Signal pickup cartridge for reproducing signals recorded on rota

Details Signal pickup cartridge for reproducing signals recorded on rota Signal pickup cartridge for reproducing signals recorded on rota

1980-04-02

1982-07-13

Phillips, Charles E.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

G11B 320

Patent

active

043398120

ABSTRACT:
A signal pickup cartridge is mounted in a signal pickup device having pivot bearings and an actuator driven by the pivot bearings in response to a control signal. The pickup cartridge comprising a cantilever provided at a distal free end thereof with a reproducing stylus for tracing along a track which is formed on a rotary recording medium lying in a horizontal plane and has an information signal recorded therealong and thereby reproducing the information signal. The cantilever is supported at a proximal base end thereof by the pivot bearings in a swingable manner and, moreover, in a manner making possible displacement thereof in the longitudinal direction thereof. The pickup cartridge further comprises pressure contact mechanism for holding the cantilever when the pickup cartridge is in the state thereof prior to the mounting thereof in the signal pickup device and for causing the proximal base end of the cantilever to be pressed into contact with the pivot bearing when the pickup cartridge is in the mounted state in the pickup device, and elastic members capable of absorbing vibration provided at one part of the pressure contact mechanism and holding the cantilever at a part thereof near the proximal base end.

REFERENCES:
patent: 3904837 (1975-09-01), Sugimoto et al.
patent: 4040635 (1977-08-01), Leedom
patent: 4160268 (1979-07-01), Goto et al.

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