Motion picture projection : an elementary text book (1928)

Record Details:

Title:
Motion picture projection : an elementary text book
Date:
1928
Publisher:
New York : Technical Book Company
Volume:
Motion picture projection : an elementary text book
Leaf #:
000696
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Niles Essanay Silent Film Museum
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
September 21, 2023
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




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.

690 MOTION PICTURE PROJECTION will then be indicating combined voltage of the two arcs.) To discontinue the use of either arc, merely close switch controlling that lamp. Note : If operator will follow the above instructions carefully, he can heat up the carbons in the second lamp or burn in a new trim of carbons without disturbing the arc of the other lamp. The two arcs can be used simultaneously for dissolving the pictures. General Care Keep the machine clean. Keep the commutator clean (but do not use sand or emery paper on it) . If it becomes dirty, hold a pad of coarse canvas or cheese cloth against its surface while running, and when free of dirt wipe the surface with a clean cloth pad that is slightly moistened with pure vaseline. Do not permit the carbon brushes to become too short, as disastrous sparking will result. A new set of carbon brushes should be put in before the old ones are completely worn out. When putting in new brushes it is well to first put in two, one in each holder at opposite ends of the commutator, then as soon as they are worn into a perfect fit to the surface of the commutator, replace the remaining old brushes with new ones. The machine has ball bearings and they require a very small amount of lubrication. The three grease cups on the machine should each be given one turn twice each week. If this is done these grease cups will require refilling once each thirty to forty days.