Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1979-02-26
1981-11-17
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 41, G11B 1722
Patent
active
043015263
ABSTRACT:
A tonearm control device in which tonearm position is detected by counting output pulses generated in response to a reversible electric motor output used for providing horizontal tonearm movement. A sensor is employed to detect non-recorded portions between recorded bands of music and also the initial position of a record disk. The sensor is supported on a supporting arm separate from the tonearm. The output pulses are counted in a counter of a RAM and the number of pulses corresponding to a distance between the sensor and the stylus of the cartridge is added in an adder in a CPU to the content of the counter. The output of the CPU is memorized in assigned positions of a memory in the RAM, the number of which corresponds to numbers of selected music. The contents of the memory are compared with the output pulses. When coincidence occurs, reproduction of the band of music is achieved. Hence, it is possible to change the cartridge independent of the sensor.
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patent: 3662363 (1972-05-01), Chertok
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patent: 3993315 (1976-11-01), Hansen et al.
patent: 4093832 (1978-06-01), Isaacson et al.
patent: 4114893 (1978-09-01), Leach et al.
patent: 4135086 (1979-01-01), Baba
patent: 4166621 (1979-09-01), Isaacson et al.
Kurata Junichi
Morii Takashi
Pioneer Electronic Corporation
Psitos Aristotelis M.
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