| 摘要 |
<p>PUTTING DEVICE A device for use in practice putting, in which a barrel slides in a vertically adjustable cylinder with an inverted cup carried by the lower end of the barrel. A horizontal disc beneath the cup carries a vertical rod movable axially in the barrel with a first ball element at its upper end. A second ball element rests in an aperture of the barrel and engages a groove in the cylinder when urged into the groove by the first ball element. Upward movement of the disc moves the first ball element and causes the barrel and the cup to drop.</p> |
