US Patent: 155,862
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| Improvement in screw-presses
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Patentee:
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| Cyrus W. Crenshaw (exact or similar names) - Athens, AL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 25, 1874 |
| Granted: |
Oct. 13, 1874 |
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Jeff Joslin
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Description: |
| This patent is the earliest known patent for a recirculating-ball screw mechanism. The patent covers its use as a screw press, perhaps as a cotton press. For more on the development of the recirculating-ball mechanism see patent 477,642. |
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