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File:Cyclopedia of applied electricity - a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric (14593689377).jpg

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Description
English:

Identifier: cyclopediaofappl05amer (find matches)
Title: Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc.
Year: 1916 (1910s)
Authors: American Technical Society
Subjects: Electric engineering
Publisher: Chicago : American Technical Society
Contributing Library: Northeastern University, Snell Library
Digitizing Sponsor: Northeastern University, Snell Library

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About This Book: Catalog Entry
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Text Appearing Before Image:
TFA/N e4LONG c 4 -^ ■ CffOSBY CI/F3 GAL VAN/Z£D d 6 T/-f.N/Sie3 rOF J^s W/F£ e e FOL£ BANDS r 60/t GALVAN/Z£D /ffON STFAND£D i^/F£^s ADD FOff STFADY STHAIN Q / 5F£C/AL TROLLEY £Aff /? 4 ^ CffOSB r CL JF5 GAL VAN/ZED / 6 TH/r^BL£S rOff -fi W/f?£ eon 4iGALVAN/Z£D /FO/V UV/F£ STFANDED b 4 iA^OOD STFA/N e^lONG e e FOL£ BANDS D//^rrv3/ON5 A AND B. TO DEPEND ON LENGT/ior SFAN. y^ TO BE NOT L£SS TNy^N /FT.y^ND B NOT N70ffE THAN 4FT. NTAX/T^U/V. Fig. 198. Span Construction of the Catenary Type Catenary Construction. The ordinary span wire and bracketconstruction already described supports the wire at points 100 feetmore or less apart and between the points of support, the wire sags 307 210 ELECTRIC RAILWAYS considerably. This is very objectionable in high speed work as thetrolley wheel strikes the wire a hard blow at each point of support.With the pantograph trolley used in alternating-current roads, itwould be practically impossible to operate with the ordinary con-struction.
Text Appearing After Image:
Fig. 199. Catenary System on Taght Brace Construction The catenary trolley-wire support has been developed to over-come this difficulty. As mentioned briefly before this system com-.prises a steel messenger wire securely mounted on insulators. Fromthe messenger wire, the trolley wire hangs by hangers located atintervals along the messenger wire. There may be any number ofthese hangers for each span of the messenger wire giving 3-pointsuspension, 5-point suspension, etc. By using hangers of differentlengths a trolley wire may be perfectly straight. 30S

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  • bookid:cyclopediaofappl05amer
  • bookyear:1916
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:American_Technical_Society
  • booksubject:Electric_engineering
  • bookpublisher:Chicago___American_Technical_Society
  • bookcontributor:Northeastern_University__Snell_Library
  • booksponsor:Northeastern_University__Snell_Library
  • bookleafnumber:351
  • bookcollection:northeastern
  • bookcollection:blc
  • bookcollection:americana
Flickr posted date
InfoField
29 July 2014

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