US Patent: 3,723,016
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| Spindle Depth Control
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Patentee:
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| Robert A. Lehmkuhl (exact or similar names) - Cincinnati, Hamilton County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 17, 1971 |
| Granted: |
Mar. 27, 1973 |
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Joel Havens
"Vintage Machinery" entry for Carlton Machine Tool Co.
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Description: |
| Abstract
A horizontal boring machine of the type having a traversing spindle and utilizing fluid motor means for driving the spindle with a tool to a cutting position then moving the tool into the workpiece to a preselected depth with electrical means actuated when said preset depth has been reached to cause a change in the flow of oil in the fluid motor to retract the spindle. |
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