Dynamic information storage or retrieval – Specific detail of information handling portion of system – Electrical modification or sensing of storage medium
Patent
1981-11-17
1985-05-28
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Electrical modification or sensing of storage medium
369292, 369219, 369249, G11B 900, G11B 310, G11B 2124
Patent
active
045204730
ABSTRACT:
A signal pickup device in a rotary recording medium reproducing apparatus comprises a turntable placed thereon with a rotary recording medium recorded with an information signal as variations in geometrical configuration, for rotating the rotary recording medium, a reproducing stylus provided at a tip end of a cantilever, for making contact with and sliding against a recorded region of the rotary recording medium upon reproduction to reproduce the information signal, a resonator having a resonance frequency which varies in accordance with the above variations in geometrical configuration, and a conductive ribbon having one end connected to the reproducing stylus and the other end connected to the resonator to electrically connect an electrode of the reproducing stylus with the resonator, where the conductive ribbon is in a curved and bent state upon reproduction of the rotary recording medium. The conductive ribbon has a length such that the conductive ribbon is put into an extended state from the above curved and bent state when the reproducing stylus is lowered below the height position of the rotary recording medium, to restrict the lowering of the reproducing stylus at a height position higher than that of the turntable.
REFERENCES:
patent: 4170783 (1979-10-01), Tajima
patent: 4382293 (1983-05-01), Tajima et al.
patent: 4423504 (1983-12-01), Saito et al.
Abe Ryozo
Sakurai Masaki
Sugiyama Hiroyuki
Yoshihara Kenji
Yusa Yasuhiro
Psitos Aristotelis M.
Victor Company of Japan Ltd.
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