| 摘要 |
An arrowhead is provided which is comprised of a cylindrical arrowhead shaft, a primary blade and a secondary blade. A longitudinal slot and two longitudinal grooves are provided in the front end of the shaft for holding the blades at right angles to each other. The rear end of the shaft is adapted for insertion in an arrow shaft. Proximate the rear end of the arrowhead shaft is a conical column support which abuts the end of the arrow shaft so as to distribute axial forces in the arrowhead shaft over the end of the arrow shaft. In front of the column support is a conical gauging circle having index slots in which the blades are supported. Guide edges which diverge rearwardly are provided on each of the blades to guide the blades into the index slots. The primary blade holds the secondary blade on the cylindrical shaft and is provided lock tabs which engage the rear surface of the gauging circle to resist primary blade removal.
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