Splice casing assembly

• US 4,974,925 A
• Filed: 02/02/1990
• Issued: 12/04/1990
• Est. Priority Date: 02/02/1990
• Status: Expired due to Fees

• Current Assignee: Siecor Puerto Rico Incorporated
• Original Assignee: GTE Products Corporation
• Inventors: Troutman, Timmy D., Opdahl, Barry J., Gee, Arnold E.
• Primary Examiner(s): Lee, John D.
• Application Number:
  US07/474,577
• Time in Patent Office: 305 Days
• Field of Search: 350/96.20, 350/96.21, 350/96.22, 350/96.23
• US Class Current: 385/99
• CPC Class Codes: G02B 6/2558 Reinforcement of splice joint
• CPC Class Codes: G02B 6/3801 Permanent connections, i.e. wherein fibres are kept aligned by mechanical means splices by bonding G02B6/255; fusion splices G02B6/2551
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression
• CPC Class Codes: G02B 6/444 Systems or boxes with surplus lengths

Abstract

A splice casing assembly for splicing together lengths of fiber optic cable wherein respective ends of individual glass fibers are spliced together by a splicing member which is attached to an elongated support bar which has an end block fastened to either end thereof to which respective strength members are fastened by being guided around respective end blocks in an axial direction and tied in a knot. Respective knots are held in place by set screws which are axially threaded into respective end blocks. The entire assembly is enclosed in a tubular housing.

Claims

1. A splice casing assembly for splicing a first length of fiber optic cable to a second length of fiber optic cable, comprising:

an elongated support bar extending along a longitudinal axis and having a first tongue extending from a first end and a second tongue extending from an opposite second end;

means in association with said elongated support bar and positioned between said first end and said opposite second end for splicing together individual glass fibers extending from said first length of fiber optic cable and said second length of fiber optic cable;

first means coupled to said first end of said elongated support bar for securing in place a length of first strength members of said first length of fiber optic cable, said first means including a first end block extending along said longitudinal axis from a first end block extremity which is adjacent said first end of said elongated support bar to an opposite first end block extremity and comprising a first transverse groove extending in a direction transverse to said longitudinal axis at said first end block extremity, said first tongue fitting into said first transverse groove,

second means coupled to said second end of said elongated support bar for securing in place a length of second strength members of said second length of fiber optic cable, said second means including a second end block extending along said longitudinal axis from a second end block extremity which is adjacent said second end of said elongated support bar to an opposite second end block extremity and comprising a second transverse groove extending in a direction transverse to said longitudinal axis at said second end block extremity, said second tongue fitting into said second transverse groove;

an elongated member having an internal cavity extending therethrough from one extremity to an opposite extremity for housing said elongated support bar, said first means and said second means;

means associated with said one extremity for enclosing said cavity at said one extremity and securing in place said first length of fiber optic cable; and

means associated with said opposite extremity for enclosing said cavity at said opposite extremity and securing in place said second length of fiber optic cable.

2. The splice casing assembly of claim 1 wherein said first end block includes a pair of first opposing side surfaces and a respective first groove extending in the direction of said longitudinal axis along each first side surface of said pair of opposing first side surfaces for receiving respective lengths of said first strength members, and wherein said first transverse groove extends from one of said respective first grooves to another of said respective first grooves, and wherein said second end block includes a pair of second opposing side surfaces and a respective second groove extending in the direction of said longitudinal axis along each second side surface of said pair of opposing second side surfaces for receiving respective lengths of said second strength members, and wherein said second transverse groove extends from one of said respective second grooves to another of said respective second grooves.

3. The splice casing assembly of claim 2 wherein said first end block includes a first internally threaded area extending along said longitudinal axis along opposing walls of said first transverse groove towards a base of said first transverse groove and further includes a first set screw for screwing into said first internally threaded area for sandwiching said length of first strength members between said first set screw and said base of said first transverse groove, and wherein said second end block includes a second internally threaded area extending along said longitudinal axis along opposing walls of said second transverse groove towards a base of said second transverse groove and further includes a second set screw for screwing into said second internally threaded area for sandwiching said length of second strength members between said second set screw and said base of said second transverse groove.

4. The splice casing assembly of claim 3 wherein said splicing means includes at least one splice clip extending outwardly from at least one surface of said elongated support bar and further includes at least one splicing device for splicing together said individual glass fibers, said at least one splicing device being held in place by said at least one splice clip.

5. The splice casing assembly of claim 1 wherein said first end block includes a first internally threaded area extending along said longitudinal axis along opposing walls of said first transverse groove towards a base of said first transverse groove and further includes a first set screw for screwing into said first internally threaded area for sandwiching said length of first strength members between said first set screw and said base of said first transverse groove, and wherein said second end block includes a second internally threaded area extending along said longitudinal axis along opposing walls of said second transverse groove towards a base of said second transverse groove and further includes a second set screw for screwing into said second internally threaded area for sandwiching said length of second strength members between said second set screw and said base of said second transverse groove.

