296 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1955 



cables on the main crossing in one summer. As noted, one of these 

 cables was laid during the summer of 1955 and the reverse-direction 

 cable will be laid during the summer of 1956. 



The essential parts of conventional paying-out, or picking-up, ma- 

 chinery are shown in figure 9. Although the flexible, built-in repeaters 

 are designed to be handled as part of the cable, it is, of course, desir- 

 able not to bend them to a small radius. New cable drums of approx- 

 imately 7-foot diameter have been fitted on the Monarch. Bow and 

 stern cable sheaves have also been made this diameter. Various other 

 minor structural changes, some based on successful laying of the Key 



A CABLE TANK (ONE OF FOUR) 



B CRINOLINE 



C JOCKEY GEAR 



PAYING OUT DRUM (ELECTRIC DRIVE) 



E DYNAMOMETER 

 F STERN SHEAVE 

 6 CRINOLINE BLOCK AND TACKLE 



ALL CABLE GEAR HAS A MINIMUM RADIUS OF 3FT 5lN, 



Figure 9. — Cabie-laying machinery, H. M. T. S. Monarch. 



West-Havana cable, have been made in the cable-laying machinery to 

 ease the passage of the repeaters from the hold over the sheaves. New 

 dynamometers for measuring and recording the cable-laying stresses 

 have also been provided and these enable the tension on the cable to be 

 closely controlled as it is i^aid out. 



The laying of the cable between NeAvfoundland and Nova Scotia 

 presents no special problems, but an electrically driven hoist has been 

 fitted over the ship's bows to facilitate handling the rigid tank-type 

 repeaters. 



CONCLUSION AND SPECULATION 



Barring unforeseen and unexpected delays, the latter part of 1956 

 should see the completion of the first transatlantic telephone connec- 



