Patent ID: 6118057
Filing Date: 2000-09-12
Classification: G10D

Abstract:
An electric guitar string tension adjustment structure comprising:a bottom block, said bottom block comprising a plurality of screw holes, a row of stepped string mounting holes through top and bottom sides thereof for holding a string each, and a threaded tremolo arm mounting hole;a bridge body supported on said bottom block, said bridge body comprising a horizontal wall and a vertical wall connected at right angles, a row of round holes respectively vertically aligned with the stepped string mounting holes at said bottom block for guiding strings out of the stepped string mounting holes at said bottom block, a row of through holes arranged at the vertical side wall corresponding to said round holes, a plurality of transverse slots arranged in parallel between said round holes and said through holes, an extension plate longitudinally extended from one end of the horizontal side wall, a through hole at said extension plate, and a plurality of countersunk holes respectively fastened to the screw holes at said bottom block by respective screws;a tremolo arm mounted in the through hole at said extension plate of said bridge body and threaded into the threaded tremolo arm mounting hole at said bottom block;a plurality of saddle blocks respectively mounted on said bridge body and connected to said through holes at the vertical side wall of said bridge body, said saddle blocks each comprising a front end, rear end, a bottom side wall, an elongated slot adjust to the rear end which guides a string out of one transverse slot at said bridge body, a locating flange raised from the bottom side wall of the respective saddle block around said elongated slot and moved with the respective saddle block back and forth along the corresponding transverse slot at said bridge body, a non-circular vertical locating hole near the front end, a horizontal slot at the front end across said vertical locating hole, a horizontal screw hole at the rear end connected to one through hole at the vertical side wall of said bridge body, and a vertical insertion hole spaced between said elongated slot and said non-circular vertical locating hole in communication with said horizontal slot;a plurality of saddle block mounting screws respectively mounted in the saddle block mounting holes at the vertical side wall of said bridge body and treaded into the horizontal screw holes at the rear end of each of said saddle blocks;a plurality of springs respectively mounted around said through holes and stopped between the vertical side wall of said bridge body and the rear end of each of said saddle blocks;a plurality of tension screw studs respectively mounted in the vertical locating holes at said saddle blocks, said tension screw studs each comprising a round head, a string groove at said round head for guiding one string from the elongated slot of one of said saddle blocks, and a threaded, non-circular stem fitting the vertical locating hole at one of said saddle blocks;a plurality of adjustment nuts respectively mounted in the horizontal slot at each of said saddle blocks and threaded onto the threaded, non-circular stem of each of said tension screw studs, said adjustment nuts each having a toothed peripheral wall; anda screwdriver for turning said adjustment nut, said screwdriver comprising a toothed shank, which is meshed with the toothed peripheral wall of one adjustment nut when inserted into the insertion hole at one of said saddle blocks.