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1. 发明授权

US4185835A Gramophone pick-up arms 失效
标题翻译：留声机拾音臂
公开(公告)号：US4185835A
公开(公告)日：1980-01-29
申请号：US912779
申请日：1978-06-05
申请人： Alastair J. Robertson-Aikman
发明人： Alastair J. Robertson-Aikman
IPC分类号： G11B3/14 , G11B3/16 , G11B3/10
CPC分类号： G11B3/16
摘要： A gramophone pick-up arm has a balance weight arrangement which comprises a selectable number of lead laminations contained in a molded plastic box constituting a main balance weight casing which is adjustable in two directions, one direction being aligned with the axis of the arm at its pivotal and rotational bearings and the second direction being aligned with the pivotal axis of the arm. Light weight plastic spacers may be included in the box to prevent the lead laminations from moving about therewithin. The main balance weight casing carries a pair of flanking rider weights arranged laterally with respect to the length of the arm, one of the rider weights being provided with a micrometer screw adjustment whereby its position relative to the main balance weight casing can be precisely set for fine control, and the other rider weight providing coarse control and being indexable between forward and rearward limiting positions. Apart from the weights per se, all components of the balance weight arrangement are formed of precision molded glass or carbon fiber loaded plastic, as also is a bearing carrier into which the arm proper plugs, and from which the balance weight arrangement is adjustably carried, and integral with which are knife-edge bearing portions. The arm proper is a titanium tube processed in an atmosphere of nitrogen so as to develop a hard titanium nitride outer layer.
摘要翻译：留声机拾音臂具有平衡配重装置，其包括可选择数量的引线叠片，其包含在构成主平衡重壳体的模制塑料盒中，所述主平衡重壳体可在两个方向上调节，一个方向与臂的轴线对准枢转和旋转轴承，并且第二方向与臂的枢转轴线对准。盒子中可能包含轻质塑料垫片，以防止铅片在其间移动。主平衡重壳体承载相对于臂的长度横向设置的一对侧翼骑手重量，其中一个骑手重量具有千分尺螺丝调节，由此其相对于主平衡重壳体的位置可精确地设定为精细控制，另一个骑手重量提供粗略控制，并且可以在前后限制位置之间进行转位。除了重量本身之外，平衡配重装置的所有部件均由精密模制玻璃或碳纤维装载的塑料形成，并且臂本身也可插入其中并由平衡重装置可调节承载的承载载体，并且与刀沿轴承部分成一体。臂本体是在氮气气氛中加工的钛管，以形成硬的氮化钛外层。

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