| US Patent: RE12,379 
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| Ratchet Screw Key | 
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| Patentee: |  |
 | Camille Contal (exact or similar names) - Paris,  France |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Apr. 15, 1905 |  
| Granted: | Aug. 15, 1905 |  
 
| Reissue Information: |  | Reissue of 751,055 (Feb. 02, 1904) |  
 
USPTO (New site tip)| Patent Pictures:
	      
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			1 | 2
	        ] |  |  |  | Camille Contal Pat. August 15, 1905 |  Google Patents
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                        Stan Schulz
 FRANK MOSSBERG Co. Catalog No. 12 (archive.org)
 
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| Description: |  | The patent mentions the sockets, universal joint, and rod handle shown in the drawings. The key item in the patent is the unique spring-loaded "slip-clutch" ratchet section. 
The Frank Mossberg Co. took over U.S. production in 1909, and made the Auto-Cle the center of an extensive line of socket sets. A 1910 Frank Mossberg Co. catalog digitized in archive.org provides details of these sets. 
Contals' Nov. 7, 1916 "Extensible Tool" patent (no. 1,203,853) is based on the AUTO-CLE. |  |