US Patent: 79,767
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Ornamenting Metals
Improvement in Screw Cutting Lathes
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Patentee:
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| J. P. Theodore Lang (exact or similar names) - Washington, DC |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jul. 07, 1868 |
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Joel Havens
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Description: |
| The nature of my invention consists in so constructing a lathe for chasing screws as to secure the machinery against unnecessary wear, as well as accident, and secure the operating machinist against any mistakes in chasing over the same thread, and at the same operation, saving a great deal of time. |
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