Bell telephone magazine (1922) (14568646897)

Identifier: belltelephonemag00vol2930amerrich (find matches)

Title: Bell telephone magazine

Year: 1922 (1920s)

Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept

Subjects: Telephone

Publisher: (New York, American Telephone and Telegraph Co., etc.)

Contributing Library: Prelinger Library

Digitizing Sponsor: Internet Archive

Text Appearing Before Image:

in the Straits, thefirst operation by the ship was tosurvey and mark the course of thecables with lighted buoys, spacedfrom 12 to 15 miles apart, to actas guides during the actual cable lay-ing. This operation was especially difficult because of the circuitousroutes, the tricky and variable cur-rents of the Gulf Stream, sometimesreaching four or five knots, and thegreat depth in many locations. Eachbuoys position was determined, thebuoy was placed, and its positionwas rechecked shortly thereafterwhile the ship was in the immediatevicinity. Later the buoy was againvisited and checked at least once be-fore being finally used as a locationmarker. The ships automatic depth-measuring equipment was alsochecked at each buoy location by ameasured sounding wire. Some ofthe buoys carried oddly-shaped metaltargets, to be located by the shipsradar equipment when the buoyswere out of direct sight. The preliminaries were now com-plete, all gear was checked, and itwas time to lay the deep-sea cable

Text Appearing After Image:

A section of one of the cables into which a repeater has been spliced goes over the bow ofthe Lord Kelvin, with the rope taking part of the strain. The captain of the ship,in light shorts, watches the operation no Bell Telephone Magazine SUMMER with its integral repeaters. Sincethe ship could maneuver close intoHavana, that end of each cable waspulled from the ship by a winch onshore, the cable being floated intoposition with the aid of empty oildrums. When the Havana end wassecured at the landing and the floatswere removed, the cable ship couldthen start northward paying out thelong section at a maximum speed ofabout five knots. When the repeat-ers were reached, this speed was re-duced and careful watch was keptas they, like the rest of the cable,went out around the braking drumsand over the large bow sheave ofthe Kelvin. In laying submarine cable, it is im-

bell telephone magazine 1950 book illustrations telephone bell telephone company american telephone and telegraph company history of technology oceans marine life images from internet archive

1922

Prelinger Library

http://commons.wikimedia.org/

public domain