File:A report on the alternating current, single phase, interurban railway line between Bloomington and Peoria (1909) (14573616200).jpg

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English:

Identifier: reportonalternat00rich (find matches)
Title: A report on the alternating current, single phase, interurban railway line between Bloomington and Peoria
Year: 1909 (1900s)
Authors: Richards, Percy McClure
Subjects: Street-railroads Railroads Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Thesemaphore No.2 is adjusted so that it is very slow acting, requir-ing the trains to run very slowly through the block in orderthat it will have time to clear. In this installation the odd numbered boards, governingthe traffic up the hill, normally stand at the safety positionwhile the even numbered ones stand at the danger. The reasonfor the latter is to prevent a down g^ade car entering an occupiedblock in case the semiphore fails to act. The operation of the odd numbered boards needs no expla-nation; they come to the danger position when there is a carmoving in either direction within the block. The odd numberedboards,being normally at the danger position, must clear beforea car$ may enter the block. This is accomplished by having aninsulated section of the track 1,400 feet in front of the board,arranged so that the wheels of a car within this 1,400 feet willshut the mechanism and cause the board to clear, if the blockis not occupied. Before the board at the east end of any block
Text Appearing After Image:
Figure 6LSlock Signal Semaphore

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https://www.flickr.com/photos/internetarchivebookimages/14573616200/

Author Richards, Percy McClure
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Flickr tags
InfoField
  • bookid:reportonalternat00rich
  • bookyear:1909
  • bookdecade:1900
  • bookcentury:1900
  • bookauthor:Richards__Percy_McClure
  • booksubject:Street_railroads
  • booksubject:Railroads
  • booksubject:Theses
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:38
  • bookcollection:university_of_illinois_urbana-champaign
  • bookcollection:americana
Flickr posted date
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27 July 2014
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current06:06, 17 October 2015Thumbnail for version as of 06:06, 17 October 20152,216 × 2,913 (293 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Identifier''': reportonalternat00rich ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Freportonalternat00rich%2F fin...

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