. Electric railway journal . 10090804- 70 S so c 50w 40 U<V ? 301 15 « l2 v 18 « !* !£ 10§ 9 M by chords of equal length measured on the two 50 , x r 2 R = If x is very small as compared with R, the secondterm in the above formula may be omitted. If it isexpressed in inches, R is approximately 600/x. The trolley wire can be made to follow closely itstheoretically correct curve by close spacing of thehangers, which is especially necessary on curves of. FIG. 8—DIAGRAM FOR USE IN LOCATING HANGERS short radius. Referring to Fig. 8, the distance d mustbe the same on both sides of the
. Electric railway journal . 10090804- 70 S so c 50w 40 U<V ? 301 15 « l2 v 18 « !* !£ 10§ 9 M by chords of equal length measured on the two 50 , x r 2 R = If x is very small as compared with R, the secondterm in the above formula may be omitted. If it isexpressed in inches, R is approximately 600/x. The trolley wire can be made to follow closely itstheoretically correct curve by close spacing of thehangers, which is especially necessary on curves of. FIG. 8—DIAGRAM FOR USE IN LOCATING HANGERS short radius. Referring to Fig. 8, the distance d mustbe the same on both sides of the theoretical curve ofthe wire and should not exceed a predetermined maxi-mum. Its value4 depends on H, the hanger spacing,and upon S, the radius of the correct curve for the wireat the point where the hanger is being placed, assumingan arc of a circle between hangers. The length h from the hanger to the point P, wherethe trolley crosses its theoretically correct position, canbe calculated but it is found to have an approximaterelation to the distance between hangers, viz.,H = X h- This relation is plotted for various ies h = \i(lS — \2dS- d- Radius,in Feef, at Hanger, of Correc+Curve for Trolley 1614 \Z 10 9 8 7 Distance in Feet from richer fo Point whereTrolley Crosses its Theoretically CorrectPosition
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
