Device for mechanically recording a signal having a bandwidth of several MHz, particularly for a video disc
US4194094A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1978 |
| Grant date | Mar 18, 1980 |
| Priority date | — |
| Expiry date | Nov 21, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/445
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for mechanically recording a signal having a bandwidth of several MHz on a receiving surface, particularly on a video disc, comprises, a rigid housing having a stylus receiving cavity with a piezoelectric transducer mounted in said cavity which is adapted to oscillate backwardly and forwardly. A cutting stylus is connected to the transducer and projects out of the housing cavity for cutting the receiving surface. Damping means are disposed between the transducer and the housing in the cavity and provide a greater resilience for movement of the transducer in the direction of oscillation than in a direction perpendicular thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.