Optical fiber apparatus

• US 10,247,896 B2
• Filed: 03/25/2011
• Issued: 04/02/2019
• Est. Priority Date: 03/26/2010
• Status: Active Grant

• Current Assignee: British Telecommunications PLC (BT Group PLC)
• Original Assignee: British Telecommunications PLC (BT Group PLC)
• Inventors: Kerry, Matthew John, Kerry, John, Barker, Philip Alfred
• Primary Examiner(s): Chu, Chris H
• Application Number:
  US13/637,613
• Publication Number:
  US 20130011110A1
• Time in Patent Office: 2,930 Days
• Field of Search: None
• CPC Class Codes: G02B 6/4455 characterised by the way of extraction or insertion of the cassette in the distribution frame, e.g. pivoting, sliding, rotating or gliding

Abstract

Embodiments of an optical fiber splice tray assembly for attachment to a backplane are disclosed. In an embodiment, an optical fiber splice tray assembly includes a primary tray having a primary tray base, fiber retention means for retaining optical fiber against the primary tray base, fiber splice accommodation means, first attachment means for attaching the primary tray to the backplane, and second attachment means for attaching a secondary tray having a secondary tray base, to the primary tray, wherein the secondary tray is attached indirectly to the backplane via the primary tray using the second attachment means.

Claims

1. An optical fiber splice tray assembly comprising:

a primary tray having a primary optical fiber splice working surface configured to receive one or more optical fiber splices; and

a secondary tray having a secondary optical fiber splice working surface configured to receive one or more optical fiber splices;

primary attachment means for moveably attaching the first tray to a backplane, the primary attachment means being configured to enable the primary tray to pivot about a first axis; and

secondary attachment means moveably attaching the primary tray to the secondary tray, the primary attachment means being located in a position at a rear of the primary tray and the secondary attachment means being located in a position at a front of the primary tray, the secondary attachment means being configured to enable the secondary tray to pivot about a second axis parallel to and spaced apart from the first axis such that the secondary tray is movable between

a first position in which the primary optical fiber splice working surface is exposed, and

a second position in which the secondary optical fiber splice working surface is exposed and the primary optical fiber splice working surface is substantially covered by the secondary tray nested within the primary tray, the second tray being smaller than the primary tray.

2. An optical fiber splice tray assembly according to claim 1, wherein, during use, the secondary tray hangs downwardly from the primary tray in the first position.

3. An optical fiber splice tray assembly according to claim 1, wherein the primary optical fiber splice working surface of the primary tray includes a lip along an edge, and wherein the secondary tray is configured to be nested substantially within the edge and height of the lip in the second position.

4. An optical fiber splice tray assembly according to claim 1, wherein the primary optical fiber splice working surface includes fiber retention means and fiber splice accommodation means, and wherein the fiber retention means and the fiber splice accommodation means are configured to accommodate the secondary tray when in the second position.

5. An optical fiber splice tray assembly according to claim 4, wherein the fiber splice accommodation means comprises one or more grooves on each of the optical fiber splice working surfaces of the primary and secondary trays, and wherein the grooves of the secondary tray are configured to nest in an offset position to the grooves of the primary tray.

6. An optical fiber splice tray for use as a secondary tray with a primary tray to form an optical fiber splice tray assembly, the assembly comprising:

the primary tray having a primary optical fiber splice working surface configured to receive one or more optical fiber splices;

the secondary tray having a secondary optical fiber splice working surface configured to receive one or more optical fiber splices;

primary attachment means for moveably attaching the first tray to a backplane, the primary attachment means being configured to enable the primary tray to pivot about a first axis; and

secondary attachment means moveably attaching the primary tray to the secondary tray, the primary attachment means being located in a position at a rear of the primary tray and the secondary attachment means being located in a position at the front of the primary tray, the secondary attachment means being configured to enable the secondary tray to pivot about a second axis parallel to and spaced apart from the first axis such that the secondary tray is movable between

a first position in which the primary optical fiber splice working surface is exposed, and

a second position in which the secondary optical fiber splice working surface is exposed and the primary optical fiber splice working surface is substantially covered by the secondary tray nested within the primary tray, the secondary tray being smaller than the primary tray.

7. A method of accommodating a plurality of optical fiber splices using an optical fiber splice tray assembly, the assembly comprising a primary tray having a primary optical fiber splice working surface configured to receive one or more optical fiber splices, a secondary tray having a secondary optical fiber splice working surface configured to receive one or more optical fiber splices, primary attachment means for moveably attaching the first tray to a backplane, the primary attachment means being configured to enable the primary tray to pivot about a first axis, and secondary attachment means for moveably attaching the primary tray to the secondary tray, the primary attachment means being located in a position at a rear of the primary tray and the secondary attachment means being located in a position at the front of the primary tray, the secondary attachment means being configured to enable the secondary tray to pivot about a second axis parallel to and spaced apart from the first axis such that the secondary tray is movable between a first position in which the primary optical fiber splice working surface is exposed, and a second position in which the secondary optical fiber splice working surface is exposed and the primary optical fiber splice working surface is substantially covered by the secondary tray nested within the primary tray, the secondary tray being smaller than the primary tray, the method comprising:

moving the secondary tray to the first position to hang away from the primary tray, and while the secondary tray is in the first position;

accommodating one or more of the plurality of fiber splices in the primary tray using fiber splice accommodation means, and

storing optical fiber on the primary tray using fiber retention means; and

moving the secondary tray to the second position to face substantially the same direction as the working surface of the primary tray, and while in the second position;

accommodating one or more of the plurality of fiber splices in the secondary tray using fiber splice accommodation means, and

storing optical fiber on the secondary tray using fiber retention means.