We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
THE PROJECTION ROOM
255
Lighting the Room
(41) Projection room illumination has net, on the whole, been intelligently planned. Here are men engaged in producing certain effects upon an illuminated screen located from 50 to 150 (or more) feet away. They must have the best possible view of the screen, yet this view can be had only through a wall opening of necessarily restricted size.
(42) It is easily understood that if the wall immediately surrounding the port opening is illuminated, or if any light in the projection room shines in the eyes of the projectionist, his view of the screen is hampered. And it is a fact that even today both these bad characteristics exist in projection rooms that are otherwise quite intelligently arranged.
/
gj (7
<7LOSS WH/TE L ICHT WHEN PROJECT H
METAL COVEFOR BRILLIANT L/GHT
CONDU/T
TROUBLE LAMPSOCKET
PROJECTOR. LAMP HOUSE
Figure 70
(43) Enter any well illuminated projection room, take your place in working position beside a projector, watch the screen — then suddenly have the room illumination turned off. You will be amazed at the increased clearness with which the picture details on the screen can be discerned.
( 44 ) Following is what we regard as a good plan for projection room illumination. Fig. 70 shows an end view of a sheet metal cove attached to the ceiling, its length extending to within six feet or less of each wall.
The cove should be located over the rear end of the projector lamphouses. Its interior, the ceiling from it to the rear wall .and a sizable section of the rear wall