THE LAYING OF SUBMARINE CABIiES. 



149 



The rings are also used for making buoys fast to deck by chains, 

 as seen in illustration. The buoy is picked up by the top cross 

 rope, and the chains on buoy are convenient for hanging on to 

 or attaching the bridle chain. 



The dynamometer is similar in action to those already de- 

 scribed, but has the external appearance shown (Fig. 71). The 

 framework forming the crosshead guides for the sheaves is built 

 of iron plates, riveted together in the shape indicated, and for 

 convenience in keeping cable at a certain height this frame- 

 ■workjStands about 16ft. high, and the sheaves on either side 

 are mounted on high A frames to correspond. 



Fig. 71. -Forward Dyuamometer on the " Faraday." 



The mounting of the bow and stern sheaves is specially 

 designed to eliminate all side friction between the cable 

 and cheeks of sheaves when the strain comes on sideways. 

 The bow sheave (illustrated in Fig. 72) is mounted on a 

 framework in bearings capable of turning sideways about 

 a horizontal axis, so that in picking up or paying out, if 

 the ship's course, owing to currents or weather, is not exactly 

 in the same line as the cable, the sheave takes up at once 



