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THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1957 



Company, were designed with the objective of making them act as much 

 Hke cable as possible.^ Despite this, their presence introduced a loading 

 and laying problem as their ability to bend without injury is limited to 

 about 3^ ft radius, and their structure is such that unnecessary bending 

 may involve a hazard to their water tightness. As the majority of the 

 sheaves and drimis of the conventional laying gear are considerably 

 smaller than 7 ft diameter, a number of modifications were required in 

 Monarch's equipment to satisfy the repeaters. 



For the most part, the new gear was designed by the Telegraph 

 Construction and Maintenance Co., Ltd., to broad requirements sup- 

 plied by the A.T.&T. Co. The modifications included providing the port 

 bow sheave with a flat tread to bring its diameter to 6' 10", and replac- 

 ing both forward dynamometers and the aft dynamometer by a new 

 design employing a 7-foot wheel in a pivoted "A" frame bearing on 

 Elliott pressure type load cells. Port and starboard forward drums were 

 replaced with the maximum diameter drums possible without a major 

 change in the complete gear. This diameter proved to be 6'10" on the 

 tread. The after paying out drum was replaced with one having a 7'0" 

 diameter. The forward port and aft cable drums were equipped with 



Fig. 8 — General view of modified after cable gear (one of 2 hold back sheaves, 

 drum with fleeting knife and ironing board, and, at extreme right, dynamometer 

 sheave). 



