Pressure equalizing accessory installable along the top side of electrical cables

Claim 1

A cable pressure equalizing accessory for installation along the upper side of a horizontally supported cable, said accessory comprising: a threaded tubular fitting anchorable in an upright position in an opening through the upper side of a cable sheath, a T-shaped member having a threaded through bore axially of its T-stem and detachably mounted on the upper end of said tubular fitting, the ends of the T-head of said T-shaped member being concentric with the axis of said through bore, a deep inverted cup-shaped member having an annular shoulder projecting inwardly from the interior sidewall thereof, porous filtering means normally held assembled against said shoulder by the T-head of said T-shaped member, the ends of which T-head have a press fit with the interior sidewall of said cup-shaped member, and the aforesaid components cooperating therewith to provide a downwardly opening inverted U-shaped breather passage having one end in open communication with the upper end of said tubular fitting and its other end in communication with the atmosphere at a lower level and effective to safeguard against the entrance of moisture while permitting breathing as necessary to avoid a pressure differential between the interior and exterior of a cable equipped with said accessory.