US Patent: 5,989X
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Screw cog for ships' blocks (Sheave cog)
Screw cog for shives of ship blocks
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Patentee:
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| Rhodes Kingsbury (exact or similar names) - Bath, ME |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
May 22, 1830 |
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Joel Havens
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Description: |
| Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. Only the patent drawing is available. This patent is in the database for reference only. |
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