. Electric railway journal . Catenary Lines After Test—Section of Line with BrokenSteady Strain forms with sister-hook tops. These sister-hooks are lockedon the messenger by two small clinching points. This rigidconnection to the messenger wire has proved undesirablefor the reasons already noted in referring to the other rigidhangers. The design was also heavier than necessary. Hanger No. 9 is of i-in. x J^-in. strap which is fastenedto the messenger cable by a loop of flat stock, a bolt passingthrough the two loops and the upper end of the strap. Con-sequently this hanger grips the messenger
. Electric railway journal . Catenary Lines After Test—Section of Line with BrokenSteady Strain forms with sister-hook tops. These sister-hooks are lockedon the messenger by two small clinching points. This rigidconnection to the messenger wire has proved undesirablefor the reasons already noted in referring to the other rigidhangers. The design was also heavier than necessary. Hanger No. 9 is of i-in. x J^-in. strap which is fastenedto the messenger cable by a loop of flat stock, a bolt passingthrough the two loops and the upper end of the strap. Con-sequently this hanger grips the messenger and has alsogiven trouble from bending on account of its strap con-. Catenary Lines After Test—Section of Line with Bent andLoosened Hangers struction. It is used with ear No. 8, previously described. Hanger No. 10, which is used with the toggle-clamp earNo. 7, previously described, is a rigid form of rod messenger clamp consists of a malleable-iron hookwhich is screwed to the end of the hanger rod. A groovedhollow casting inside the base of this hook is forced to holdthe messenger firmly against the top of the hook. Thishanger has given no particular trouble except thatdue to its rigid grip on the messenger wire. The principalfault is the weak construction at the place where the hingedpin goes through the lower end of the suspension speaking, this hanger is not considered heavyenough for No. 0000 wire. CURVE PULL-OFF AND ANCHOR CONSTRUCTION The most satisfactory curve and anchorage constructionis used on a section with a 4-deg. curve. The pull-offhangers consist of a sister-hook-rod-top hanger double-gripscrew curve ear and
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
