Gemstone Polishing Device and Method of Polishing

Abstract

A method of polishing diamonds held by a tang ( 100 ) having a predefined axis ( 160 ) orthogonal to polishing surface ( 110 ). The axis ( 160 ) returns to its original spatial orientation with respect to the polishing surface ( 110 ) at the end of each facet of the diamond ( 122 ) polishing.

1 . A tang ( 100 ) for polishing diamonds, said tang comprising:
 a) an elongated body ( 102 ) having a rear part ( 104 ) and a front part ( 108 ), characterized in that a rigid insert ( 130 ) having a length exceeding the thickness of the front part ( 108 ), is inserted in the front part ( 108 );   b) an assembly ( 142 ) of a pedestal ( 140 ) and dop holder ( 144 ) that mechanically interfaces with the insert ( 130 ), and;   c) wherein the assembly defines an axis ( 160 ) having a fixed spatial position with respect to said elongated body ( 102 ).   
   
   
       2 . The tang ( 100 ) of  claim 1 , wherein in use the tang ( 100 ) is leveled such that the axis ( 160 ) is placed in a position orthogonal to polishing surface ( 110 ) and the axis ( 160 ) returns to the orthogonal to polishing surface ( 110 ) position at the end of each facet polishing process. 
   
   
       3 . The tang ( 100 ) of  claim 1 , wherein the insert ( 130 ) has both of it, end surfaces ( 136  and  138 ) machined. 
   
   
       4 . The tang ( 100 ) of  claim 1 , wherein said dop holder ( 144 ) has a section ( 152 ) with a machined surface ( 156 ) leaning on the machined end face ( 136 ) of the insert ( 130 ), the section ( 152 ) is having an external diameter larger than the outer diameter of the insert ( 130 ). 
   
   
       5 . The tang ( 100 ) of  claim 1 , wherein the pedestal ( 140 ) has guiding means ( 146 ) serving as an axis for level ( 124 ) rotation and two O-rings ( 168  and  170 ) that prevent occasional rotation of the pedestal ( 140 ) in the insert ( 130 ). 
   
   
       6 . The tang ( 100 ) of  claim 1 , wherein and a spring ( 158 ) and a screw ( 154 ) tension the assembly ( 142 ) of pedestal ( 140 ) with dop holder ( 144 ). 
   
   
       7 . The tang ( 100 ) of  claim 1 , wherein the dop holder ( 144 ) has a section coupled with the pedestal ( 140 ) tubular stem ( 148 ) along a common axis ( 160 ). 
   
   
       8 . The tang ( 100 ) of  claim 1 , wherein for control of said tang ( 100 ) leveling a linear level ( 124 ) is removably mounted on the pedestal ( 140 ). 
   
   
       9 . The tang ( 100 ) of  claims 1  and  8 , wherein the level ( 124 ) rotates on said pedestal ( 140 ) at least 90 degrees. 
   
   
       10 . A method of polishing diamonds, comprising:
 a) providing a tang ( 100 ) of  claim 1 , a diamond ( 122 ) to be polished and a polishing surface ( 110 ), the method characterized in that it further comprises:   b) adjusting the diamond ( 122 ) polishing angle, polishing a facet of said diamond and leveling the tang ( 100 ) such that axis ( 160 ) becomes orthogonal to polishing disk surface ( 110 );   c) releasing and rotating the dop ( 128 ) on a predefined angle to polish at least one additional facet of the diamond ( 122 ), and   wherein the axis ( 160 ) returns the original orthogonal position to the polishing disk surface ( 110 ) upon completion of diamond ( 122 ) facet polishing.   
   
   
       11 . The method according to  claim 10 , wherein the leveling of the tang ( 100 ) in two mutually orthogonal axes is performed with the help of level ( 124 ). 
   
   
       12 . The method according to  claim 10  and  11 , wherein for reading the level ( 124 ) indications the level ( 124 ) is placed on the pedestal ( 140 ) and the pedestal ( 140 ) is rotated 180 degrees. 
   
   
       13 . The method according to  claim 10 , wherein the release and rotation of the dop ( 128 ) do not change the spatial position of the axis ( 160 ). 
   
   
       14 . A method for polishing diamonds, characterized in that diamonds ( 122 ) to be polished are held by a tang ( 100 ) having a predefined axis ( 160 ) orthogonal to polishing surface ( 110 ), the axis ( 160 ) returning to its original spatial orientation with respect to the polishing surface ( 110 ) at the end of each facet of the diamond ( 122 ) polishing. 
   
   
       15 . A device ( 100 ) for polishing diamonds, characterized in that it has a predefined axis ( 160 ) orthogonal to a polishing surface ( 110 ) and the axis ( 160 ) returns to its original spatial orientation at the end of each facet of the diamond ( 122 ) polishing.