US Patent: 291,398
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| Lathe-bed
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Patentee:
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| Salmon W. Putnam (exact or similar names) - Fitchburg, Worcester County, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 21, 1883 |
| Granted: |
Jan. 01, 1884 |
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Joel Havens
"Vintage Machinery" entry for Putnam Machine Co.
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Description: |
| "My improvements relate to beds of lathes for turning purposes... It is well known by those skilled in the art that in all lathes the front of the carriage is much heavier than the rear side, and that also the 'weight of the cut,' when the machine is at work, falls mostly on the front side of the carriage, and the action of these unequalized weights combines to cause the carriage to wear, settle, and get out of true much more rapidly on the front way or track of the lathe than upon the rear one, and this excessive wear is hastened by the prevailing practice of making both the front and rear ways of a like angle, or similar. To overcome this difficulty, and to offset this uneven wear, is one of the essential objects of my present invention. To remedy this great defect in lathes and to retard and offset this uneven wear, I make the front way or track, B, wider and at a more obtuse angle than the rear one, B'..." |
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