. Locomotive engineering : a practical journal of railway motive power and rolling stock . thdraw-ing the lock pin from lock bar, leaving the F.^elNT.-lOlNT ].t)CK. possible to reverse other levers which de-pend for .safety on the fact that the switchis properlj set and locked. Any plant can-not be considered safe where the switch-and-lock movement is such a distance fromthe tower that it would be possible toreverse and latch the lever, owing to thespring in the connections when the lockpin had not entered the lock bar, as wouldbe the case if something should get in be-tween the points of the

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. Locomotive engineering : a practical journal of railway motive power and rolling stock . thdraw-ing the lock pin from lock bar, leaving the F.^elNT.-lOlNT ].t)CK. possible to reverse other levers which de-pend for .safety on the fact that the switchis properlj set and locked. Any plant can-not be considered safe where the switch-and-lock movement is such a distance fromthe tower that it would be possible toreverse and latch the lever, owing to thespring in the connections when the lockpin had not entered the lock bar, as wouldbe the case if something should get in be-tween the points of the switch and preventit from closing. If a bolt lock was put in the connectionto the signal, it would be impossible to clearthe signal if the switch was not properlyclosed ; but as it is not practicable to puta lock on the signal for every switch whichthe signal may be used to govern, depend-ence must be placed upon the switch beingclosed properly when the lever is pulledover. No definite distance can be laid dowubeyond which it would be unsafe to go, asthe number of cranks and anv curves. OUT.SIDE-CONNECTED F.CINC.-PoiNT LoCK.