| US Patent: 157,562 
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| Improvement in Bit-Gages | 
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| Patentees: |  
 | John E. Windle (exact or similar names) - Springfield, MA |  | James C. Goodrich (exact or similar names) - Springfield, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Aug. 19, 1874 |  
| Granted: | Dec. 08, 1874 |  
 
USPTO (New site tip)| Patent Pictures:
	      
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                        Jeff Joslin (dm)
 
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| Description: |  | Depth stop which can be set at various angles and rings a bell when the determined depth has been reached. |  |