Patent Publication Number: US-2012036984-A1

Title: Center fire pistol and rifle cartridge case polishing apparatus

Description:
A tool used to turn spent, Boxer type, center fire pistol and rifle cartridge casings using a tail stock a rod and a cone shaped piece to hold the casing while being turned and polished with a piece of steel wool. 
     CROSS-REFERENCE TO RELATED APPLICATIONS 
     
         
         
           
             U.S. Patent Documents 
           
         
       
    
     
       
         
           
               
               
               
               
             
               
                   
                   
               
             
            
               
                   
                 4,178,189 
                 December 1979 
                 Mancini/Galloway 
               
               
                   
                   
               
            
           
         
       
     
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH 
     Not applicable 
     BACKGROUND OF INVENTION 
     1. Field of Invention 
     The present invention is intended to be used in the art of reloading spent rifle and pistol center fire cartridge casings with boxer primer style flash holes and any other similar application. The principal intent of the invention is in the art of case preparation, specifically, cleaning, polishing to minimize scratches, remove excessive tarnishing or discoloration, allow for more careful examination of cartridges, and greatly improve general appearance prior to reloading same. 
     2. State of the Art 
     The current method for cleaning or polishing spent casings is through the use of a media tumbler that uses ground corn cobs or crushed nut shells that may contain a polishing agent. This method is time consuming, noisy, dirty, and in some cases leaves pieces of media in the flash hole and primer pockets that could be dangerous if not removed. Another method would be the use of a tool invented by Mancini and Galloway that requires the user to buy additional parts (shell holders) in order to accommodate various sizes of casings and that it is possible for the user to place a loaded cartridge in the tool which could be very dangerous and cause bodily harm. 
     BRIEF SUMMARY OF THE INVENTION 
     The present invention provides an apparatus that can be used to clean and polish the outside of spent pistol and rifle casings in conjunction with a rotary hand drill and a mild abrasive contacting the outer surface while turning same, faster, safer, and more economically. The invention solves the problem of having small pieces of media stuck in the primer pockets and flash holes. It also acts as a gauge to detect misaligned flash holes and prevents the possibility of placing a loaded casing in the device. 
    
    
     
       BRIEF DESCRIPTION OF DRAWING 
         FIG. 1  is a cross-sectional view of the Invention 
         FIG. 2  is a cross-sectional view of the Invention with a casing installed 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to the drawings:
         The preferred embodiment of the device of this invention is shown in  FIGS. 1  and  2  comprising the cone shaped retainer # 10  having a bore # 11  extending axially from one end to the other. A portion of the bore # 11  is internally threaded # 11   a.  The tapered sides of the cone # 10   a  are angled so as to restrain a casing.   A shaft # 12  is provided that at least a portion of which is threaded externally # 12   a  which will engage the partial internal threads of the bore # 11   a          

     The other end of the shaft # 12  is plain # 12   b  and will easily slide into the bore # 14  of the main body # 15 . A set screw # 16  will engage internal threads # 16   a  that are perpendicular to the axis bore # 14  of the main body # 15 . The rear portion of the body # 15  is machined # 17  equally on three sides to accept the jaws of a drill chuck. The front portion of the body # 15  has been machined # 18  to access the primer pocket of rifle and pistol casing using large primers. A cartridge case # 19  is shown engaged on the machined front portion # 18  end of the body # 15  with the shaft # 12  through the primer hole # 19   a  and the cone # 10   a  of the retainer # 10  engaging the mouth # 19   b  of the casing. 
     While there have been shown in the drawings and description what is at present considered the preferred design of the Invention, it will obvious to those skilled in the art that various changes or modifications can be made without departing from the original scope of the invention as defined in the specifications and claims.