US Patent: 773,640
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| Turning-Tool
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Patentee:
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| James Hartness (exact or similar names) - Springfield, Windsor County, VT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 18, 1904 |
| Granted: |
Nov. 01, 1904 |
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Joel Havens
"Vintage Machinery" entry for Jones, Lamson & Co.
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Description: |
| This application has relation to tool-holders of the character of that illustrated and described in Letters Patent No. 672,399, granted to me 16 April, 1901.
Claim:
In turning bar-stock it is frequently desirable to reduce the work to two different diameters at different points along its length, and in that event it becomes necessary to either employ two tools upon the turret or else to stop the operation of the lathe long enough to secure a careful adjustment of the tool after one diameter of the work has been turned. According to the present invention, however, the toolholder is so formed that after one portion of the work has been turned to the desired diameter both the tool and the backrest may be quickly adjusted to predetermined points without the necessity of adjusting set-screws, but by simply bringing into play other abutments which have been previously adjusted for the desired positions of the tool and backrest. |
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