File:Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892) (14789659123).jpg

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Identifier: modernmechanisme00benj (find matches)
Title: Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics
Year: 1892 (1890s)
Authors: Benjamin, Park, 1849-1922
Subjects: Mechanical engineering
Publisher: New York, D. Appleton
Contributing Library: Mugar Memorial Library, Boston University
Digitizing Sponsor: Boston University

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Text Appearing Before Image:
Fig. 9T.—Field-inaguet. 24U DYIfAMO-ELECTRIC MACHINES.
Text Appearing After Image:
Fifj. IC,.F108. StH-10:i. \\isLiiij;li<)usc altiTiialiii^jcnrrfrit arc-linht dynamo. DYNAMO-ELECTRIC MACHINES. 241 in the line is generally followed by the cessation of current in the armature when a series-machine is employed; but in this system a break in the external circuit causes the generationof a heavy current in the armature, which, if not prevented, would eventually cause itsdestruction. To avoid this, the apparatus shown is employed, and its function is to short-circuit the armature. By this means the counter-electromotive force generated in the arma-ture is such as to cut down the lieavy current to the normal strength, so that no dangerousheating of the armature-coils can take place, The apparatus is so constructed that an excessof electromotive force generated in the armature, such as would be caused by a break in theline, causes a spark to pass between two points ; this allows sufficient current tq pass to ener-gize the solenoid, which pulls up its core and makes conta

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https://www.flickr.com/photos/internetarchivebookimages/14789659123/

Author Benjamin, Park, 1849-1922
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Flickr tags
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  • bookid:modernmechanisme00benj
  • bookyear:1892
  • bookdecade:1890
  • bookcentury:1800
  • bookauthor:Benjamin__Park__1849_1922
  • booksubject:Mechanical_engineering
  • bookpublisher:New_York__D__Appleton
  • bookcontributor:Mugar_Memorial_Library__Boston_University
  • booksponsor:Boston_University
  • bookleafnumber:259
  • bookcollection:mugar
  • bookcollection:blc
  • bookcollection:americana
Flickr posted date
InfoField
28 July 2014



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