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.
MANAGERS AND PROJECTIONISTS
691
tary motion in cylinder b. A diagonal slot in this cylinder, in contact with a pin fastened to arm C, causes the arm to move outward ; but as arm C operates as a lever, with its fulcrum at point D, the other end of the arm at E moves inward, thus disengaging pin F from the driving pulley G. This breaks the connection whereby motion is transmitted to take-up sprocket H, and the sprocket stops revolving. The loop reforms instantly, and roller A is forced back into its original position by coil spring I. Pin F immediately re-engages with driving pulley G, and the take-up sprocket H starts to revolve again as a natural consequence. The whole train of operation is automatic — its results instantaneous.
INSTRUCTION NO. 41— Always wipe edges of aperature before threading.
INSTRUCTION NO. 42— ADJUSTING 6A TAKE-UP TENSION. — The take-up tension is adjusted by setting the collar on pulley end of spindle in or out, thus applying more or less pressure to the spring which holds the two halves of the grooved, split pulley together. Tension is not regulated by the belt, but by the two halves of the pulley rubbing together under more or less friction, according to how much is supplied by Sie spring. Take kjR the belt and pull the two halves of the pulley apart a little and you will see how it works. There should be no more tension than barely enough to revolve the reel when it is full. Anything more is very hard on the film and tends to cause loss of the lower film loop. See General Instruction No. 23.
Plate 10, Figure 244.