202 



TESTING OF FIHKOUS ROPES. 



this form of fastening has been used satisfactorily for both 

 fibrous and wire ropes.* 



An effective method of holding is obtained by the use 

 of a conical socket similar to the one used for wire ropes. 

 One of these is shown on Fig. 129. The end of the rope 

 must be provided with an enlarged end, either by forming 

 a " turk's head " upon it, or by unravelling the portion near 

 the end and knotting the various yarns together. This 

 is shown at A. The space between this enlargement and 

 the body of the rope may be filled in by a wrapping of 

 rope yarn, as at B. If this form of holder is carefully 

 made it will be found that failure will take place in the 

 body of the rope. 



FIG. 128. Kortum's Rope 

 Shackle. 



FIG. 129. Rope Socket. 



It has been found that if a number of specimens of 

 varying length are taken from the same piece of rope, and 

 tested, that the shorter ones yield the higher results ; this 

 point should be borne in mind when selecting lengths for 

 test pieces. The length of the fibre, which is from 2i ft. 

 to 3| ft. in length in a hemp rope, has probably some 

 influence on the difference of strength on long and short 

 pieces. 



* Unwin, ''Testing," p. 184. 



