Nonrecorded section detection in an automatic record

Details Nonrecorded section detection in an automatic record Nonrecorded section detection in an automatic record

1978-09-28

1980-10-07

Phillips, Charles E.

Undertaking

G11B 1706

Patent

active

042264251

ABSTRACT:
A nonrecorded section detection sensor is mounted on a sensor arm which is rotatable around a shaft, to which a drive mechanism is connected to scan the nonrecorded section detection sensor above a disc. A slit plate is fixed to the shaft to detect the rotation of the shaft, whereby the address of a nonrecorded section provided between two adjacent tracks recorded on the disc is detected. Another slit plate is fixed to a tonearm drive shaft to detect a current address of a pickup cartridge mounted on a tonearm. A control circuit functions to locate the pickup cartridge at a beginning position of a selected track through the use of information related to the addresses of the nonrecorded section and the pickup cartridge.

REFERENCES:
patent: 2056372 (1936-10-01), Schwartz
patent: 3937903 (1976-02-01), Osann

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