Tray for organizing optical fiber splices and enclosures embodying such trays

• US 4,359,262 A
• Filed: 06/30/1980
• Issued: 11/16/1982
• Est. Priority Date: 06/30/1980
• Status: Expired due to Term

• Current Assignee: Siecor Technology, Inc. (Corning Incorporated)
• Original Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Inventors: Dolan, Bruce I.
• Primary Examiner(s): Lee, John D.
• Application Number:
  US06/164,242
• Time in Patent Office: 869 Days
• Field of Search: 174/59, 350/96.20, 350/96.21, 350/96.22, 350/96.23, 211/49 R, 211/49 S, 211/126, 312/42, 312/50, 312/126, 312/127
• US Class Current: 385/135
• CPC Class Codes: G02B 6/444 Systems or boxes with surplus lengths
• CPC Class Codes: G02B 6/4477 with means for strain-relieving to interior strengths element

Abstract

An organizing tray for optical fiber splices has a plurality of grooves extending longitudinally, with resilient parts to retain packaged splices in the grooves. The tray snaps on to support tie members extending between end plates. Trays can be stacked one on another, with a top cover. Fibers are led from the cable ends into the trays via tubes. Excess fiber between cable ends and the splices is coiled in the tray and retained by a longitudinal strap. An enclosure will generally have a plurality of stacked trays, with an outer casing. Means can be provided for joining strength members in the cables. Copper conductors may also be included in the cables and are connected in the enclosure.

Claims

1. A tray for organizing optical fiber splices, comprising:

a central web;

a plurality of grooves extending longitudinally on an upper surface of the web, said grooves including resilient means for holding packaged splices;

means extending from a lower surface of the web for mounting of a tray on a support;

means extending from the upper surface of the web for positioning a cover over the web and packaged splices.

2. A tray as claimed in claim 1, said means extending from a lower surface of the web comprising a downward extending rib at each side of the web and an inward projection extending along the bottom edge of each rib.

3. A tray as claimed in claim 2, said means extending from the upper surface of the web comprising an upward extending rib at each side of the web and a flange extending inward from an upper edge of each rib.

4. A tray as claimed in claim 3, including a further rib extending downward from said lower surface, spaced inwardly from and parallel to each of said downward extending ribs, and an outwardly extending projection extending along a bottom edge of each further rib, said further ribs and projections adapted to snap between inner edges of said flanges extending inward from the upper edges of the ribs extending upward from the web.

5. A tray as claimed in claim 3, said upwardly extending ribs and inwardly extending flanges defining, with said web, a channel along each side of a tray.

6. A tray as claimed in claim 5, said channels adapted to receive plastic tubes at each end, said tubes each containing at least one optical fiber, and retaining means at each end of each channel for retaining said tubes in said channels.

7. A tray as claimed in claim 1, including a strap extending longitudinally to retain optical fiber lengths in the tray.

8. A tray as claimed in claim 1, said grooves defined by parallel ribs integral with said web, and a cap of resilient material attached to a top surface of each rib, the cap extending laterally to each side of the rib.

9. A tray as claimed in claim 1, said grooves defined by parallel ribs integral with a layer of resilient material attached to said web.

10. A tray as claimed in claim 1, formed from a length of extruded plastics material.

11. An enclosure for optical fiber cable splices, comprising:

two spaced apart end plates, each plate including an aperture for entry of an optical fiber cable therethrough;

a pair of spaced tie members connecting said end plates;

an elongate tray supported on said tie members, the tray having a central web and a plurality of grooves extending longitudinally on an upper surface of the web, the grooves including resilient means for holding packaged splices;

the tray including means extending from a lower surface of the web for engaging with said tie members to locate and support said tray on said tie members and means extending from an upper surface of the web for positioning a cover over the web and packaged splices.

12. An enclosure as claimed in claim 11, including a further tray mounted and supported on said tray, said further tray including means extending from a lower surface of the web for interengagement with said means extending from the upper surface of the web of said tray, whereby said further tray acts as a cover for said tray, said tray and said further tray being of the same form.

13. An enclosure as claimed in claim 12, including a layer of resilient material attached to the lower surface of the web of the further tray, to retain packaged splices in the grooves in said tray.

14. An enclosure as claimed in claim 11, an optical fiber cable end extending through each end plate, each cable including a core having a plurality of grooves, at least one optical fiber in each of at least some of the grooves, a plastic tube extending from each groove containing an optical fiber, each tube having one end located and retained in a groove and the other end located and retained in one end of a tray, the tubes from one cable end located at one end of a tray and tubes from the other cable located at the other end of the tray.

15. An enclosure as claimed in claim 14, said means extending from an upper surface of the web comprising an upwardly extending rib at each side of the web and a flange extending inward from an upper edge of each rib, said upwardly extending ribs and inwardly extending flanges defining, with said web, a channel along each side of a tray, said tubes having said other ends located and retained in the channels.

16. An enclosure as claimed in claim 14, including a plurality of said trays mounted one above another, tubes from one cable extending from the core to one end of each of said trays and tubes from the other cable extending from the core to the other end of each of said trays.

17. An enclosure as claimed in claim 16, a cover attached to the top tray, and at least one restraining member passing round said tie members, said trays and said cover.

18. An enclosure as claimed in claim 16, including an outer casing connected to the end plates and enclosing said trays.

19. An enclosure as claimed in claim 18, said end plate formed of two halves butted about the related cable and a strap around each end plate retaining the two halves in butted relationship.

20. An enclosure as claimed in claim 19, including a wrapping of sealing tape around each cable end, the end plates engaged with the cable ends at said sealing tape.

21. An enclosure as claimed in claim 18, said casing comprising two halves of semi-cylindrical form, said halves clamped together along each side.

22. An enclosure as claimed in claim 18, each end plate comprising a lead plate, a lead tube over each cable end and passing through said aperture in each end plate, said tubes soldered to said end plates, said casing comprising a lead sleeve extending between the end plates and soldered thereto.

23. An enclosure as claimed in claim 16, a packaged optical fiber splice positioned in each of at least some of the grooves on each tray, and a coil of optical fiber extending from each side of each splice, the fiber on one side of a splice extending from one cable and the fiber on the other side of a splice extending from the other cable, the coils of fiber stored in the related tray, and a retaining strap extending longitudinally of each tray to retain the coils of fiber in the trays.

24. An enclosure as claimed in claim 14, said optical fiber cables including a central strength member, including means connecting said strength members of the two cables.

25. An enclosure as claimed in claim 14, each said optical fiber cable including at least one metal conductor in at least one of said grooves in said core, and means connecting the metal conductors.

26. An enclosure as claimed in claim 25, including a loading coil mounted on said cover, said loading coil connected to said metal conductors.

27. An enclosure as claimed in claim 14, a packaged optical fiber splice positioned in each of at least some of the grooves on the tray, and a coil of optical fiber extending from each side of each splice, the fiber on one side of a splice extending from one cable and the fiber on the other side of a splice extending from the other cable, the coils of fiber stored in the trays, and a retaining strap extending longitudinally of the tray to retain the coils of fiber in the tray.