US Patent: 1,244,084
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| Tapping Machine
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Patentee:
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| Arthur A. Shafer (exact or similar names) - Erie, Erie County, PA |
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Patent Dates:
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| Applied: |
Oct. 19, 1916 |
| Granted: |
Oct. 23, 1917 |
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Joel Havens
"Vintage Machinery" entry for Rickert-Shafer Co.
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Description: |
| Claim:
The combination in a machine of the class described, of a frame, a vertically movable sleeve mounted in the lower portion of said frame, a series of rack teeth on said sleeve, a sleeve slidably and rotatably mounted in the upper portion of said frame, a tool spindle passing through said sleeves, means to cause said spindle to rotate with said upper sleeve while permitting longitudinal movement of the spindle in the sleeve, collars secured on said spindle above and below said lower sleeve to prevent said sleeve sliding on said spindle, a friction disk around said upper sleeve, a sleeve non-slidably journaled on said upper sleeve, arms on said sleeve, a shaft journaled in said arms, a spur gear on said shaft intermeshing with the rack teeth on said lower sleeve and means to cause said shaft and spur gear to rotate. |
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