Optical fiber splice organizer

• US 4,840,449 A
• Filed: 01/27/1988
• Issued: 06/20/1989
• Est. Priority Date: 01/27/1988
• Status: Expired due to Term

• Current Assignee: Fitel USA Corporation
• Original Assignee: American Telephone & Telegraph Company (AT&T, Inc.)
• Inventors: Ghandeharizadeh, Shahryar
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): PALMER, PHAN T H
• Application Number:
  US07/149,036
• Time in Patent Office: 510 Days
• Field of Search: 350/96.10, 350/96.15, 350/96.20, 350/96.21
• US Class Current: 385/135
• CPC Class Codes: G02B 6/444 Systems or boxes with surplus lengths
• CPC Class Codes: G02B 6/4454 with splices
• 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

An optical fiber organizer and splicing arrangement permits storage of variable lengths of surplus fiber. The organizer has a pair of separated cylinders extending from a first rectangular section of a base plate and a splice tray having opposite entrance sides for optical fiber in a second rectangular section. Each cylinder has a prescribed height permitting wrapping of multiple loops of fiber around the cylinder circumference and a diameter determined by the fiber bend radius restriction. The splicing tray is spaced from the base plate to permit passage of optical fiber underneath the splicing tray. The surplus fiber is directed around one or both cylinders and underneath the splicing tray through a plurality of different length passageways so that the varying lengths of optical fiber are stored. Clockwise, counter clockwise and figure eight loops are used so that each optical fiber end is directed to predetermined entrance side of the splicing tray without exceeding the fiber bend radius restriction.

Claims

1. A device for organizing optical fibers separated from at least one optical fiber cable comprising:

a rectangular base plate of prescribed width and length divided along its width into first and second rectangular sections;

sidewalls on the opposite edges along the width of the rectangular base plate; and

an optical fiber splice tray having a pair of opposite entrance sides for optical fiber ends;

the first rectangular section of the base plate comprising first and second cylinders extending outward a predetermined distance from the base plate, each cylinder having a diameter greater than twice the minimum bend radius of the separated optical fiber and being spaced from the other cylinder, from the sidewall adjacent thereto and from the edge of the rectangular base plate along the length of the first rectangular sections;

the second rectangular section of the base plate comprising means for mounting the optical fiber splice tray a predetermined distance from the base plate to form a channel for separated optical fibers between said base plate and the splice tray;

the at least one optical fiber cable running substantially parallel to the edge of the first section of the rectangular base plate along its length;

the space between the first cylinder and the sidewall adjacent thereto in the first rectangular section forming a first channel having an entrance at the edge of the rectangular base plate along its length for receiving a plurality of optical fibers separated from the at least one optical fiber cable running substantially parallel to the edge of the first rectangular section along its length,

a first passageway for directing at least one optical fiber separated from the at least one optical fiber cable running parallel to the length of the first rectangular section from the entrance of the first channel to one entrance side of the optical fiber splice tray, said first passageway guiding the at least one optical fiber at least around the first cylinder in a first direction through the first channel, the channel formed by the space between the first and second cylinders and the channel between the base plate and the splice tray in variable length loops each exceeding the minimum bend radius of the separated optical fiber, and

a second passageway for directing at least one other optical fiber separated from the at least one optical fiber cable running parallel to the length of the first rectangular section from the entrance of the first channel to the other entrance side of the optical fiber splice tray, said second passageway guiding the at least one other optical fiber at least around the first cylinder in a first direction and around the second cylinder in a second direction opposite the first direction through the first channel, the channel formed by the space between the first and second cylinders, the channel formed by the space between the second cylinder and the sidewall adjacent thereto and the channel between the base plate and the splice tray in variable length loops each exceeding the minimum bend radius of the optical fiber.

2. A device for organizing optical fibers separated from at least one optical fiber cable according to claim 1 wherein:

the first passageway includes

one or more loops for the separated one optical fiber running counterclockwise around the first cylinder; and

the second passageway includes at least one loop for the other separated optical fiber running counterclockwise around the first cylinder and at least one loop for the other separated optical fiber running clockwise around the second cylinder.

3. A device for organizing optical fibers separated from at least one optical fiber cable according to claim 1 wherein the means for mounting said optical fiber splice tray a predetermined distance from the base plate to form a channel for the separated optical fibers between said base plate and the splice tray comprises a pair of posts for maintaining the splice tray at said predetermined distance, each post having a curved surface perpendicular to the base plate for guiding optical fiber in said second rectangular section into the channel formed by the space between the first and second cylinders in said first rectangular section.

