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    • 3. 发明授权
    • Lowerable antenna for radio receivers
    • 用于无线电接收机的可降低天线
    • US4126820A
    • 1978-11-21
    • US830665
    • 1977-09-06
    • Bernt O. HormannEgon Frey
    • Bernt O. HormannEgon Frey
    • H01Q1/10H01Q9/14H02H7/08
    • H01Q1/103H01Q9/14
    • An antenna adapted to be extended and retracted for car radio receivers, which is actuated by means of an on-off switch of the radio receiver and is driven by an electric motor reversible in its direction of rotation; the control circuit for the electric motor includes two limit switch contacts adapted to be opened by switching cams on a disk that moves proportional to the movement of the antenna, and a further switching contact which is adapted to be actuated by a further switching cam of the disk; the further switching contact is thereby opened at and above a predetermined extended length of the antenna while a manual switch with push-button function and possibly with detent function is provided for the further selective extension or retraction of the antenna.
    • 一种适用于汽车无线电接收机的天线,该天线通过无线电接收机的开 - 关开关来驱动,并由可沿其旋转方向旋转的电动机驱动; 用于电动机的控制电路包括两个限位开关触点,其适于通过在与天线的移动成比例地移动的盘上切换凸轮来打开凸轮;以及另一个开关触点,其适于由另一个开关凸轮 磁盘 因此,在具有按钮功能并且可能具有制动功能的手动开关用于天线的进一步的选择性扩展或缩回的情况下,进一步的开关触点因此在天线的预定延伸长度上方和上方开口。