US Patent: 93,863
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| Improvement in Casting Steel Ingots
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Patentees:
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| Henry Disston (exact or similar names) - Philadelphia, PA |
| Jonathan Marsden (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Aug. 17, 1869 |
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Patent Pictures:
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Russ Allen.
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Description: |
| Wedges are used to overcome shrinkage cracking and voids in cast, cooling metal being placed between the mold and ingot. |
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