Turntable platter for record players

Details Turntable platter for record players Turntable platter for record players

1982-08-13

1985-08-13

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369271, G11B 360

Patent

active

045354383

ABSTRACT:
A turntable platter for record players, consisting of two layers one of glass and one of plastic, lying one on top of the other. The plastic layer can be of a thermoplastic and/or thermosetting material such as polycarbonate, polyacrylic, polystyrene or the like. The glass guarantees flatness, rigidity and pleasant appearance of the platter, such features not always being obtainable from the already known metal platters, while the plastic, guarantees light weight associated with such material. The glass-plastic combination in the turntable platter represents considerable progress in the particular industrial field as it guarantees the absorption of spurious vibrations, and secondly, optimum sound reproduction quality. The glass and plastic layers can be joined together by means of adhesive or pushed together and can also be of different sizes and shapes. The turntable platter can be provided with an upper layer, preferably less than one micron thick, of conductive material.

REFERENCES:
patent: 1334690 (1920-03-01), Davis
patent: 1436790 (1922-11-01), Bowman
patent: 3767865 (1973-10-01), Schuller et al.

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