Models 5E, 5F, 5G & 5H Electric Switch Machines: Single ... - Alstom

Theory of Operation2.5.5. Lock RodThe Lock Rod, when released by the cam bar lock dog, follows the movement of theswitch points and locks the switch points in the near of far positions. Two lock rod arms(clips) are used on the Model 5E - 5H switch machines (Figures 2–20 and 2–21).LOCK ROD ARM(CLIP). ONE BOLTEDTO EACH LOCK ROD.LOCK RODSPOINT DETECTOREND OF MACHINEFigure 2-20. New Style Lock Rod Arm (Two Required Per Machine)OLD STYLE LOCK RODARM (CLIP). ONE BOLTEDTO EACH LOCK ROD.LOCK RODSPOINT DETECTOREND OF MACHINEFigure 2-21. Old Style Lock Rod Arm (Two Required Per Machine)WARNINGTO PROVIDE PROTECTION AGAINST FALSE POINT-DETECTORINDICATIONS BECAUSE OF BROKEN DETECTOR ROD OR BROKENLOCK ROD CONNECTIONS, INSTALL THE ARMS ON THE LOCKRODS. IT IS ALSO IMPERATIVE THAT THOSE ARMS FURNISHEDBEFORE 1967 BE INSTALLED ON THE LOCK RODS SO THE HIGHSIDE OF THE ARM IS UNDER THE CONTACT YOKE, AWAY FROMTHE MOTOR END OF THE SWITCH MACHINE.P1293, Rev. Jun/07 2–21 Alstom Signaling Inc.