Stackable light refractor

摘要

A stackable light refractor comprises an annular hollow tubular shaped element of light transmissive material having a large end and a pair of spaced apart inner and outer surfaces tapering toward a small end. The outer surface of the refractor includes a plurality of annular outwardly projecting ridges of prism shaped cross-section spaced between the larger and smaller ends. One of the ridges, spaced a distance closer to the larger end than the smaller end is substantially larger than the adjacent ridges and extends outwardly of the adjacent ridges on either side. The refractor is provided with a stacking element adjacent the larger end including radially inwardly extending elements adapted to engage the large ridge on an adjacent stacked refractor so that a plurality of refractors may be arranged in a stack for convenient shipment and the like without wedging between the refractors and without requiring additional spacers or other packing materials for preventing the wedging of the refractors together during shipment.