INTERIOR OF LONDON BRIDGE SIGNAL BOX
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Description
Identifier: ourironroads00will Title: https://www.flickr.com/photos/internetarchivebookimages/tags/bookidourironroads00will">Our iron roads: their history, construction and administration Year: https://www.flickr.com/photos/internetarchivebookimages/tags/bookyear1883">1883 (https://www.flickr.com/photos/internetarchivebookimages/tags/bookdecade1880">1880s) Authors: https://www.flickr.com/photos/internetarchivebookimages/tags/bookauthorWilliams__Frederick_Smeeton__1829_1886">Williams, Frederick Smeeton, 1829-1886 Subjects: https://www.flickr.com/photos/internetarchivebookimages/tags/booksubjectRailroads____History">Railroads -- History https://www.flickr.com/photos/internetarchivebookimages/tags/booksubjectRailroads____Great_Britain">Railroads -- Great Britain Publisher: https://www.flickr.com/photos/internetarchivebookimages/tags/bookpublisherLondon___Bemrose___sons">London : Bemrose & sons Contributing Library: https://www.flickr.com/photos/internetarchivebookimages/tags/bookcontributorUniversity_of_California_Libraries">University of California Libraries Digitizing Sponsor: https://www.flickr.com/photos/internetarchivebookimages/tags/booksponsorMSN">MSN View Book Page: https://archive.org/stream/ourironroads00will/ourironroads00will#page/n305/mode/1up" rel="noreferrer nofollow">Book Viewer About This Book: https://archive.org/details/ourironroads00will" rel="noreferrer nofollow">Catalog Entry View All Images: https://www.flickr.com/photos/internetarchivebookimages/tags/bookidourironroads00will">All Images From Book Click here to https://archive.org/stream/ourironroads00will/ourironroads00will#page/n305/mode/1up" rel="noreferrer nofollow">view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: ainst possible movement, whileeach is at the same time subject to the control of all those whichare related to it. This result, complex and difficult as it seems, is achieved bymechanism of great simplicity and beauty. Immediately underthe floor of the platform, and just in front of the levers, arearranged several series of vibrating and sliding bars, somewhatlike the tumblers of a lock placed horizontally. These bars OTR IRON ROADS. na here which stand in front of certain levers as to their motion, or notches there which permit certain travel. Some of them have sloping faces such that, when a lever moves along them, it edges them to one side, and this transverse motion being communicated to others of the s brings the proper projections or notches in front of those levers to which the moving lever is related. Thus, by the ment of one lever, some others are stopped and some are left free, and this simple principle carefully applied to all, works them into a system incapable of discord. Text Appearing After Image: INTERIOR OF LONDON BRIDGE SIGNAL BOX. The locking apparatus of points and signals is not exceptedfrom the general law of degradation. But since the normalposition of all the signals indicates danger, if, through slacknessor wear, the lever which works a signal should become partlyinoperative, the worst that can happen is to leave the signal atdanger. So throughout the whole mechanism—let cranks orslides wear, rods stretch or break, delay may ensue, but dangernever. Let us now explain the system which guides the signalists intheir operations. At each end of the glass house a lad is seated, SEEING SIGNALS OUT OF SIGHT. 287 with note-book and pencil, in front of an electric telegraph. The apparatus on the right rings a bell, the lad looks atits index and immediately exclaims, North-Kent, CharingCross, or whatever else the needle may direct him to say. Anobserver looking along the bridge perceives the steam cloud ofa locomotive advancing, and presently catches the bright sheenof its ste 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. -
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Link: https://www.flickr.com/photos/126377022@N07/14573671499/
Resource type: Image
Added by: Simon Cotterill
Last modified: 3 years, 9 months ago
Viewed: 342 times
Picture Taken: 1883-01-01T00:00:00 -
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