Title: Method and apparatus for eliminating air flow in communications cables to assist in plug formation

Abstract: A compressed gas system including a source of gas under pressure and a pair of delivery lines communicated at one pair of corresponding inlet ends with the source and provided with structure at the other pair of discharge ends for sealed attachment with fittings opening into a communication cable at points spaced therealong on opposite sides of a predetermined location in the cable in which a poured plug is to be formed is provided. A bypass line equipped with a double T bypass valve is connected in parallel between the delivery lines and a gas flow line equipped with an in-line gas flow indicator is also connected in parallel between the delivery lines. The gas flow line is provided with a shut-off valve and each of the delivery lines is equipped with a gas flow control valve and a gas pressure gauge downstream from the associated gas flow control valve.

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Inventors: Viramontes, Javier R.

Application Number: 471131
Filing Date: 1974-05-17
Publication_date: 1976-05-25
Assignee:
Primary Class(es): 138/97 137/13, 138/89
Other Classes:
US Patent Ref:

2043227	Jun, 1936	Bennett	174/11.
2272734	Feb, 1942	Witt	138/94.
2276443	Mar, 1942	Wilson	138/89.
2320506	Jun, 1943	Bennett et al.	138/89.
2449271	Sep, 1948	Bennett et al.	174/11.
2510513	Jun, 1950	Mueller et al.	138/97.
3115163	Dec, 1963	Epps et al.	138/94.
3298398	Jan, 1967	Smith	138/94.
3310615	Mar, 1967	Bender	138/89.
3340336	Sep, 1967	Bender	138/89.
3472285	Oct, 1969	Ginsburgh et al.	138/97.
3789883	Feb, 1974	De Gregory	137/824.
3845789	Nov, 1974	Rohrer	138/97.

Other Refs:
Primary Examiner: Aegerter, Richard E.
Assistant Examiner: Bryant, III, James E.
Attorney: O'Brien; Clarence A., Jacobson; Harvey B.