US Patent: 70,479
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Grinding Metal
Improvement in Metal Planers
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Patentee:
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| James Hervey Sternbergh (exact or similar names) - Reading, Berks County, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Nov. 05, 1867 |
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Joel Havens
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Description: |
| The machine is intended for planing or grinding off metal surfaces with rapidity and with great accuracy, and more particularly for planing off smoothly and perfectly true any hardened surfaces which cannot be cut with a steel tool on the ordinary planer now in common use such, for instance, as chilled iron, hardened steel, anvil-faces, plane-irons, saw blades, glass or stone surfaces, or other hard substances. |
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