. Operation of trains and station work and telegraphy . FIG. 125. ABSOLUTESTAFF INSTRUMENTWITH View with Cover RemovedShowing Armature Dropped. FIG. 126. ABSOLUTE STAFF View with Cover Removed. STATION AND TRAIN WORK 405 pose each other and the armature being brought to thepoint of attraction is held there. With the staff out, ifan attempt be made to release another staff, the circuitclosed will be as shown on Plate 10, with the polarityof the current following through magnet K-88 comparing this circuit with the one shown on Plate 9for releasing a staf
. Operation of trains and station work and telegraphy . FIG. 125. ABSOLUTESTAFF INSTRUMENTWITH View with Cover RemovedShowing Armature Dropped. FIG. 126. ABSOLUTE STAFF View with Cover Removed. STATION AND TRAIN WORK 405 pose each other and the armature being brought to thepoint of attraction is held there. With the staff out, ifan attempt be made to release another staff, the circuitclosed will be as shown on Plate 10, with the polarityof the current following through magnet K-88 comparing this circuit with the one shown on Plate 9for releasing a staff, it will be seen that in the formerthe currents flowing through magnets K-360 and K-88oppose each other, and in the latter they do not, thus pre-venting the release of a second staff. On arrival of thetrain at Y the staff is delivered either by hand or de-livered to the operator who, having seen that the train iscomplete by observing the rear end markers, places thestaff in the opening (Figures 120 and 124-N) of his in-strument, having first turned
Size: 898px × 2783px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadtrains, booky
