US Patent: 2,579,611
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| Knurling Tool
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Patentee:
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| John E. Poorman (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 03, 1949 |
| Granted: |
Dec. 25, 1951 |
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Joel Havens
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Description: |
| Claim:
According to my invention and after practical demonstration in connection with thousands of pieces of work knurled, I finally solved the problem of holding the knurling rollers in fixed adjusted position with limited friction distribution throughout the associated parts, and yet have succeeded in providing the details so simple that set adjustments can be made in a short space of time. |
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