short-end wires for an appreciable footage, and secured at intervals with 

 soft-iron wire seizings. The entire length of the splice is served with 

 tarred spun yard, applied with serving mallets. 



A splicing tool is used for laying up the sheathing wires. It is a 

 steel plate in the form of two half-circles, each with a handle, with 

 notches in the rim. It opens in the middle so it can be set in position 

 across the cable. Once the sheathing wires are placed in their respective 

 notches, it is closed and fastened by a set screw. It is then worked 

 around by the handles in the direction of the lav forcing the sheathing 

 wires spirally around the cable in their proper order. The tool is 

 pushed along the cable as it is rotated. 



Sleeves 



Sleeves have been used in cable-jointing processes, both as load- 

 carrying devices in the armor and for the purpose of maintaining electri- 

 cal continuity in the conductor. In the latter case, the mating ends of 

 the conductor are thoroughly cleaned and then slipped into the opposite 

 ends of a carefully sized copper sleeve, which is then squeezed by a hand 

 crimping tool. Two or three crimps on each half of the sleeve are usually 

 sufficient to provide adequate contact and a grip on the conductor that 

 will carry the very small tensile load. After the conductor is sleeved 

 together, the joint is insulated by any of three methods described above. 



Sleeves used as load-carrying members are usually of stainless steel. 

 They are used principally for the central tensile-carrying steel strand 

 of the nonarmored-type cables. Generally, these sleeves are somewhat 

 heavier than the copper sleeves mentioned above, but the principle is 

 basically the same. 



The Simplex Wire and Cable Company experimented with steel sleeves 

 in nonarmored-type cables. They found a single 1-inch long crimp on a 

 7/16-inch O.D. sleeve over a 0.214-inch strand was able to carry a ten- 

 sile load of 4,200 pounds. These were tested to destruction; instead of 

 pullouts, the usual mode of destruction was the fracture of one or two 

 steel strands at the location immediately at the entrance to the sleeve. 

 This indicates the high friction grip developed in these sleeves. 



A method" for splicing caged armor coaxial cable (3-D multiplex array 

 cable) has been developed by Simplex Wire and Cable Company. The splice 

 requires two men, two and one-half working davs to complete. Briefly, it 

 consists of: 



1. Preparation of the work area 



2. Preparation of the cable ends 



3. Brazing the inner conductor 



4. Molding of 0. 18-inch-diameter insulation 



5. Brazing the return tapes 



6. Jointing the shielding tape 



7. Patching the belt 



8. Sleeving the armor wires 



9. Molding the armor bedding 

 10. Patching the outer jacket 



55 



