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公开(公告)号：US4046386A
公开(公告)日：1977-09-06
申请号：US661983
申请日：1976-02-27
申请人： Alexander Bennett Gosling , Keith Douglas Ridler , Frederick James Easthope , Colin Howard Stanwell-Smith
发明人： Alexander Bennett Gosling , Keith Douglas Ridler , Frederick James Easthope , Colin Howard Stanwell-Smith
CPC分类号： G11B3/08519
摘要： Method and apparatus for accurately controlling the position of a first member such as a phonograph stylus relative to a second movable member on which it is carried.
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公开(公告)号：US4032158A
公开(公告)日：1977-06-28
申请号：US610091
申请日：1975-09-03
申请人： Colin Howard Stanwell-Smith , Dexter Robert Plummer , Frederick James Easthope , Jonathan Humfrey Pope
发明人： Colin Howard Stanwell-Smith , Dexter Robert Plummer , Frederick James Easthope , Jonathan Humfrey Pope
CPC分类号： G01B11/272
摘要： A tone arm for a record player having a mirror at one end is provided. Opposite the mirror are a light source and two detector elements. When the tone are pivots from a desired angle light from the source is reflected upon the element more than on the other. The mirror is convexly curved so that pivotal motions of the tone arm in one plane will not affect the amount of light reaching the detectors.
摘要翻译： 提供具有在一端具有镜子的记录播放器的色调臂。 镜子对面是一个光源和两个探测元件。 当音调从所需角度枢转时，来自源的光线反映在元件上而不是另一个上。 镜子是凸形弯曲的，使得一个平面中的色调臂的枢转运动不会影响到达检测器的光量。
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公开(公告)号：US4024473A
公开(公告)日：1977-05-17
申请号：US591401
申请日：1975-06-30
摘要： An arrangement for use in indicating the speed of rotation of a body including a switch operated by elements which rotate according to the rotation of the body, a frequency generator which has an output signal at a frequency related to the desired speed of rotation of the body and an indicator which is actuated in accordance with the signals from both the switch and the frequency generator.
摘要翻译： 一种用于指示主体的旋转速度的装置，其包括由根据本体的旋转而旋转的元件操作的开关，频率发生器，具有与所述主体的所需旋转速度相关的频率的输出信号 以及根据来自开关和频率发生器的信号致动的指示器。
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