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.
550 MOTION PICTURE PROJECTION
framing cam opening A-7, P.4 and insert shaft S-444-G, P.4 into bearing; then push both casing and gear G-133-G, P.3 into place together. At this point we come to a most interesting and necessary detail which is worthy of explanation; inasmuch as the completely assembled mechanism is "ground-in" at the factory, until certain vital gears are engaging smoothly and noiselessly with one another, and in order that the same teeth of these gears will be again enmeshed should the gears ever become disengaged a system of marking is resorted to, whereby an "0" mark is placed upon gear G-133-G, P.3 and also upon outer surface of fly wheel, this latter marking indicating a certain gear tooth on fly wheel gear G-148-B, P.4 which is quite hidden from view and therefore difficult in itself to mark.
It is now necessary to line these "0" marks up with one another in order that the original "ground-in" teeth of gears will engage as they did when mechanism was first assembled. This is done by turning gear G-133-G, P.3 around toward fly wheel, and then by pulling fly wheel outward until fly wheel gear is disengaged, turn fly wheel toward marked gear until the "0" mark on gear and the "0" mark on fly wheel are directly in line with one another. Now that these markings are lined up, pull gear G-133-G, P.3 outward, and turn vertical shaft gear G-120-G, P.4 until large end of the taper pin is same P-107-G, P.4 is directly lined up with "0" mark on gear G-133-G, P.3, after which push the latter gear into place, and also make sure that locating pin on the upper part of A-7, P.4 enters its engaging hole in intermittent casing rim, which places the casing in its