File:Electrical instruments and telephones of the U.S. Signal corps (1911) (14754214864).jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(2,898 × 1,744 pixels, file size: 1.05 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]



Description
English:

Identifier: electricalinstru00unitrich (find matches)
Title: Electrical instruments and telephones of the U.S. Signal corps
Year: 1911 (1910s)
Authors: United States. Army. Signal Corps
Subjects: Military telegraph -- United States Military telephone -- United States
Publisher: Washington, Govt. print. off.
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
^ equipment that will be furnished for telephoneinstallation with the oO-line switchboard will consist of two setsof 3-ampere normal charge rate batteries. Where direct current ofnot less than 40 volts and not more than 220 is available, these cellswill be charged through lami)s by means of the charging panel,figure 18, shown in Chapter II. Where only alternating current is available a special motor gen-erator and ))anel will be provided. The motor side will be built tomeet the characteristics of the i:)Ower circuit, and to that end a requi-sition for this machine should always state the voltage, number ofphases, and frequency of the alternating power current available. ELECTRICAL INSTRUMENTS U. S. SIGNAL CORPS. 179
Text Appearing After Image:
180 ELECTRICAL INSTRUMENTS U. S. SIGNAL CORPS. Figure 108 illustrates an ideal installation of the central officeai)paratus where direct current is available. A detail drawing of thecharging j)anel shown is given in figure 18, chapter TI. These i^anels are intended for installation at about 18 inches fromthe wall, as indicated on the figures. The leads from the switch-jjoards and the post power should be brought up from the floor inloricated conduit fastened to the wall, e\en with the bottom of thepanel; from this point the lead sheath is removed and the wires arecarried over to the connecting lugs on the rear of panel. Theexposed parts of the leads should be painted thoroughly with pre-servative i)aint. If the storage battery cabinet is near by the leads, itcan be carried directly co it; but if any considerable distance separatesthese apparatus their battery leads should be lead down to the floorand then to the battery cabinet in the same manner as to the panel.

Note About Images

Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
Date
Source

https://www.flickr.com/photos/internetarchivebookimages/14754214864/

Author Internet Archive Book Images
Permission
(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Flickr tags
InfoField
  • bookid:electricalinstru00unitrich
  • bookyear:1911
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:United_States__Army__Signal_Corps
  • booksubject:Military_telegraph____United_States
  • booksubject:Military_telephone____United_States
  • bookpublisher:Washington__Govt__print__off_
  • bookcontributor:University_of_California_Libraries
  • booksponsor:MSN
  • bookleafnumber:182
  • bookcollection:cdl
  • bookcollection:americana
Flickr posted date
InfoField
27 July 2014

Licensing

[edit]
This image was taken from Flickr's The Commons. The uploading organization may have various reasons for determining that no known copyright restrictions exist, such as:
  1. The copyright is in the public domain because it has expired;
  2. The copyright was injected into the public domain for other reasons, such as failure to adhere to required formalities or conditions;
  3. The institution owns the copyright but is not interested in exercising control; or
  4. The institution has legal rights sufficient to authorize others to use the work without restrictions.

More information can be found at https://flickr.com/commons/usage/.

Please add additional copyright tags to this image if more specific information about copyright status can be determined. See Commons:Licensing for more information.
This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14754214864. It was reviewed on 18 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

18 September 2015

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current12:01, 18 September 2015Thumbnail for version as of 12:01, 18 September 20152,898 × 1,744 (1.05 MB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 270°
06:16, 18 September 2015Thumbnail for version as of 06:16, 18 September 20151,752 × 2,898 (1.06 MB)Fæ (talk | contribs)== {{int:filedesc}} == {{subst:chc}} {{information |description={{en|1=<br> '''Identifier''': electricalinstru00unitrich ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Felectricali...

You cannot overwrite this file.

There are no pages that use this file.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Electrical_instruments_and_telephones_of_the_U.S._Signal_corps_(1911)_(14754214864).jpg&oldid=896106536"