissue Information: |
| Reissued as RE4,516 (Aug. 15, 1871) |
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Patent Pictures:
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Jeff Joslin (dm)
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Description: |
| This machine is designed, specifically, to upset the gouge shape cutting lips of Cook's patent bits. A spring loaded shaft in conjunction with a cam on the drive shaft, engages and disengages the die with the bit. A pin on the bevel gear rotates the shaft and die a quarter-turn to twist the lips, then automatically disengages. Auger bits, made by the James Swan Co., were marked with this patent date.
Assigned to Richard P. Bruff in second re-issue, October 21, 1873. |
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