Entrance terminals for telecommunications cable
AssigneeNorthern Telecom Limited
InventorsGordon P. F. Clark, Richard Benoit, Zbigniew T. Karwowski
Life of this patent
Estimating the term…
Abstract
Entrance terminal housing having walls sealed together at their junctions and defining a chamber opening. A removable cover is provided for the opening and a seal between walls and cover. In preferred arrangements, removable covers isolate terminals within the housing from other terminals and also isolate the terminals from the rest of the chamber. A fire resistant conductor sleeve is provided of flexible material and is of radially expansible and collapsible tapered tubular form for sealing around a range of numbers of conductors passing through a wall of the housing. In one construction, the sleeve has axially extending corrugations which allow for its expansion and collapse.
Claims10
An entrance terminal housing comprising:
- walls which define a chamber, the walls sealingly joined together and between them defining an opening to the chamber, at least one of the walls defining at least one aperture for passage of conductors of a cable through the wall;
- a cover for removably closing the opening and a sealing means to provide a seal between the walls and the cover when the opening is closed;
- and a plurality of positions each for holding a terminal connector to electrically connect terminals of an incoming cable with another cable, a plurality of individual covers provided for covering each of said positions or groups of said positions so as to isolate individual connectors or groups of connectors from one another.
A fire resistant conductor sleeve for forming a substantial fire resistant coupling between entrance terminals for cable, the sleeve formed from a flexible fire resistant material and being of tubular form with a radially expansible and collapsible tapered axially extending section having a plurality of circumferentially spaced and axially extending corrugations, radial expansion of the tapered section opening the corrugations around the sleeve and radial collapse accompanied by collapse of the corrugations, and a sealing section at the larger diameter end of the tapered section, the sealing section comprising two axially spaced-apart seals each formed by at least one flange for sealing against a surface of a terminal housing.
A housing assembly for an entrance terminal assembly comprising at least two housings for conductors, at least one being an entrance terminal housing having a plurality of positions each for holding a terminal connector to electrically connect terminals of an incoming cable with another cable, a plurality of individual covers provided for covering each of said positions or groups of said positions so as to isolate individual connectors or groups of connectors from one another, each housing having walls which define a chamber with the walls sealingly joined together and between them defining an opening to the chamber, each housing also comprising a cover for removably closing the opening and a sealing means to provide a seal between the walls and cover when the opening is closed, a wall of each housing also defining an aperture for passage of conductors of a cable through the wall, the two apertures being aligned and the assembly also comprising a fire resistant conductor sleeve for location between the terminals and through the apertures for forming a substantial fire barrier between housings, the sleeve formed from a flexible fire resistant material and being of tubular form with a radially expansible and collapsible tapered axially extending section and a sealing section at the larger diameter end of the tapered section, the sealing section comprising two axially spaced-apart seals, one for each housing, each sealed formed by at least one flange for sealing against a part of the wall surrounding the aperture of the associated housing, at least one of said housings having a wall defining another aperture for passage of conductors of a cable through the wall into the chamber of said at least one housing.
Dependencies are inferred from the claim text.