High density recording playback element construction

Details High density recording playback element construction High density recording playback element construction

1974-11-19

1976-03-23

Hecker, Stuart N.

Electrical generator or motor structure

Dynamoelectric

Rotary

17910041K, 310 82, H04R 1704

Patent

active

039461670

ABSTRACT:
In a pickup for the playback of a high density signal recording stored at the surface of a record carrier, which pickup includes a scanning element and a mechanical-electrical pressure transducer connected to the scanning element by a layer of adhesive, undesired vibrations of structural parts of the pickup during playback are prevented by providing at least that part of the surface of the pickup where the pressure transducer is connected to the scanning element with a layer of a hardened casting mass, which is applied in the liquid state in which it has a viscosity of between 5 and 50 cP at 20.degree.C. Preferably, the remainder of the surface of the pickup is also covered with such a coating, with the exception of the scanning surface of the scanning element.

REFERENCES:
patent: 3691318 (1972-09-01), Schuller

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