Patent ID: 7630288

Claim:
A tone arm mounting and vertical guide system comprising: a. an adjuster screw ( 301 ) affixed to a tone arm pedestal ( 106 ) by an adjuster screw fastening means ( 305 ); an adjuster wheel ( 302 ) is adjustably received by adjuster wheel ( 302 ) receiving and adjusting means at the adjuster screw ( 301 ); the adjuster screw ( 301 ) is received into a thrust bushing ( 307 ) at an arm board ( 206 ); the thrust bushing ( 307 ) having a thrust bushing top face ( 308 ); the adjuster wheel ( 302 ) rotatably bearing against the thrust bushing top face ( 308 ), the thrust bushing ( 307 ) mounted in an arm board ( 206 ) with the bore of thrust bushing ( 307 ) perpendicular to the top plane of arm board ( 206 ); rotation of the adjuster wheel ( 302 ) adjusts the VTA ( 110 ); b. a vertical guide system ( 370 ) in which a set of pedestal features ( 115 ) of tone arm pedestal ( 106 ), or any attachment thereto, are keyed to, and slidably received in the vertical direction, by a matching set of arm board features ( 208 ) of arm board ( 206 ), or any attachment thereto; said set of pedestal features ( 115 ), or set of arm board features ( 208 ), or both, of cylindrical topology (generated by vertical line elements).