US Patent: 2,253,491
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Threading tool
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Patentee:
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Harding F. Bakewell (exact or similar names) - San Marino, CA |
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Patent Dates:
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Applied: |
Feb. 07, 1940 |
Granted: |
Aug. 26, 1941 |
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Joel Havens "Vintage Machinery" entry for Bakewell Manufacturing Co.
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Description: |
"This invention is a threading tool, either a tap having an exterior cutting-thread for internal threading the work or a die having an interior cutting-thread for externally threading the work." |
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