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.
an unsteady picture, for instance.
It is sometimes possible to reverse the sprocket-wheels on some 9.5 and 16-mm. silent machines so that the sprockets are given even wear, but this should not be attempted on any 8-mm. or any sound projector other than post-1950 9.5 mm. models. You should be able to see at once whether the sprocket-wheel can be reversed or not by the design.
Sprocket-wheel guards or pads also have to be periodically inspected, especially to see that they maintain the correct clearance when in the closed position.
Your gate-brush can be used to clean the sprockets and rollers, taking care to clean the inside of the rims and making sure that all dirt is removed.
The Daily Clean
Look after the projector blimp and loud-speaker case, and keep them cleaned and protected by using a wax polish. The speaker case, however, should not be highly polished, as reflecting surfaces near the screen may spoil the picture.
The cables and leads (but not flex) should occasionally be cleaned with a moistened cloth, but have everything dry before starting the show.
Every day, and just before starting a show, the operator should carefully clean the following: — Projection lens, Condensers, Lamp, Sprockets and Idler-Rollers, Gate or Film Channel, and any other parts requiring cleaning. Dust the exposed parts of the sound optical system with extreme care and gentleness — a camel hair-brush or feather should be used. Avoid using any materials likely to scratch.
The Weekly Clean
When a projector is in regular use, it becomes necessary to carry out a servicing routine at least once a week or after every ten shows. This routine should be designed to detect signs of wear and also to give attention to any minor faults before they have the chance to develop into major ones. The items now listed will help you to make a methodical check.
Before carrying out any repairs or cleaning, switch off and disconnect the mains cable.
I. Examine the objective and condenser lens. See that all
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