| 摘要 |
An improved sight holder for an archery bow including an accurate and rapidly adjustable vertical adjustment, an improved adjustment with axial direction to the arrow. The holder is easily used. The vertical adjustment uses a novel double-threaded screw device so as to achieve both a rapid adjustment by a coarse screw and a delicate adjustment by a fine screw with both threads cut into the same screw shaft and separately engageable nut devices. The adjustment on the line of flight is improved by use of a bar which is tapered to allow a forced tight fit to be accomplished by use of a finger-operated set screw.
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