File:The principles underlying radio communication (1922) (14571439908).jpg

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Description
English:

Identifier: principlesunderl00unit (find matches)
Title: The principles underlying radio communication
Year: 1922 (1920s)
Authors: United States. National Bureau of Standards Ould, Richard Sheldon, 1889- United States. Army. Signal Corps
Subjects: Telegraph, Wireless Radio
Publisher: Washington, Govt. Print. Off.
Contributing Library: Internet Archive
Digitizing Sponsor: Internet Archive

View Book Page: Book Viewer
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Text Appearing Before Image:
ConnecTions of mt^r -h^crxareitor- Toi conversion from DC- To C^.C-/V\ _ Motor drmdTure E.( - Motor -^lelcsl rheostAf (J _Cje.ncr,jror armdture. E2-Q«ef^^or field rhcoflTAl 5-fe —Motor sldkrTini boxOF— O«nerdtor -field windin> one shaft and the two frames are made into one structure,though openings are left for ventilation. These, as well asother openings at the ends of the machine, are screened to keepout foreign material, while permitting a free flow of air forcooling. The generator frame is cast in the form of a cy-lindrical shell. At each end is inserted a laminated armaturecore, with teeth projecting radially inward, on which the arma-ture winding is placed. Between the two armature cores is thefield winding, a single large coil which fits inside the cylindricalshell, where it is rigidly held in place. This coil produces a
Text Appearing After Image:
Fig. 124.—Inductor alternator type motor-generator set. Generator armature coils, firstrow. Generator armature coils, sec-ond row. Generator field coil. 4. Terminal box. 5. Inductor teeth. 6. Brass disks. 7. D. c. motor armature. 201 202 DYNAMO-ELECTRIC MACHINERY. magnetic flux parallel with the shaft. The armature windingis in two groups, one on each core. Each group consists of 12coils, and the coils are all connected in series. The portion of the set so far described is stationary. Therotor is a solid cylindrical core, at each end of which is a ringof 12 teeth projecting radially outward. The core is mag-netized by the stationary field winding previously mentioned.To trace the magnetic circuit, begin at the core. One end of itis N, the other /S. The flux passes out through all the rotorteeth at the iV end, across the air gaps, into the adjacent statorteeth, through the corresponding gap into the rotor teeth atthe /S* end, and thence into the central core again. As the rotoris mad

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https://www.flickr.com/photos/internetarchivebookimages/14571439908/

Author Internet Archive Book Images
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Flickr tags
InfoField
  • bookid:principlesunderl00unit
  • bookyear:1922
  • bookdecade:1920
  • bookcentury:1900
  • bookauthor:United_States__National_Bureau_of_Standards
  • bookauthor:Ould__Richard_Sheldon__1889_
  • bookauthor:United_States__Army__Signal_Corps
  • booksubject:Telegraph__Wireless
  • booksubject:Radio
  • bookpublisher:Washington__Govt__Print__Off_
  • bookcontributor:Internet_Archive
  • booksponsor:Internet_Archive
  • bookleafnumber:204
  • bookcollection:internetarchivebooks
  • bookcollection:americana
Flickr posted date
InfoField
27 July 2014

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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14571439908. It was reviewed on 5 August 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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