Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine (1914)

Record Details:

Title:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Date:
1914
Author:
Gage, Simon Henry, 1851-1944
Publisher:
Ithaca, N.Y. : Comstock Publishing Company
Volume:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Leaf #:
000532
Language:
English
Subjects:
Lantern projection, Motion picture projection
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Bibliography: p. 693-703
Date Added:
July 19, 2022
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.

CH. XIII] SWITCHES, FUSES, CIRCUIT BREAKERS 517 advantageous to enclose the switch in a metal box with a slit allowing the handle to project and move so that the switch can be opened and closed. As only the handle is exposed with this arrangment the operator is safe when manipulating the switch in the dark (fig. 278). See also § 714. § 713. End of the switch to connect with the supply wires. — Sometimes the supply wires are connected with the hinge end of the switch as in fig. 2. This has the disadvantage that the switch is then energized up to the break at the handle, when the main supply is on. As the switch is liable to get out of order and need screwing up occasionally it is better to insert the lead wires in the opposite or FIG. 278. ENCLOSED SWITCH IN A HORIZONTAL POSITION. Commencing at the right: L W Supply or line wires from the outlet box (fig. 270) to the table switch. k Key for locking the metal cover when it is closed. H Handle of the knife switch. It projects through the slot (s) in the cover. In the position shown the switch is open. sb Switch box. This is a sheet iron box enclosing the switch so that nothing can come in contact with the naked metal of the switch. Only the switch handle projects beyond the box. The enclosing box is represented as transparent in order to show the switch and its connecting wires within. The bottom of the enclosing box is covered with asbestos board and the switch base rests on the asbestos, not on the metal of the box. hg Hinge of the metal cover. By turning the cover over to the left the entire switch is exposed. A W Wires from the switch to the arc lamp.