ROPE 



57 



completed splice should appear like Figure 82. There are 

 two parts of strands ending at each of the points M, N, O, 

 P, R, and 5. 



BLOCKS AND TACKLE 



Block. A sheave or pulley or set of pulleys mounted 

 within a shell or frame to which, is fixed a hook, eye, or ring 

 at one end for attaching it to a fixed or moving object and 

 often a becket, consisting of an eye or some similar fasten- 

 ing, at the other end for attaching one end of the rope is 

 called a block. 



Tackle. A tackle is a mechanism of ropes, pulley-blocks, 

 hooks, etc:, for raising, lowering, and moving heavy objects. 

 Some of the common names applied to a tackle consisting 

 of two blocks and a rope are : 

 fall and tackle, set of falls, 

 set of blocks, and pair of 

 blocks. 



That ply of the rope of a 

 tackle to which the power is 

 applied is called the fall-rope. 



The block from which the 

 fall-rope passes is called the 

 fall-block. 



The block shown in Figure 



83 is a double block with a 

 becket. 



The lower block in Figure 



84 is a double block without 

 a becket. 



The fall-block in Figure 86 

 is a triple block without a 

 becket. 



The fall-block B in Figure 87 is a single block with 

 a becket. 



Fig. 83 



Fig. 84 



