Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1980-09-02
1982-04-20
Shepperd, John W.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 56, 33180R, G11B 306, G01B 524
Patent
active
043262830
ABSTRACT:
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.
REFERENCES:
patent: 2815583 (1957-12-01), Stoodley
patent: 3183004 (1965-05-01), Miessner
patent: 3283411 (1966-11-01), Steward
patent: 3493234 (1970-02-01), Voss et al.
Rensky Richard
Toulan, Jr. Roy D.
Quality Audio Components, Inc.
Shepperd John W.
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