RICHARD J RENSKY
Broker in Burlington, MA

4326283, Apr 20, 1982

Sep 2, 1980

6/183180

Roy D. Toulan - Beverly Farms MA
Richard Rensky - Burlington MA

Quality Audio Components, Inc. - Woburn MA

G11B 306, G01B 524

369 55

A stereo stylus playback cartridge alignment system is disclosed in which the cartridge is aligned in accordance with and based upon the Baerwald formulae at an optimum position and angle so that the playback stylus more closely approximates the position of the cutting stylus utilized in making the recording while minimizing tracking distortion across the radius of a given record size. The system includes the utilization of an alignment disc which has a hole in its center and which is adapted to be placed over the record turntable's spindle. The disc is provided with a precisely positioned sight line, in one embodiment, in the form of a raised ridge, which is aimed at the pivot point for the tone arm and is further provided with an indented point which locates the proper position of the stylus tip. A grid surrounding the point enables the twisting of the cartridge to proper alignment when the sides of the cartridge are in alignment with the lines on the grid.