| US Patent: 57,195 
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| Screw Clamp | 
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| Patentee: |  |
 | Hermann Schmidt (exact or similar names) - New York, NY |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | Aug. 14, 1866 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Hermann Schmidt Pat. Aug. 14, 1866 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | The threads in the clamp jaws are on spring loaded levers, so the threads can be swung away from the screws enabling quick adjustment. |  |