Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
Patent
1979-09-24
1982-12-14
Konick, Bernard
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Mechanical modification or sensing of storage medium
369147, H04R 904, H04R 916
Patent
active
043641202
ABSTRACT:
A phonograph pickup cartridge of moving coil type comprises a cartridge body and a stylus assembly detachably mounted on the body. The body includes a housing which firmly holds a permanent magnet and a pair of pole pieces. Magnetic gaps are defined between the pair of pole pieces in the region of the lower opening of housing. The housing carries a plurality of electrical terminal pins, which have their one end projecting externally from the rear end of the housing and which have their other end projecting through the bottom of the housing. The stylus assembly includes a knob member which supports a stylus subassembly having an armature which carries a pair of coils, and which also supports a plurality of electrical connectors which are adapted to be detachably coupled with the terminal pins. The ends of the coils are electrically connected with the connectors. When the terminal pins are engaged with the connectors, the pair of coils on the stylus assembly are properly disposed in the magnetic gaps defined between the pole pieces on the body.
REFERENCES:
patent: 2639156 (1953-05-01), Ward
patent: 3299219 (1967-01-01), Madsen
patent: 3679843 (1972-07-01), Cho
patent: 3700829 (1972-10-01), Anneberg et al.
patent: 3760125 (1973-09-01), Laue
patent: 3851117 (1974-11-01), Kuhn
patent: 4093833 (1978-06-01), Tsukamoto
patent: 4205856 (1980-06-01), Hayashi
patent: 4263483 (1981-04-01), Obata
Kabushiki Kaisha Audio-Technica
Konick Bernard
McElheny Jr. Donald
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