Scully, Scott, Murphy & Presser
Submarine repeater structure
 Disclosed is a submarine repeater structure which has: a cylindrical pressure-tight case in which an electronic circuit is accommodated and sealed; a connecting ring for connecting a terminal portion of a submarine cable; an ocean observation instrument for detecting a variation of frequency difference between a pressure-sensitive crystal and a reference crystal to measure a pressure; and a case for accommodating and sealing the ocean observation instrument; wherein the accommodating and sealing case is attached to an end portion inside the connecting ring. 
NEC Corporation
H G
H02G G02B
inventional inventional
Osamu
Watanabe