The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 1981
Filed:
Feb. 26, 1979
Takashi Morii, Tokorozawa, JP;
Junichi Kurata, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
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.