| US Patent: 556,646 
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| Device for detecting short circuits | 
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| Patentees: |  
 | Charles E. Skinner (exact or similar names) - Allegheny, PA |  | Charles F. Scott (exact or similar names) - Pittsburgh, PA |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Dec. 31, 1892 |  
| Granted: | Mar. 17, 1896 |  USPTO (New site tip)
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                        Jeff Joslin
 Vintage Machinery entry for Westinghouse Electric & Mfg. Co.
 
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| Description: |  | This patent seems to be the genesis of the "growler", a device used to test motor windings and other electrical coils for shorted windings. |  |