US Patent: 2,479,973
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| Chuck
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Patentees:
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| James Y. Scott (exact or similar names) - Longmeadow, MA |
| Francis P. Healy (exact or similar names) - Springfield, MA |
| Edward A. Allen (exact or similar names) - Westfield, MA |
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Patent Dates:
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| Applied: |
Feb. 14, 1947 |
| Granted: |
Aug. 23, 1949 |
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Jeff Joslin
Vintage Machinery entry for Van Norman Machine Tool Co.
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Description: |
| This chuck is for holding valve stems while the valve's seating surface is reground |
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