Disc-record player comprising a pressure member for pressing a r

Details Disc-record player comprising a pressure member for pressing a r Disc-record player comprising a pressure member for pressing a r

1985-04-04

1987-03-10

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

G11B 2504

Patent

active

046495320

ABSTRACT:
A disc-record player comprises a pressure member for pressing a record disc (5) against a turntable (1) which carries a mandrel at the upper side, the mandrel being coaxial with the turntable and being engageable with the center hole of the record disc (5). The pressure member comprises spring means formed by turns (12a) of a toroidal coil compression spring (12) which is accommodated in a annular space (11) in the mandrel, which space is open at the circumference of the mandrel. The turns are clear of the mandrel at the side facing the turntable axis (1a). The spring turns (12a) are movable under spring force radially relative to the turntable axis (1a); they project from the circumference of the mandrel and press the disc against the turntable.

REFERENCES:
patent: 2833488 (1958-05-01), Kerber
patent: 3083927 (1963-04-01), Prosin
patent: 3817469 (1974-06-01), Moscatti et al.

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