104 



SUBMARINE CABLE LAYING AND REPAIEING. 



tanks in a factory, this view representing the tank house at the 

 works of Messrs. Siemens Bros. & Co., to whom the author 

 is indebted for the illustration. 



The deep-sea sheathing machine (Fig. 45) is arranged to 

 be driven from the shop shafting. This machine is capable of 

 sheathing cables with wires of 4mm. diameter (No. 7 B.W.G.), 

 and in ordinary working at 60 revs, per min. will cover from 

 four to five miles of cable per day of 10 hours, including 

 stoppages for replacing empty bobbins and jointing up wires. 

 The machine carries 24 bobbins (each capable of holding 



Fig. 50. — High Speed Closing Machine by Johnson & Phillips. 



3cwt. of wire) arranged in two sets of nine bobbins, and one 

 set of six. Messr?. Johnson and Phillips also make a machine 

 for the same number of sheathing wires but to run at twice the 

 speed — namely, 120 revs, per min. In this machine, illustrated 

 in Fig. 50, the 24 bobbins are arranged in four bays of six each 

 to reduce the diameter of the revolving frame. The bobbins 

 are 21 in. diameter and 11 in. wide. At normal speed the 

 machine will pat on tbe complete armouring and protective 

 yarns, tapes and compound at the rate of 8 miles per day of 12 

 hours, or nearly 60ft. per minute. All parts are designed to 



