Electromagnetic pickup cartridge having elongate core elements

Details Electromagnetic pickup cartridge having elongate core elements Electromagnetic pickup cartridge having elongate core elements

1980-04-11

1986-12-16

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

369146, 369149, H04R 1112

Patent

active

046302530

ABSTRACT:
Disclosed in a high-performance electromagnetic pickup cartridge with little distortion, comprising a stylus attached to the end of a cantilevered arm, a disk type armature magnetized in its axial direction and secured to the arm, and bar type magnetic core elements disposed in the vicinity of the armature so that they are at right angles to the axis of the cantilevered arm and correspond to each channel of a stereophonic record. When the armature is vibrated, an output signal is generated in respective coils wound around the core elements. Because of the above-described construction, the core elements need only have a bar-shaped configuration without the necessity for opposing faces between which a magnet or an iron piece would otherwise have to be inserted.

REFERENCES:
patent: 3062925 (1962-11-01), Pritchard
patent: 3294405 (1966-12-01), Pritchard
patent: 3627931 (1971-12-01), Matsuda

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