File:The Street railway journal (1907) (14738465936).jpg

Identifier: streetrailwayjo291907newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
diameter. It is suspendedfrom the main carrier wire, d, at intervals of 6 m (20 ft.).This suspension is made through perpendicular hanger wires, e, which are con-nected with the main mes-senger cable as well as theauxiliary carrier wire by thespecial clamps illustrated inthe right engraving in Fig.4. In the middle of thespan a different type ofclamp, g, is used as shownin detail in the upper leftpart of Fig. 4. The main messenger cableconsists of seven strands ofsteel wire, giving a totalsection of 35 sq. mm, or thatof about a No. 3 wire. Asillustrated in Figs, i and 2,it is carried alf the poles onan insulator, h, with a metalcap to which the hangerwire is screwed (see Fig.6). To prevent the sideswinging of the trolley wire,the latter as well as the aux-iliary carrier are secured bya double pull-off, i, of thetype shown in Fig. 7, apiece of tubing, k, andclamp, /. The latter is soconstructed that even atthese points the trolley wirecan rise with the bow press-ure. At curves this ar-
Text Appearing After Image:
FIG. 2.—END AND SIDE ELEVATIONS OF MULTIPLE CATENARY (ALL DIMENSIONS IN MILLIMETERS) It will be noted from Fig. i that in this case it is used withside poles and double track. The details of this type ofcatenary are indicated in Fig. 2. The trolley, a, is a hardcopper wire of loo-sq.-mm section (No. 000) supported atintervals of 3 m (10 ft.) with mechanical clips, b (shownin detail in Fig. 3), which are fastened to an auxiliarycarrier wire, c, placed above the trolley wire and practicallyparallel to it. The clips grip the trolley wire but have alongitudinal movement along the auxiliary carrier wire. rangement is somewhat modified, as the wires are undertension only. Means are provided at definite intervals onall three wires to allow for the effect of changes in temper-ature. The advantages claimed for the multiple catenary over thesingle catenary are as follows : The number of perpendicularsupporting wires is only half of what it would otherwisebe, affording considerable improvement

Note About Images