Animated mechanical locking

Diagram
Lever 14 is pulled to clear disc signal 14, which will come off provided the detection on points 16B, 19 and 20 is made up. The locking here is more complicated - the locking on 14 is effected in channel 3 (bar 2 locks 16 reverse), channel 5 (bar 2 locks 18 reverse), channel 8 (the condition piece brings into effect the locking between 19 normal (bar 1) and 4 & 8 normal (bar 3) which only applies with 14 reverse) thus locking 4 & 8 normal. In channel 9 bar 1 locks 22 normal, 2 normal, 17 reverse and 29 normal with 19 reverse. This is expressed in the locking table as 14 locks 22.50.(2.29w19R) and 14 released by 16.18.(17.33w19R).

Click here to restore 14.