Title:
AUDIO MULTIPLEX RECORD PLATE
Document Type and Number:
Japanese Patent JPS5610
Kind Code:
A
Abstract:
PURPOSE: To enable to pick up the audio current two or more types without increasing the diameter of a record plate, by increasing the number of grooves on the record plate.
CONSTITUTION: As shown in figure, the height 2 made in parallel with the direction of revolution conventionally, has further the height 4 and the valley 3 orthogonally to the direction of revolution. Thus, the types of audio at the same diameter as conventional discs are increased and the multiplex of audio is made possible.
Inventors:
ISHIHARA SABUROU
Application Number:
JP7298279A
Publication Date:
January 06, 1981
Filing Date:
June 12, 1979
Export Citation:
Assignee:
ISHIHARA SABUROU
International Classes:
G11B3/72; G11B3/74; (IPC1-7): G11B3/74
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