BOLTING VOICES TOGETHER
Η
A-djusting casing over splice in polyethylene cable. Edges and ends are sealed with a new Butyl rubber compound that won't harden, dry o u t or lose adhesion even in extreme heat or cold.
More than ever, light, flexible polyethylene sheathed cable developed by Bell Telephone Laboratories is providing speedy answers to the demand for more telephone service. But at thousands of splices, the sheath must be thoroughly sealed against moisture. Laboratories engineers developed a protective casing which is quickly and simply bolted in place. The edges and ends of the casing are permanently sealed with a new compound developed by Laboratories rubber chemists. Now, economical polyethylene cable can be installed much faster and at lower cost. Here is another example of how Bell Laboratories continually finds ways to keep telephone service high in quality, while the cost stays low.
BELL
TELEPHONE
LABORATORIES
C L O S E D CASING I N PLACE
^ A
E X P L O R I N G A N D I N V E N T I N G , D E V I S I N G A N D PERFECTING, F O R C O N T I N U E D I IMPROVEMENTS A N D E C O N O M I E S IN T E L E P H O N E SERVICE
VOLUME
3 2,
NO.
9
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*
*
»
MARCH
1,
1954
799
