| US Patent: 1,535,452 
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| Grinding Machine | 
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| Patentee: |  |
 | Prentice Conradson (exact or similar names) - Evansville, Rock County, WI |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Feb. 15, 1923 |  
| Granted: | Apr. 28, 1925 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
 
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| Description: |  | Claim: 
The general object of the invention is to provide a spindle-carriage having novel and improved means for driving the spindle, for starting and stopping rotation of the spindle, and for adjusting the spindle to different positions about a vertical axis to permit of grinding taper work. |  |