Patent ID: 7927240
Filing Date: 2011-04-19
Classification: F21V,F42B

Abstract:
1. A lighted archery nock assembly adapted to be joined with an arrow shot from an archery bow, the lighted nock assembly comprising: an arrow nock defining a groove adapted to engage a bowstring; a battery including a pair of electrical terminals for providing electrical power; circuitry electrically coupled to said pair of electrical terminals of said battery and joined with said arrow nock, said circuitry including: wherein said controller pulse width modulates illumination of said light source as a function of said accelerometer output to conserve battery life by selectively completing a circuit between said battery and said light source; wherein said pulse width modulation is triggered in response to said accelerometer output indicative of acceleration of said lighted nock assembly exceeding a pre-set threshold acceleration; and wherein said pre-set threshold acceleration is established as a function of G forces that accompany shooting the arrow from the archery bow.