Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Patent
1995-05-30
1997-07-08
Levy, Stuart S.
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
369270, G11B 700
Patent
active
056469349
ABSTRACT:
In a clamp mechanism, an adapter, and an optical disc apparatus for compatibly playing back an MD and a CD having different centering hole diameters and reference heights, a first clamp mechanism has a taper cone section for both the MD and CD, while a second clamp mechanism has an MD turntable and a CD clamper which is driven in contact with the MD turntable while clamping the CD. The adapter is a disc which has a hole having the same inner diameter as that of the centering hole of the MD and a thickness of 0.8 mm, the adapter to be attached to the CD. A first optical disc apparatus has an MD spindle motor and a CD spindle motor, and an optical system including an objective lens is arranged on a Straight line that connects both the spindle motors. A second optical disc apparatus has a spindle motor having an MD turntable and a CD turntable at both its ends.
REFERENCES:
patent: 4541086 (1985-09-01), Tanaka
patent: 4786997 (1988-11-01), Funabashi et al.
patent: 4910624 (1990-03-01), Peeters
patent: 4958839 (1990-09-01), Guzik et al.
patent: 5323379 (1994-06-01), Kim
Aikoh Hideki
Mizuno Osamu
Mohri Masanari
Nakamura Tohru
Tomita Hironori
Korzuch William R.
Levy Stuart S.
Matsushita Electric - Industrial Co., Ltd.
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