6. The splice casing assembly of claim 1 wherein said splicing means includes at least one splice clip extending outwardly from at least one surface of said elongated support bar and further includes at least one splicing device for splicing together said individual glass fibers, said at least one splicing device being held in place by said at least one splice clip.

7. The splice casing assembly of claim 1 wherein said first end block and said second end block each comprise an upper surface, a lower surface, and a pair of opposing side surfaces and a pair of opposing end surfaces which join together said upper surface and said lower surface, and a respective first groove extending in the direction of said longitudinal axis along each side surface of said pair of opposing side surfaces, and wherein said first transverse groove and said second transverse groove are formed in a respective of said first end block and said second end block by a respective transverse groove extending along an end surface of said pair of opposing end surfaces to connect said respective first grooves.

8. The splice casing assembly of claim 7 wherein one or both of said upper surface and said lower surface include a channel extending in the direction of said longitudinal axis between said pair of opposing end surfaces for accommodating respective individual glass fibers.

9. A spliced fiber optic cable, comprising:

a first length of fiber optic cable and a second length of fiber optic cable;

an elongated support bar extending along a longitudinal axis and having a first tongue extending from a first end and a second tongue extending from an opposite second end;

at least one splicing device splicing individual glass fibers of said first length of fiber optic cable to respective individual glass fibers of said second length of fiber optic cable;

means associated with said elongated support bar and positioned between said first end and said opposite second end for holding said at least one splicing device in place relative to said elongated support bar;

a first member coupled to said first end of said elongated support bar and securing in place a length of first strength members of said first length of fiber optic cable, said first member including a first end block extending along said longitudinal axis from a first end block extremity which is adjacent said first end of said elongated support bar to an opposite first end block extremity and comprising a first transverse groove extending in a direction transverse to said longitudinal axis at said first end block extremity, said first tongue and a first portion of said length of first strength members being fitted into said first transverse groove such that said first portion of said length of first strength members is positioned between said first tongue and a base of said first transverse groove;

a second member coupled to said second end of said elongated support bar and securing in place a length of second strength members of said second length of fiber optic cable, said second member including a second end block extending along said longitudinal axis from a second end block extremity which is adjacent said second end of said elongated support bar to an opposite second end block extremity and comprising a second transverse groove extending in a direction transverse to said longitudinal axis at said second end block extremity, said second tongue and a first portion of said length of second strength members being fitted into said second transverse groove such that said first portion of said length of second strength members is positioned between said second tongue and a base of said second transverse groove;

an elongated member having an internal cavity extending therethrough from one extremity to an opposite extremity, said elongated support bar, said first member and said second member being positioned within said cavity;

means associated with said one extremity for enclosing said cavity at said one extremity and securing in place said first length of fiber optic cable; and

means associated with said opposite extremity for enclosing said cavity at said opposite extremity and securing in place said second length of fiber optic cable.

10. The spliced fiber optic cable of claim 9 wherein said first end block includes a pair of first opposing side surfaces and a respective first groove extending in the direction of said longitudinal axis along each first side surface of said pair of opposing first side surfaces, a further portion of said length of first strength members being positioned within a respective first groove, and wherein said first transverse groove extends from one of said respective first grooves to another of said respective first grooves, and wherein said second end block includes a pair of second opposing side surfaces and a respective second groove extending in the direction of said longitudinal axis along each second side surface of said pair of opposing second side surfaces, a further portion of said length of second strength members being positioned within a respective second groove, and wherein said second transverse groove extends from one of said respective second grooves to another of said respective second grooves.

11. The spliced fiber optic cable of claim 10 further including a first internally threaded area extending along said longitudinal axis along opposing walls of said first transverse groove from said first end block extremity towards said base of said first transverse groove, and further including a first set screw screwed into said first internally threaded area and sandwiching said first portion of said length of first strength members between said first set screw and said base of said first transverse groove, and further including a second internally threaded area extending along said longitudinal axis along opposing walls of said second transverse groove from said second end block extremity towards said base of said second transverse groove and further including a second set screw screwed into said second internally threaded area and sandwiching said first portion of said length of second strength members between said second set screw and said base of said second transverse groove.

12. The spliced fiber optic cable of claim 11 wherein said length of first strength members are tied into a first knot which is positioned in said first transverse groove, said first set screw sandwiching said first knot between said first set screw and said base of said first transverse groove, and further wherein said length of second strength members are tied into a second knot which is positioned in said second transverse groove, said second set screw sandwiching said second knot between said second set screw and said base of said second transverse groove.