US 6,981,329 B1
Fiber optic peep sight
David Michael Strathman, 1535 St. Loretto Dr., Florissant, Mo. 63033 (US)
Filed on Dec. 26, 2003, as Appl. No. 10/746,748.
Int. Cl. F41G 1/467 (2006.01)
U.S. Cl. 33—265 52 Claims
OG exemplary drawing
 
1. A peep sight for an archery bow having a multi-strand bowstring, comprising a shallow frustum-like body having first and second faces and a sighting aperture positioned extending through said frustum-like body between said first and second faces, at least four strand engaging portions distributed about the periphery of said frustum-like body, said frustum-like body being positionable generally cross-wise to the axis of the bowstring and with said strand engaging portions engaging separate strands of the multi-strand bowstring while the bowstring is in its nominal position with the bow uncocked, said strand engaging portions positioned to provide to a user a generally unobstructed sightline through the separated strands of bowstring and said sighting aperture as the bowstring its drawn back by the user and the frustum-like body is moved through an arc back toward the user, a pair of filamentary cross-pieces extending generally cross-wise across said sighting aperture and defining a generally centralized cross-hair location in said sighting aperture, said cross-pieces having light enhancement properties and being responsive to ambient light impinging upon the sides of said cross-pieces to luminesce, the view through the sighting aperture becoming open to view and the cross-hair location becoming visible to define a target peep as the bowstring is drawn back to the user to cock the archery bow, movement of the cross-pieces to a position near to the eye of the user when the bowstring is drawn back to the user inducing a proximal blur of said cross-pieces in the user's eyesight, the luminescing cross-pieces enhancing the viewability of the proximal blur when said cross-pieces are positioned near to the eye of the user, said cross-hair location appearing to the user, without necessity for an associated external power supply or artificial light source, when the bowstring has been drawn back to the user to cock the archery bow and said cross-pieces are positioned near to the eye of the user, as a luminescent proximal blur through which a desired target point is viewable for sighting and targeting, whereby the user can, when the bowstring has been drawn back to the user to cock the archery bow and without necessity for an associated external power supply or artificial light source even in low light conditions, sight upon a target and align a desired point in the line of sight with the luminescent proximal blur of said cross-hair location.