Disc player and stylus therefor

In a disc playback system including a turntable for rotating a spiral grooved disc record of the type with contains an information track in the groove thereof, the combination comprising:

• 1. a stylus including an oblong element having a tapering tip at one end thereof, said tip having:
• a. a bottom, said bottom having edges defining generally a right triangular shape;
• b. a knife edge, extending upward from an apex of said triangular shaped bottom of said tip at an angle obtuse to the bottom and lying at an intersection of first and second sides of said tip;
• and
• c. a substantially flat rear face terminating at a base edge of said right triangular shaped bottom;
• and
• 2. means for mounting said stylus in a manner permitting stylus reception in a record groove during record playback with an orientation of said stylus tip such that said knife edge extends from said apex to a point above said groove which lies closer to the axis of rotation of said turntable than said apex does, and the direction of movement of said turntable beneath the point of stylus reception extends from said apex toward said base edge.

In a disc playback system including a turntable for rotating a spiral grooved disc record of the type which contains an information track in the groove thereof, the combination comprising:

• 1. a stylus including:
• a. an oblong support element tapering to a tip at one end thereof, said tip having an essentially flat rear face, a first side, a second side, and a right triangular shaped bottom;
• said face and sides terminating at base, altitude and hypotenuse edges of said bottom, respectively;
• b. a knife edge, extending upward from an apex of said triangular shaped bottom remote from said base edge at an angle obtuse to the bottom, and lying at an intersection of said first and second sides;
• and
• c. an electrode disposed on said rear face;
• and
• 2. means for mounting said stylus in a manner permitting stylus reception in a record groove during record playback with an orientation of said stylus tip bottom such that said stylus tip side terminating at said altitude edge of said bottom faces the center of rotation of said turntable, and the direction of movement of said turntable beneath the point of stylus reception extends from said apex toward said base edge.

In a disc playback system including a turntable for rotating a spiral grooved disc record of the type which contains an information track in the groove thereof, the combination comprising:

• 1. a stylus including:
• a. an oblong support element tapering to a tip at one end thereof, said tip having an essentially flat rear face, and a pair of converging sides, with one of said converging sides disposed at a first angle with respect to said rear face and with the other of said converging sides disposed at a second angle, smaller than said first angle, with respect to said rear face;
• said face and sides terminating at respective edges of the bottom of said tip, with the bottom edge at which said one side terminates being shorter in length than the bottom edge at which said other side terminates;
• and
• b. an electrode disposed on said rear face;
• and
• 2. means for mounting said stylus in a manner permitting stylus reception in a record groove during record playback with an orientation of said stylus such that said one side of said support element tip faces the center of rotation of said turntable, and the direction of movement of said turntable beneath the point of stylus reception extends from said support element bottom toward the bottom of said electrode.