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.
582 HANDBOOK OF PROJECTION FOR
188 and 189. These magnets are therefore very important. Part 15, Figs. 188 and 189, is so made that it brings the tube back to the vertical position after it has been rocked by the action of the shaking magnet, through force of gravity. Should the tube at any time fail to rock to the vertical position, it is most likely due to friction in spindle 16, Figs. 188 and 189. This friction may be overcome by means of a drop or two of oil on the bearing surfaces, just behind the nut on the end of the bolt, and at the back of the spindle. It is also possible that dirt may work in beside plunger 17, Figs. 188 and 189. This plunger may be removed by taking out the bolt in the fork at its lower end, and driving out the small pin in nut 17 at the top of the plunger. The plunger can then be dropped down enough to clean it.
Should plunger 20 of relay 8, Figs. 188 and 189, fail to work, it may be taken out and examined by removing the split key at its upper end and pulling the plunger out at the bottom.
Should the rectifier at any time fail to act, the very first thing to examine and test will be your fuses, including those on the front of the panel. Don't try anything else until you have tested the fuses. It is quite possible you may get a spark at the carbons of the lamp when one of the fuses is burned out.
ORDERING RENEWAL PARTS.— Almost every projectionist will, sooner or later, find it necessary to replace certain parts of the rectifier equipment that wear out from usage.
IMPORTANT. — To insure correct filling of orders for such parts it is essential that the following information be given with each order:
1. Catalog number and
2. Serial number of complete rectifier equipment. (These will be found stamped upon name-plate attached to front of rectifier panel.)
3. Catalog number, specification or any distinguishing mark that may appear on the part wanted.
3A. If.no marking can be found, describe the part as clearly as possible. An accurate pencil sketch of the pari helps, too.
4. Quantity of each part wanted.
The order should then be forwarded to the nearest sale: office of the General Electric Company, or direct to its Gen eral Offices at Schenectady, N. Y.