Video disc playback system and pickup cartridge therefor
US4030124A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1976 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Mar 16, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pickup cartridge encloses a stylus arm carrying a stylus at one end thereof. The other end of the stylus arm is secured to a connector plate via a compliant member. A spring releasably clamps the stylus arm in a retracted position. A pair of elastic straps extend between a pair of spaced end ribs. The rear end of the cartridge has a pair of hooks for releasably retaining the pair of spaced end ribs. The rear surfaces of the elastic straps are at a certain angle with respect to the front surfaces thereof. The connector plate is secured to the slanted rear surfaces of the elastic straps to establish an angular orientation of the connector plate relative to the cartridge so that, when the stylus arm is held in the retracted position in the cartridge, the compliant member is unstressed. The connector plate is adapted to be rotated upon reception of the cartridge in a player to permit the stylus arm to protrude outside the confines of the cartridge without stressing the compliant member. The clamping spring is locatable in one of three positions relative to the cartridge. In the top position, the clamping spring retains the stylus arm in the retracted position against a stop in the ca…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.