US Patent: 2,542,421
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| Machine Tool
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Patentee:
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| Alexander J. McClelland (exact or similar names) - Cleveland, Cuyahoga County, OH |
| USPTO Classifications: |
| 29/64 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 11, 1945 |
| Granted: |
Feb. 20, 1951 |
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Joel Havens
"Vintage Machinery" entry for Warner & Swasey Co.
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Description: |
| Claim:
The machine tool disclosed herein and to which the inventive subject matter hereof is applied of the type disclosed in the applications of Robert Clark, filed 11 June, 1943 and filed 06 June, I946. The said Clark application issued 13 August, 1946, as Patent No. 2,405,686. The said Clark application issued 31 October, 1950, as Patent No. 2,528,299. In the said Clark applications the machine tool disclosed employs a reversible variable speed electric motor for driving the spindle, while the slide is provided with an indexable turret. Also in the machines disclosed in said applications means are provided for controlling the speeds, the direction of rotation and the starting and stopping of the motor for each step of a work cycle and this means can be preset and then actuated in part by the indexing of the turret and in part by the movements of the slide. |
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