Speed indicating ball
    1.
    发明授权
    Speed indicating ball 失效
    速度指示球

    公开(公告)号:US5526326A

    公开(公告)日:1996-06-11

    申请号:US359621

    申请日:1994-12-20

    IPC分类号: A63B43/00 A63B69/00 G04F1/00

    摘要: A speed indicating ball includes a timer, which is activated upon throwing of the ball, and deactivated upon catching of the ball, for measuring the ball's time of flight. The timer is connected to a display which provides a direct read out which is inversely proportional to the time of flight of the ball, and which corresponds to the relative velocity of the ball.

    摘要翻译: 速度指示球包括定时器,该定时器在投掷球时被激活,并且在捕捉到球时被停用,用于测量球的飞行时间。 定时器连接到显示器,其提供与球的飞行时间成反比的直接读出,并且其对应于球的相对速度。