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1. 发明授权

US3888493A Apparatus for inhibiting a plurality of records from being disposed on a turntable 失效
标题翻译：用于禁止多个记录被设置在转盘上的装置
公开(公告)号：US3888493A
公开(公告)日：1975-06-10
申请号：US46276974
申请日：1974-04-22
申请人： RCA CORP
发明人： TORRINGTON LESLIE ALBERT , STAVE FREDERICK ROLAND
IPC分类号： G11B17/028 , G11B19/20 , G11B15/00 , G11B3/60
CPC分类号： G11B17/0281 , G11B19/2009
摘要： A disc type record player incorporates apparatus for preventing more than one record disc from being disposed in operative position on a turntable at any one time. Movable members associated with a turntable spindle are operatively repositioned in response to passing a first record disc over the spindle and onto the turntable. The repositioned members inhibit passage of a further record disc over the spindle. Player operation is inhibited when a sensing means detects the presence of a further record on the spindle.
摘要翻译：盘式记录播放器包括用于防止多于一个记录盘在任何一个时间被设置在转台上的操作位置的装置。响应于将第一记录盘通过主轴并转移到转台上，与转盘主轴相关联的可动构件被可操作地重新定位。重新定位的构件禁止另一个记录盘通过主轴。

2. 发明授权

US3873765A Disc playback system with speed control of a belt drive 失效
标题翻译：带速驱动的DISC回放系统
公开(公告)号：US3873765A
公开(公告)日：1975-03-25
申请号：US48032974
申请日：1974-06-18
申请人： RCA CORP
发明人： SCHOOP JAMES CONRAD , STAVE FREDERICK ROLAND
IPC分类号： G11B19/24 , G11B19/28 , H04N5/781 , H04N5/76 , G11B17/00 , H02K7/10
CPC分类号： G11B19/24 , G11B19/28 , H04N5/781 , Y10S388/932
摘要： A speed control system for a video disc playback system utilizes a speed change mechanism which permits the speed of the disc turntable to be varied without affecting the speed of the drive motor. A drive belt is coupled in non-slip relation to the disc turntable and the drive motor causing the turntable to rotate and thereby establish a relative motion between a video disc record mounted on the turntable and a pickup device. The free running speed of the turntable is above the normal operating speed required for proper operation of the playback system. A brake mechanism adjusts the speed of rotation of the turntable to control the speed of the relative motion between the disc record and the pickup device. The drive belt is yieldable such that the turntable can be adjusted to have a speed of rotation which is asynchronous with respect to the speed of rotation of the drive motor.
摘要翻译：用于视频盘播放系统的速度控制系统利用一种速度改变机构，其允许改变盘转台的速度，而不影响驱动电机的速度。驱动皮带与盘转盘和驱动马达以滑动关系联接，使得转盘旋转，从而在安装在转盘上的视盘记录和拾取装置之间建立相对运动。转盘的自由运行速度高于正常操作播放系统所需的正常操作速度。制动机构调节转盘的旋转速度以控制盘记录和拾取装置之间的相对运动的速度。驱动带可屈服，使得转盘可以被调节成具有相对于驱动马达的转速而异步的旋转速度。

3. 发明授权

US3871663A Record contact spindle 失效
标题翻译：记录接触主轴
公开(公告)号：US3871663A
公开(公告)日：1975-03-18
申请号：US34054573
申请日：1973-03-12
申请人： RCA CORP
发明人： STAVE FREDERICK ROLAND
IPC分类号： G11B3/58 , G11B3/60 , G11B9/06 , G11B17/028 , H04N5/781 , H04N5/82 , H05F3/02
CPC分类号： G11B17/0282 , G11B9/06
摘要： One type of video disc record reproducing system senses the capacitance between a stylus and the disc record to reconstruct the video information. The stylus includes a thin conductive element electrode and rides on the record, which is rotated at high speeds. The record, which includes a conductive layer covered with a thin dielectric material, is susceptible to accumulating an electric charge. Disposing a pickup device such as a stylus in proximate or contacting relation with such a charged record disc can produce a destructive discharge of the record through the pickup device which results in damage to the stylus. To minimize the occurence of such damage, the disc record is contacted by means which provide a conductive path through the record spindle to a point of reference potential for the system. In one arrangement, the spindle has a slide bar spring biased to be within the periphery of the spindle when the spindle is stationary. Upon rotation of the spindle, the bar extends out of the spindle to contact the record surface. In a further arrangement, a grounding flipper is pivotally mounted in the spindle. The flipper passes through the record hole and is spring biased to bear against the record surface.
摘要翻译：一种类型的视盘记录再现系统感测到触控笔和盘记录之间的电容，以重构视频信息。触针包括薄导电元件电极，并且在高速旋转的记录上骑。包括用薄介电材料覆盖的导电层的记录易于积聚电荷。将诸如触针的拾取装置配置成与这种充电的记录盘接近或接触的关系可以通过拾取装置产生记录的破坏性放电，这导致对触针的损坏。为了最小化这种损坏的发生，通过将通过记录主轴的导电路径提供给系统的参考点的装置来接触盘记录。在一种布置中，当主轴静止时，主轴具有偏置在主轴周边内的滑杆弹簧。在主轴旋转时，杆延伸出主轴以接触记录表面。在另一布置中，接地导板枢转地安装在主轴中。导板穿过记录孔并被弹簧偏置以抵靠记录表面。

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