F. H. Richardson's bluebook of projection (1942)

Page scan 000394 from F. H. Richardson's bluebook of projection

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1942
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000394
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
July 11, 2024
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.

37H RICHARDSON'S BLUEBOOK OF PROJECTION that lamps vary more or less in constructional details they all perform the same functions and these drawings are a common guide to all lamps, including your own, no matter what its make is. Positive Carbon Contacts (71) The positive contact parts, A A in Fig. 151, are made exceptionally heavy in all high intensity lamps. They are made of the best heat resisting material known. )3.c m/m 01 a Fig. 150. — Upper illustration shows the correct carbon position. Lower left shows incorrect carbon position resulting in loss of light. Lower right shows incorrect carbon position resulting in a flickering of the arc. With proper care they will last from 300 to 400 hours. If, through carelessness or otherwise, these contact parts are badly burned and pitted (72) they should be discarded and a new pair put in. (73) To try to file them is futile. (74) If the contact parts are neither burned nor pitted, they may be cleaned. Remove the contact. Wrap a strip of crocus cloth, or lacking that a strip of No. 1 emery