AND KATKl oK rill'.ll; ATOMIC WKK niTS. 



41 



released by the motion of z, secure th(^ correct ceiiteiiug of tlie lower hooks h, Fig. 

 17. When these hitches are closed l)y turning z, the arm ^1 locks the shaft />', and 

 another arm at the end of the shaft z unlocks ^D. While/'/' is lowered, and the 



Fic;. iq. — Plan of reversing mechanism. 



hooks a and h are engaged, B and n cannot be turned, for the arm A is also locked 

 by turning w; when w has lifted//', z is unlocked, and can then in turn unlock B 

 and the latches x .f, after which B and ?n ii can be turned. 



