. Building and repairing railways ... : Forming one of the series of the volumes comprised in the Revised and enlarged edition of The science of railways, . ver«0« imowti simr ciuip snuoM immsH imio etim Fig. 122, RIGID STEEL CLAMP FROG. clamps being made of steel. This is sometimescalled a yoked frog. Fig. 123 represents a frogriveted to a plate I to f inches thick, the rivetsbeing countersunk on the under side of the plateto give a flat bearing on the ties. In addition tothe styles of rigid frogs mentioned, some roadshave styles of their own, differing somewhat indetail, and the various make
. Building and repairing railways ... : Forming one of the series of the volumes comprised in the Revised and enlarged edition of The science of railways, . ver«0« imowti simr ciuip snuoM immsH imio etim Fig. 122, RIGID STEEL CLAMP FROG. clamps being made of steel. This is sometimescalled a yoked frog. Fig. 123 represents a frogriveted to a plate I to f inches thick, the rivetsbeing countersunk on the under side of the plateto give a flat bearing on the ties. In addition tothe styles of rigid frogs mentioned, some roadshave styles of their own, differing somewhat indetail, and the various makers also differ in thedetails of manufacture and style. Eigid frogs STANDARDS OF CONSTRUCTION. 255. SECTION A-B. Fig. 123. SElCTlDN C-D. RIGID PLATE RIVETED FROG. should not be used in main track of roads doinga large business; they may, however, be used onbranches and in yards to advantage to reduce theexpense of construction. Spring rail frogs have been called into use toprevent the pounding at the frog and secure asmooth riding main track; the spring rail frog isconsidered to have overcome the weak point inthe track caused by a frog of the rigid type. Fig.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1906
