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.
OPERATION OF SOUND EQUIPMENT 629
of the equipment need lubricating, how often, and what type of lubricant to use in each.
(e) Controls. He must know where to find all current rheostats provided in the equipment, how to adjust them, and what the proper adjustment of each should be. He must know how to control volume and how to change over between projectors.
(f) Special information. Under this heading we group an almost endless number of small details, all important. How to re-focus the exciter lamps, for example. Exciting lamp focus is managed differently in different makes of apparatus. Again, how often the storage batteries need to be re-charged (if there are storage batteries) and at what current rate. Or what is the relationship between monitor volume and theatre volume, and what volume from the monitor indicates correct volume in the theatre for average conditions. There is also what may be called, for want of a better term, precautionary information. For example, to what extent does temperature rise in any part represent normal operating condition, and at what point does its increase in temperature indicate trouble?
The projectionist confronted by a strange projection room and strange equipment can, if he has to and if he knows his fundamentals, work out most of the above information for himself, taking time and being very careful not to do any damage in the process of finding things out. But it is infinitely better to secure proper advice from someone who knows, if there is any possible way to do it.
Wiring Information
(3) The work of securing information about the projection room is not nearly ended when all the foregoing have been mastered. The above details are only matters that must be known before it is possible to get the show running. Keeping it running requires further information. Details of the projection room wiring must be known thoroughly or some minor trouble like a burnt-out fuse may hold up the performance for a long time. The