4. A device for organizing optical fibers separated from at least one optical fiber cable according to claim 1 wherein

each sidewall includes a corner extension at each end;

each corner extension having a concave curved surface perpendicular to the base plate for channeling optical fiber around the corner within the rectangular base plate without exceeding the minimum bend radius of the fiber.

5. A device for organizing optical fibers separated from at least one optical fiber cable according to claim 1, 2, 3 or 4 wherein said device is made of molded plastic.

6. A device for organizing optical fibers separated from at least one optical fiber cables according to claim 1 wherein the space between the second cylinder and the sidewall adjacent thereto in the first rectangular section forms a second channel having an entrance at the edge of the rectangular base plate along its length for receiving at least one optical fiber separated from the at least one optical fiber cable running substantially parallel to the edge of the first rectangular section of the base plate along its length, and further comprising

a third passageway for directing at least one optical fiber separated from the at least one optical fiber cable running parallel to the length of the first rectangular section from the entrance of the second channel to one entrance side of the optical fiber splice tray, said third passageway guiding the at least one optical fiber at least around the second cylinder in the second direction including the second channel, the channel formed by the space between the first and second cylinders and the channel between the base plate and the splice tray in variable length loops each exceeding the minimum bend radius of the optical fiber, and

a fourth passageway for directing at least one other optical fiber separated from the at least one optical fiber cable running parallel to the length of the first rectangular section from the entrance of the second channel to the other entrance side of the optical fiber splice tray, said fourth passageway guiding the other optical fiber at least around the second cylinder in the second direction and around the first cylinder in the first direction including the second channel, the channel formed by the space between the first and second cylinders, the first channel and the channel between the base plate and the splice tray in variable length loops each exceeding the minimum bend radius of the optical fiber.

7. A device for interconnecting optical fibers separated from at least one sheathed optical fiber cable comprising:

at least one optical fiber organizer;

at least one optical fiber splice tray having opposite optical fiber entrance sides;

a housing for enclosing said at least one optical fiber organizer having a base plate, sidewalls and a cover plate;

a structure for supporting said at least one optical fiber organizer within said housing having a transverse member attached to the base plate of said housing and a pair of brackets extending along the housing sidewalls at the ends of said transverse member in said housing;

said at least one optical fiber organizer in said support structure comprising a rectangular base plate of prescribed width and length divided along its width into first and second rectangular sections, and sidewalls on the opposite edges along the width of the rectangular base plate of the organizer;

the first rectangular section of the organizer comprising first and second cylinders extending outward a predetermined distance from the rectangular organizer base plate, each cylinder having a diameter greater than twice the minimum bend radius of the optical fiber and being spaced from the other cylinder, from the sidewall adjacent thereto, and from the edge of the rectangular organizer base plate along the length of the first rectangular section;

the second rectangular section of the organizer comprising means for mounting the optical fiber splice tray a predetermined distance from said organizer base plate to form at least one channel for optical fibers separated from the at least one sheathed optical fiber cable between the base plate and the optical fiber splice tray;

the at least one sheathed optical fiber cable running between the edge of the first rectangular section of the organizer base plate along its length and the sidewall of the housing adjacent thereto;

the space between the first cylinder and the organizer sidewall adjacent thereto in the first rectangular section forming a first channel having an entrance at the edge of the rectangular base plate along its length for receiving optical fibers separated from the at least one sheathed optical fiber cable running between the edge of the first rectangular section of the organizer base plate along its length and the sidewall of the housing adjacent thereto;

a first passageway for directing at least one optical fiber separated from the at least one sheathed optical fiber cable running parallel to the length of the first rectangular section of the organizer from the entrance of the first channel to one entrance side of the optical fiber splice tray, the first passageway guiding the one optical fiber at least around the first cylinder in a first direction including the first channel, the channel formed by the space between the first and second cylinders and the channel between the base plate and the splice tray in variable length loops each exceeding the minimum bend radius of the optical fiber,

a second passageway for directing at least one other optical fiber separated from the at least one sheathed optical fiber cable running parallel to the length of the first section from the entrance of the first channel to the other entrance side of the optical fiber splice tray, said second passageway guiding the at least one other optical fiber at least around the first cylinder in the first direction and around the second cylinder in a second direction including the first channel, the channel formed by the space between the first and second cylinders, the channel formed by the space between the second cylinder and the sidewall adjacent thereto and the channel between the base plate and the splice tray in variable length loops each exceeding the minimum bend radius of the optical fiber.

8. A device for interconnecting optical fibers separated from at least one sheathed optical fiber cable according to claim wherein

the first passageway of at least one organizer comprises one or more loops for the at least one optical fiber running clockwise around the first cylinder;

and

the second passageway includes at least one loop for the at least one other optical fiber running counterclockwise around the first cylinder and at least one loop for the other optical fiber running clockwise around the second cylinder.