Luminaire

Claim 1

AN ILLUMINATION REFRACTOR FOR ACHIEVING A PREDETERMINED PATTERN OF VISIBLE RADIATIONS, SAID REFRACTOR COMPRISING: (A) A PLURALITY OF SOLID JOINED CURVED SECTIONS OF PREDETERMINED LIMITED THICKNESS, EACH OF SAID SECTIONS BEING SUBSTANTIALLY SIMILAR IN SIZE AND SHAPE AND INTERCHANGEABLE WITH ONE ANOTHER; (B) DISENGAGEABLE LIGHT-TRANSMITTING INTERCONNECTING MEANS FORMING AN INTEGRAL PART OF OPPOSITELY DISPOSED EDGE PORTIONS OF EACH OF SAID SECTIONS AND SUBSTANTIALLY POSITIONED WITHIN THE PREDETERMINED THICKNESS DIMENSION OF SAID JOINED SECTIONS, SAID INTERCONNECTING MEANS BEING COMPLEMENTALLY FORMED AND INTERFITTINGLY ENGAGED AND JOINING TOGETHER OPPOSITELY DISPOSED EDGE PORTIONS OF EACH OF SAID SECTIONS TO AN EDGE PORTION OF OTHER OF SAID SECTIONS TO FORM A SINGLE OPEN-ENDED HOLLOW UNITARY REFRACTOR BODY, AND SAID INTERCONNECTING MEANS FORMING A PART OF EXPOSED SURFACE PORTIONS OF SAID REFRACTOR BODY; AND (C) EACH OF SAID SECTIONS HAVING PREDETERMINED LIGHTREFRACTING PROPERTIES WITH RESPECT TO LIGHT GENERATED WITHIN THE VOLUME ENCOMPASSED BY SAID REFRACTOR BODY; WHEREBY A SECTION MAY BE INTERCHANGED WITH ANOTHER ONE OF SAID SECTIONS TO ACHIEVE A PREDETERMINED LIGHT-DISTRIBUTION PATTERN.