Shuttered light-control structure

Claim 1

A LIGHT-CONTROL PANEL INCLUDING IN COMBINTION: A GRID MADE OF CROSSING WALLS FORMING A PATTERN OF TRANS-GRID LIGHT PASSAGES ALIGNED IN SIDE-BY-SIDE RELATION IN PARALLEL ROWS, THE PASSAGES OF EACH ROW BEING SEPARATED BY SINGLE WALL SEGMENTS OF SAID CROSSING WALLS, ALL OF SUCH PASSAGE-SEPARATING WALL SEGMENTS OF EACH OF A NUMBER OF SAID ROWS HAVING PIVOT OPENINGS THERETHROUGH ALIGNED WITH EACH OTHER; A CORRESPONDING NUMBER OF LONG SHAFTS RESPECTIVELY EXTENDING THROUGH AND JOURNALLED IN SAID PIVOT OPENINGS THAT ARE ALIGNED WITH EACH OTHER, EACH SHAFT TRAVERSING THE LIGHT PASSAGES OF THE CORRESPONDING ROW AND PROVIDING WITHIN EACH TRAVERSED LIGHT PASSAGE A SHUTTER-SUPPORT PORTION IN THE ZONE BETWEEN THOSE WALL SEGMENTS THAT BOUND SUCH LIGHT PASSAGE AND PROVIDE THE PIVOT OPENINGS FOR SUCH SHAFT; SHUTTERS ON EACH SHAFT IN SELECTED LIGHT PASSAGES TRAVERSED BY SUCH SHAFT, EACH SHUTTER HAVING A MOUNTING PORTION EXTENDING ALONG AND ATTACHED TO A CORRESPONDING SHUTTER-SUPPORT PORTION OF SAID SHAFT IN THE CORRESPONDING LIGHT PASSAGE, SAID SHUTTER BEING OF A DIMENSION TRANSVERSE TO SAID SHAFT SO AS TO BLOCK SUBSTANTIALLY ALL LIGHT FROM PASSING THROUGH ITS RESPECTIVE LIGHT PASSAGE; AND MEANS FOR TURNING SAID SHAFT TO CHANGE THE POSITION OF THE SHUTTERS IN THEIR RESPECTIVE LIGHT PASSAGES.