Method for fishing lines in serial conduits

Abstract

For fishing lines through a number of conduits connecting one or more junction boxes or terminal devices, a bridging section temporarily couples incoming and outgoing conduits through the junction box or device. The bridging section has an internal contour leading smoothly from one conduit end to the other, the conduit ends typically protruding into the junction box such that the bridging section can enclose over the outside of the protruding portions of the conduit ends. The bridging section can have two sections divided longitudinally, coupled at a hinge axis and spring biased to engage against one another. Preferably the closed bridging section is substantially airtight and continues an airtight path through the two conduits, whereby the lines can be fished by pneumatically blowing a plug connected to a string through the path for the lines. The string is attached to the lines, which are pulled back through the conduits. For effecting connections the user removes the bridging section and pulls down sufficient slack in the lines for making desired connections. The invention reduces the number of times the user needs to visit each successive junction box along a cable route and thus reduces the cost of installing cables and other lines.

Dependencies are inferred from the claim text.