. The elements of railroad engineering . y jolt to the car, injurious to the rolling stock and caus-ing much discomfort to passengers. Stub switches aremore liable to misplacement than split switches, and there isthe constantly recurring need of recutting the ends of therails at the head-block, to provide for expansion and for theremoval of battered ends. 1685. The Stub Switch.—The essential parts of astub switch are shown at A in Fig. 530. The rails a b andc d are the switch rails placed for the turnout position when placed for the main track is indicatedby dotted lines at c and/!
. The elements of railroad engineering . y jolt to the car, injurious to the rolling stock and caus-ing much discomfort to passengers. Stub switches aremore liable to misplacement than split switches, and there isthe constantly recurring need of recutting the ends of therails at the head-block, to provide for expansion and for theremoval of battered ends. 1685. The Stub Switch.—The essential parts of astub switch are shown at A in Fig. 530. The rails a b andc d are the switch rails placed for the turnout position when placed for the main track is indicatedby dotted lines at c and/! The switch rails are commonlyused in lengths of 30 feet, the standard rail length, of whichonly 22 feet are free to move or slide, the remaining 8 feetbeing spiked to the ties, as shown in the figure. The mov-ing portions of the switch rails are held in place by rods g^ //,k, and /, called s-witch rods. These rods keep the switchrails at proper gauge, and serve the purpose of track spikes. 1112 TRACK WORK. ki rz: ^^^ ! 65 A\ ? —a ^. TRACK WORK. Ill3 The first switch rod g is called the head rod. It extendsoutside the rails, and by means of the connection rod ;//,it is attached to the lever n of the switch stand, by meansof which the switch rails are moved from their connectionwith the main track rails o and />, to a connection with theturnout rails q and r. This movement of the switch rails istermed throwing the switch. The switch stand, and connection and head rods of thisswitch are shown in detail at B. The switch stand D con-sists of a cast-iron plate s to which is cast a semicircularlug /. A hole in this lug receives a pin, which is attachedto the end of the lever ;/. The connection rod ;// is attachedto the lever by means of the pin w, and is held in place by anut. The lever handle is slotted, and when the switch isset for either track, the slot fits over a staple v, projectingabove the lever far enough to receive a padlock tv whichlocks the switch. The switch rods
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
