发明授权
US3740055A Audio reproducing apparatus for ramdom acess playback systems
失效
用于RAMDOM ACES播放系统的音频再现设备
- 专利标题: Audio reproducing apparatus for ramdom acess playback systems
- 专利标题(中): 用于RAMDOM ACES播放系统的音频再现设备
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申请号: US3740055D申请日: 1971-04-08
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公开(公告)号: US3740055A公开(公告)日: 1973-06-19
- 发明人: BEN DANIEL D , FIELDING J , HURWITZ H
- 申请人: BEN DANIEL D , FIELDING J , HURWITZ H
- 专利权人: Daniel D Ben,J Fielding,H Hurwitz
- 当前专利权人: Daniel D Ben,J Fielding,H Hurwitz
- 优先权: US13260371 1971-04-08; US82779269 1969-05-26
- 主分类号: G11B3/06
- IPC分类号: G11B3/06 ; G11B3/085 ; G11B3/095 ; G11B21/08
摘要:
Audio playback apparatus is disclosed including a tone arm which is positioned electromagnetically to facilitate control thereof in accordance with the position of a turntable relative to the tone arm. The apparatus is particularly suited for random access retrieval of audio information from a record including a plurality of nested spirals each corresponding to items of information on a display or selection chart. An array of switches corresponding to individual items on the display and a position selector switch assembly operated by the position of the turntable relative to the tone arm cooperate to position the stylus of the tone arm in a spiral groove corresponding to the selected portion of the display.
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