摘要:
This invention relates to a record player used for a disc jockey (DJ), and more particularly to a record player suitable for a so-called scratch performance operation by which a phonograph record is directly rotated in forward and reverse direction to output new artificial sound by fingering of an operator which is a kind of DJ performance pattern. In order to suppress the needle skip caused when forwardly/inversely rotating the phonograph record by the finger operation, the positional relationship between the record groove on the turntable and the supporting point P of the arm shaft is defined so as to suppress inward and outward component forces applied to the needlepoint of the cartridge as possible. Therefore, three points, i.e., a start point R and an end point S of the record groove on a straight line B extending from the rotating shaft core C of the turntable in a radial pattern and a rotation center of a tone arm, namely, the supporting point P may form an isosceles triangle with the point P as an apex in a most preferable mode.
摘要:
Method and device for reducing the error of the rake angle from the tangential position on a rotating disc during the transmission of information. Essentially at one end of an arm, of which the other end is provided with a converter to transmit the signal, there is provided a guiding unit movable along a path so that it provides continuously for the tangential position of the converter. The method and the device provides for the complete elimination of the error of the angle of rake of the tangential position and are applicable whenever rotating discs carrying information are used, particularly during the manufacturing of turntables and magnetic memories of calculators requiring a small error of the angle of rake.
摘要:
Bei einem Abtastsystem für eine Platte (1) mit einer Rille, z. B. einer PCM-Tonplatte mit Druckabtastung, ist derAbtaster (13) am Ende eines federnden Tragarmes (6) befestigt, der bei der Abtastung radial zur Platte (1) geführt wird. Gemäß der Erfindung ist an dem Tragarm (6) ein zweiter Tragarm (11) gelenkig gelagert. Am ersten Tragarm (6) befindet sich ein reiner Führungskörper (8) und am zweiten Tragarm (11) der eigentliche Abtaster (13). Dadurch wird die Signalabtastung bei Ungenauigkeiten in dem Aufzeichnungsträger (1) wie z.B. Höhen- und Seitenschlägen verbessert.
摘要:
A pick-up arm for record players suitable to play recording discs, where said pick-up arm in one end is mounted to a mounting allowing the pick-up arm to pivot about an axis orthogonal to the plane of the recording discs, and where a pickup is mounted in the opposite end of the pick-up arm, characterized in that one or more apertures is/are provided in the pick-up arm, said aperture(s) penetrating through said pick-up arm.
摘要:
This invention relates to a record player used for a disc jockey (DJ), and more particularly to a record player suitable for a so-called scratch performance operation by which a phonograph record is directly rotated in forward and reverse direction to output new artificial sound by fingering of an operator which is a kind of DJ performance pattern. In order to suppress the needle skip caused when forwardly/inversely rotating the phonograph record by the finger operation, the positional relationship between the record groove on the turntable and the supporting point P of the arm shaft is defined so as to suppress inward and outward component forces applied to the needlepoint of the cartridge as possible. Therefore, three points, i.e., a start point R and an end point S of the record groove on a straight line B extending from the rotating shaft core C of the turntable in a radial pattern and a rotation center of a tone arm, namely, the supporting point P may form an isosceles triangle with the point P as an apex in a most preferable mode.