Patent
1974-03-20
1976-10-19
Konick, Bernard
179 1GQ, 1791004A, 17910041K, G11B 344, H04R 500
Patent
active
039872564
ABSTRACT:
Reproducing cartridge apparatus for producing preferably at least three and most advantageously four channels of electrical signals from a multi-channel signal containing grooved record where the sides of the groove are oriented at angles of 45.degree. from the vertical, said reproducing apparatus comprising a stylus adapted to extend into the record groove, at least three and preferably four transducers mounted in spaced angular relationship to one another and responsive to movement of the stylus in various directions for producing electrical signals indicative of the directions of movement imparted to the said stylus as the stylus rides in the record groove. The transducers have main detecting axes spaced in different directions along which axes they are responsive to a maximum degree to movement of the stylus.
REFERENCES:
patent: 3118977 (1964-01-01), Olson
patent: 3463889 (1969-08-01), Ahrens
patent: 3686471 (1972-08-01), Takahashi
patent: 3687461 (1972-08-01), Kamiya
patent: 3691316 (1972-09-01), Oda et al.
patent: 3710034 (1973-01-01), Murry
patent: 3777076 (1973-12-01), Takahashi
patent: 3786193 (1974-01-01), Tsurushima
"On the Discrete 4 Channel Disc CD4," HiFi Equipment, 1972, pp. 14-25.
Konick Bernard
Lucas Jay P.
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