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20 条记录 (耗时 0.016 秒)

    Pickup arm device dynamically damped
    1.
    发明授权
    Pickup arm device dynamically damped 失效
    拾音臂装置动态阻尼

    公开(公告)号：US4079943A

    公开(公告)日：1978-03-21

    申请号：US750596

    申请日：1976-12-15

    申请人： Katsuhiko Morita ,  Hiroshi Yasuda

    发明人： Katsuhiko Morita ,  Hiroshi Yasuda

    IPC分类号： G11B3/14 ,  G11B3/18 ,  G11B3/16

    CPC分类号： G11B3/14 ,  G11B3/18

    摘要： A phonograph pickup arm device wherein one end of a balance weight is connected to one end of an arm through a spring, and a first magnet is supported at the other end of the weight and is immersed in a viscous oil. A second magnet is disposed for displacement toward or away from the first magnet for adjusting the magnetic force acting therebetween so that the compliance of the device which is related to the arm resonance frequency, may be changed and consequently the arm resonance amplitude may be substantially reduced.

    摘要翻译： 一种留声机拾取臂装置，其中平衡重的一端通过弹簧连接到臂的一端，第一磁体被支撑在重物的另一端并浸入粘稠的油中。 第二磁体设置成朝向或远离第一磁体移动，用于调节作用在其间的磁力，使得可以改变与臂共振频率相关的装置的顺应性，并且因此臂共振幅度可以显着减小 。

    Cueing control
    4.
    发明授权
    Cueing control 失效

    公开(公告)号：US3973777A

    公开(公告)日：1976-08-10

    申请号：US537565

    申请日：1974-12-30

    申请人： Dwipendra Nath Guha

    发明人： Dwipendra Nath Guha

    IPC分类号： G11B3/08 ,  G11B3/18 ,  G11B3/10

    CPC分类号： G11B3/08 ,  G11B3/18

    摘要： The present invention provides, in a record player, a cueing control means embodying a hydraulic control member which utilizes the viscosity of a fluid of high internal friction and which provides for a substantially uniform rate of withdrawal of the needle from the groove and a uniform rate of return of the needle to the groove. The rate of movement may be adjusted but preferably remains the same within the cycle of withdrawal of the needle and its return to the groove. This substantially obviates change in tone or pitch which will occur if the rate of withdrawal differs from the rate of needle reentry into the groove. The hydraulic fluid employed in the preferred embodiment of the invention is one or more discrete bodies of silicone grease, or its equivalent. This material is stable under a wide range of conditions of temperature and pressure. It is cohesive and is inert to metals with which it is in contact. It has a high surface tension and a high viscosity and even though exposed to the atmosphere retains the aforesaid characteristics without deterioration over long periods of time. Thereby the rate of withdrawal of the needle from the groove and the rate of restoration of the same to the groove are maintained substantially uniform, and the introduction of a change in tone due to variation in the rate of movements involved in the cueing operation is avoided. The mechanism involves a brake to hold the needle in fixed radial (groove) position from the initiation of the cueing operation to the termination thereof. The timing of the movement of the brake to hold radial position of the needle and lifting pin is critical to the proper performance of the cueing means and the playing of the record. The brake applies a small frictional drag to the tone arm to stop it from moving laterally just prior to the needle starting to come out of the groove. When cueing the arm manually, or in an automatic mode, the needle should always be returned to the same passage of the record where cueing was begun. The brake is timed to be applied just before the tone arm lifts the needle off of the record and remains on during the cueing operation. The applied brake force results in lateral frictional resistance that exceeds the antiskate force of the needle in the groove. The timing control is inherently good in the present disclosure seeing that the lift and brake actions stem from the same rocker plate.

    Tone arm damping device
    7.
    发明授权
    Tone arm damping device 失效
    音臂阻尼装置

    公开(公告)号：US4305147A

    公开(公告)日：1981-12-08

    申请号：US076535

    申请日：1979-09-18

    申请人： Junichi Onishi

    发明人： Junichi Onishi

    IPC分类号： G11B3/18 ,  G11B3/32

    CPC分类号： G11B3/32 ,  G11B3/18

    摘要： A tone arm damping device which provides damping for both horizontal and vertical vibration forces utilizing a single damping mechanism. A gimbal-type support structure includes first and second rotatable bodies rotated respectively from a fixed shaft and from each other. The second or inner rotatable body has formed therein an annular reservoir of damping fluid. A fluted damping ring, attached through an adjustment mechanism to the fixed shaft, extends into the fluid reservoir. The extent of the damping ring into the fluid and hence the amount of the damping force may be set by the adjustment mechanism.

    摘要翻译： 一种音臂阻尼装置，其利用单个阻尼机构为水平和垂直振动力提供阻尼。 万向型支撑结构包括分别从固定轴和彼此旋转的第一和第二可旋转体。 第二或内部可旋转体在其中形成有阻尼流体的环形储存器。 通过调节机构连接到固定轴的槽形阻尼环延伸到流体储存器中。 阻尼环到流体中的程度以及阻尼力的量可由调节机构设定。

    Disk drive suspension having dual vibration damper
    10.
    发明授权
    Disk drive suspension having dual vibration damper 有权
    具有双重减振器的磁盘驱动器悬架

    公开(公告)号：US09368129B1

    公开(公告)日：2016-06-14

    申请号：US14806789

    申请日：2015-07-23

    申请人： Magnecomp Corporation

    发明人： Peter Hahn ,  Steve Misuta

    IPC分类号： G11B3/12 ,  G11B3/18 ,  G11B5/48

    CPC分类号： G11B3/12 ,  G11B3/124 ,  G11B3/18 ,  G11B5/4833

    摘要： A vibration damper for a suspension has two different viscoelastic layers and two different constraint layers. The two viscoelastic layers can be tailored to have different properties, including different viscosities and/or peak vibration frequency damping at different frequencies. The vibration damper exhibits improved vibration damping as compared to a single layer damper having the same overall thickness at critical frequencies.

    摘要翻译： 用于悬架的减震器具有两个不同的粘弹性层和两个不同的约束层。 两个粘弹性层可以被定制成具有不同的性质，包括在不同频率下的不同粘度和/或峰值振动频率阻尼。 与在临界频率下具有相同总厚度的单层阻尼器相比，减震器表现出改进的减振效果。