Mechanical arrow nocks

摘要

An arrow nock having a telescoping impeller and housing with resilient means for enhancing the acceleration of launch. In various embodiments, effective together or independently, the housing and impeller are configured and coupled to: create arrow rotation during launch; grip the bowstring during notching and release it during launch; and generate tracking signals.

主权项

1. An arrow nock for mounting on an end of an arrow shaft, comprising:
a housing having a longitudinal axisand, the housing having a set of first and second endsleading end and a distal end; an impeller disposed along the longitudinal axis having a first end disposed within the housing and a second end disposed outside ofand projects from the housing, wherein the impeller and the housing are moveable relative to each other; wherein movement of the housing relative to the impeller occurs rotationally and freely about the longitudinal axis; and, a retainerdepending edge to capture at least one of the ends of the impeller being a first orend and a second end of the impeller within the housing, the housing having a distal end with the depending edge defining an aperture to entrap the impeller.