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    • 11. 发明授权
    • Dial pointer driver assembly for radio receiver
    • 无线电接收器的拨号指针驱动器总成
    • US3756191A
    • 1973-09-04
    • US3756191D
    • 1972-09-25
    • MOTOROLA INC
    • OLAH E
    • H01F21/06H03J1/04H03J1/06H03J5/08H03J1/02
    • H03J1/045Y10T74/18992
    • A dial pointer assembly for a manually tunable radio receiver includes a slide member carrying a pointer and mounted for movement along a path parallel to a dial scale. Coupled between the slide member and a movable variable frequency tuning core carriage of the radio receiver is a parallelogram linkage including a plurality of pivotally interconnected arms which serve to define portions of first and second parallelograms; the arms of the second of which are shorter in length than those of the first. A point of interconnection of a pair of arms of the second defined parallelogram is coupled operatively to a driver mechanism including a bell crank connected to the core carriage. Movement of the latter by operation of the manual tuning controls of the radio receiver; i.e., pushbutton or manual control knob, drives the pointer mechanism with respect to the dial scale. The movement of the slide member and pointer mechanism is magnified by the ratio of the length of an arm of the first parallelogram with respect to the length of an arm of the second.
    • 用于手动可调谐无线电接收机的拨号指针组件包括承载指针并且被安装用于沿着平行于刻度盘的路径移动的滑动构件。 耦合在滑动构件和无线电接收机的可移动可变频调谐核心托架之间是平行四边形连杆,包括多个枢转互连的臂,其用于限定第一和第二平行四边形的部分; 其中第二个的长度比第一个的长度短。 第二限定的平行四边形的一对臂的互连点可操作地联接到包括连接到芯托架的钟形曲柄的驱动器机构。 通过操作无线电接收机的手动调谐控制来实现后者的移动; 即按钮或手动控制旋钮相对于刻度盘驱动指针机构。 滑动构件和指针机构的移动通过第一平行四边形的臂的长度相对于第二平行四边形的臂的长度的比率被放大。