| 摘要 |
An upstanding tubular member is provided and the lower end of the tubular member is open and defines a downwardly opening mouth of generally circular cross section. An elongated coil spring is supported from the lower end of the tubular member in position extending across the mouth from one side thereof to the other with the spring spaced to one side of the diameter of the mouth paralleling the spring. The mouth, other than the spring, is at least substantially free of obstructions to the passage of a ball upwardly therethrough of a diameter at least slightly greater than the distance between the spring and the side of the mouth on the other side of the aforementioned diameter thereof. The upper end portion of the tubular member is secured upwardly through the central portion of the bottom of an upwardly opening receptacle and the upper side walls of the receptacle are braced relative to the upper end of the tube and the upper end of the receptacle includes a bail-type handle.
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