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公开(公告)号：US3843846A
公开(公告)日：1974-10-22
申请号：US33072773
申请日：1973-02-08
Applicant: RCA CORP
Inventor： MILLER M
CPC classification number: G11B9/075
Abstract: To protect a playback stylus against excessive charge flow, a capacitor is provided in series circuit relationship with the electrode of the stylus assembly. The capacitor is formed of cooperating respective elements on the stylus assembly and a supporting tracking arm which are demountably intercoupled.
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Patent Agency Ranking
公开(公告)号：US3826877A
公开(公告)日：1974-07-30
申请号：US28665772
申请日：1972-09-06
Applicant: RCA CORP
CPC classification number: G11B9/075
Abstract: A video disc playback system includes a pickup stylus which is adapted to track in a groove in a disc record. The record comprises a molded thermoplastic substrate supporting a conductive surface with a dielectric coating disposed over the conductive surface. When relative motion is established between the disc record and the pickup, the pickup stylus cooperates with the disc record to establish capacitance variations between the stylus and the record due to geometrical variations in the bottom of the groove. The stylus includes a support element having an irregular surface with a conductive element disposed on the irregular surface. The support element is shaped in a manner such that when it engages the record medium groove, an edge of the conductive element is adjacent the dielectric coating.
Abstract translation: 视频光盘播放系统包括适于在光盘记录中的凹槽中进行跟踪的拾取触针。 该记录包括支持导电表面的模制热塑性基材，其中设置在导电表面上的介电涂层。 当在盘记录和拾取器之间建立相对运动时，拾纸笔与盘记录协作，以由于凹槽底部的几何变化而在触笔和记录之间建立电容变化。 触针包括具有不规则表面的支撑元件，导电元件设置在不规则表面上。 支撑元件的形状使得当其与记录介质凹槽接合时，导电元件的边缘与电介质涂层相邻。
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公开(公告)号：BR7306894D0
公开(公告)日：1974-07-25
申请号：BR689473
申请日：1973-09-05
Applicant: RCA CORP
Abstract: A video disc playback system includes a pickup stylus which is adapted to track in a groove in a disc record. The record comprises a molded thermoplastic substrate supporting a conductive surface with a dielectric coating disposed over the conductive surface. When relative motion is established between the disc record and the pickup, the pickup stylus cooperates with the disc record to establish capacitance variations between the stylus and the record due to geometrical variations in the bottom of the groove. The stylus includes a support element having an irregular surface with a conductive element disposed on the irregular surface. The support element is shaped in a manner such that when it engages the record medium groove, an edge of the conductive element is adjacent the dielectric coating.
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