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 Space-saving optical fiber cable closure

Details
Inventors: Cobb, Gary S.; Dunn, Lawrence R.; Evers, Melvin W.; Jones, Wesley W.;
Assignee: AT&T Bell Laboratories (Murray Hill, NJ)
Primary Examiner: Gonzalez; Frank
Assistant Examiner:
Attorney, Agent or Firm: Somers; Edward W.

An optical fiber cable closure (20) includes a cable termination assembly (26) and a cover (28) into which the termination assembly is inserted. The cable termination assembly includes an end plate assembly (34) through which distribution cables (21,22) to be spliced extend. From the end plate is cantilevered a distribution portion (106) which supports an optical fiber organizer (115). Mounted on the fiber organizer adjacent to a longitudinal edge thereof are a plurality of stacked organizing modules (120,120). Each module includes a plurality of nests (134-134) for receiving splicing devices such that the axes of the fibers in the devices are parallel to each other and to an axis of the closure. Optical fibers from each incoming cable are routed in individual bundles or as ribbons from the distribution portion to selected ones of the modules. The stacked organizing modules are held spaced above the fiber organizer to allow fiber to become routed therebetween thereby allowing a radius of curvature which exceeds that if the fiber had been routed between the stack of modules and an opposite longitudinal edge.

DETAILED DESCRIPTION Referring now to FIG.
1 there is shown an optical fiber cable closure which is designated generally by the numeral 20.
The closure 20 is suitable, for example, for use in fiber-in-the-loop.
For example, in FIG.
2 there is shown a closure 20 in which distribution cables 21 and 22 extend into the closure and are spliced to drop cables 23 and 24 which extend from the closure to a customer or to a distant terminal 25.
From the distant terminal, media (not shown) extend to the customer.
The closure 20 includes a cable splicing termination assembly which is designated generally by the numeral 26 (see FIGS.
1, 3 and 4) and in which optical fibers 27--27 are spliced and/or stored and a cover 28.
The cover 28 is cylindrically shaped and includes an open end 29 and a closed end 30.
An axis 32 of the closure extends from the open end 29 of the cover to the closed end 30.
In order to assemble the cable splicing termination assembly 26 with the cover 28, the cable splicing termination assembly is inserted into the open end 29 of the cover and moved toward the closed end.
As also can be seen in FIG.
1, the cable splicing termination assembly 26 includes a cable entry portion 31.
The cable entry portion 31 includes an end plate assembly 34 a portion of which is disc-shaped.
The end plate assembly 34 preferably is made of a molded, glass-reinforced plastic material.
Each end plate assembly 34 includes two portions 36 and 38 (see FIG.
5).
The portion 36 includes a partially circular flange 40, an outwardly projecting portion 42 and an inwardly projecting portion 44 (see also FIG.
3).
The outwardly projecting portion 42 includes a housing portion 46 (see FIG.
5) having an extension which is designated generally by the numeral 48.
The extension 48 includes two semi-circular conduits 47--47 which are disposed between landings 49--49 of the extension.
Each of the landings 49--49 is provided with a threaded opening 45.
As can be seen in FIG.
3, the inwardly extending portion 44 includes a housing portion 50 from which extends a landing portion 51 comprising spaced ears



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