US Patent: 862,437
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| Lathe
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Patentee:
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| Henry Bertram (exact or similar names) - Dundas, ON Canada |
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Patent Dates:
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| Applied: |
Mar. 11, 1907 |
| Granted: |
Aug. 06, 1907 |
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Joel Havens
"Vintage Machinery" entry for John Betram & Sons
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Description: |
| James W. See - patent attorney
Under modern conditions of lathe use, in which remarkably heavy cuts are taken with the recently developed high-speed steels, there has developed a tendency for the lathe arbor to spring into a deflection between its bearings. With extra heavy work being done at the face plate, either boring: or turning, the tendency is for the nose of the arbor to spring upwardly and deflect the central portions of the arbor, between its bearings, downwardly. My present invention aims to so stiffen the arbor as to lessen the evil referred to.
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