WIRE-ROPE FASTENINGS. 



385 



Figs. 339, 340 show the ordinary splice and thimble, and Fig. 

 341 a block with a conical hole, in which the rope is secured by 

 fraying out the wires at the end to conform in shape with the 

 conical form of the aperture, the interstices between the wires 

 being filled up with spikes or nails driven in as tightly as 

 possible, and the whole consolidated with Babbitt metal. This 

 form of fastening, although neater, does not possess the strength 

 of the splice and thimble, and in the experiments was pulled out 

 under a load varying from \ to f of the breaking load. 



A 1 J-inch clear rope, with a thimble and splice 18 inches long 



Fio. 311. 



FIG. 339. 



FIG. 340. 



at one end, and a loop-socket at the other, pulled out of the 

 latter at 129,320 Ibs. 



A sample of the same rope, with thimbles and splices at 

 both ends, failed, when tested, by five strands breaking at 

 one end, and the other being pulled out with a tension of 

 142,800 Ibs. 



A cast-steel rope, 2 inches in diameter, fitted with loop- 

 sockets, failed by being pulled out at one end by a strain of 

 228,400 Ibs. ; about 20 of the wires parted in the socket. 



Puddling, 1 Clays well suited for puddle are opaque and not 

 crystallized ; they exhibit a dull earthy fracture, exhales, when 

 breathed upon, a peculiar faint smell termed argillaceous, are 

 unctuous to the touch, free from all gritty matter, and form a 



1 MPJ.C.E., vol. xeiv. p. 231. 



2 C 



