Street light refractor

Claim 1

AN ELONGATED REFRACTOR FOR CONTROLLING THE VERTICAL ANGLES OF DOWNWARDLY TRANSMITTED LIGHT FROM AN ELONGATED HORIZONTAL LIGHT SOURCE, SAID REFRACTOR HAVING AN UPPER SURFACE, A PLURALITY OF LIGHT SPLITTING PRISMS ARRANGED IN SIDE BY SIDE RELATIONSHIP ON THE UPPER SURFACE OF SAID REFRACTOR AND EXTENDING TRANSVERSELY OF THE LONGITUDINAL AXIS THEREOF, EACH OF SAID LIGHT SPLITTING PRISMS HAVING A PAIR OF FACES SYMMETRICALLY DISPOSED ON EITHER SIDE OF A VERTICAL PLANE THROUGH THE APEX THEREOF, SAID FACES OF SAID LIGHT SPLITTING PRISMS BEING DISPOSED AT SUCH ANGLES RELATIVE TO THE VERTICAL AND TO THE LONGITUDINAL AXIS OF SAID REFRACTOR THAT ALL LIGHT, EMITTED TOWARD SAID PRISMS IN DIRECTIONS TRANSVERSE THERETO, AND STRIKING ANY ONE OF SAID LIGHT SPLITTING PRISMS AT ALL ANGLES BETWEEN THE HORIZONTAL AND THE VERTICAL IS TRANSMITTED BETWEEN ANGLES ON EITHER SIDE OF NADIR AND THE HORIZONTAL, WITH THE MINIMUM POSSIBLE LIGHT BEING TRANSMITTED VERTICALLY DOWNWARD, AND A SERIES OF SPACED, DOWNWARDLY EXTENDING ELEMENTS OF A DEPTH TO ECLIPSE ALL LIGHT ABOVE SUBSTANTIALLY 15* BELOW THE HORIZONTAL, SAID ELEMENTS EXTENDING TRANSVERSELY TO THE LONGITUDINAL AXIS OF SAID REFRACTOR AND INCLUDING VERTICALLY SPACED HORIZONTAL REFRACTING RIBS, THE FACES OF SAID REFRACTING RIBS BEING DISPOSED AT SUCH ANGLES RELATIVE TO THE HORIZONTAL THAT THE LIGHT WHICH IS ECLIPSED BY SAID ELEMENTS IS DEPRESSED TO SUBSTANTIALLY 15* BELOW THE HORIZONTAL.