H - Electricity – 02 – G
Patent
H - Electricity
02
G
H02G 3/38 (2006.01) G02B 6/44 (2006.01) G02B 6/52 (2006.01) H02G 1/08 (2006.01)
Patent
CA 2307150
In order to install an optical fibre cable 110 in a duct 112 a plurality of vents 130, 132, 134 spaced apart along the duct are operated such that during blowing any vent 130 upstream of the leading end 138 of the cable is closed and when there is at least one vent 132, 134 downstream of the cable leading end at least the downstream vent 132 closest to the cable leading end is open for venting gas from the duct. In this way the pressure decay and pressure gradient profiles are modified during installation to improve installation performance.
Davies Martin Vincent
Lamb John Garth
Lang Ian Dewi
Sutehall Ralph
Kirby Eades Gale Baker
Pirelli General Plc
Prysmian Cables & Systems Limited
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