Optical fiber storage and connector tray and shelf and tray assembly

• US 5,167,001 A
• Filed: 09/03/1991
• Issued: 11/24/1992
• Est. Priority Date: 09/03/1991
• Status: Expired due to Term

• Current Assignee: Siecor Technology, Inc. (Corning Incorporated)
• Original Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Inventors: Debortoli, George, Hvezda, Jaroslav M., Desjardins, Jacques R.
• Primary Examiner(s): Lee, John D.
• Assistant Examiner(s): BARNS, STEPHEN
• Application Number:
  US07/753,587
• Time in Patent Office: 448 Days
• Field of Search: 385/135
• US Class Current: 385/135
• CPC Class Codes: G02B 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence
• 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 tray including a fiber connector holder with storage in the holder for incoming fibers for connection to rear facing ends of the connectors. Front facing connector ends are joined to outgoing fibers in the form of patch cords which pass through a storage facility in which each patch cord is disposed in its own storage region. A minimum bend radius channel through which the patch cords travel is movable in the tray to lessen the distance moved by patch cords as the tray is moved forwardly and rearwardly. This movable channel allows for excess fiber from within the tray during tray movement and without disturbing patch cord material outside the tray.

Claims

1. An optical fiber tray having a front end region and a rear end region and comprising:

a mounting region for optical connectors, the mounting region disposed at the front end region of the tray and comprising a plurality of connector mounting positions disposed in a series which extends from mounting position to mounting position laterally of the tray so that the connectors when mounted in the mounting positions each has an end facing forwardly and another end facing rearwardly of the connector;

a first storage facility for optical fibers to be connected to rear facing ends of the connectors, the storage facility disposed rearwardly of the mounting position;

a second storage facility with access to the second storage facility for other optical fibers to be connected to forward facing ends of the connectors, the second storage facility comprising a series of side-by-side dividers which are disposable into operating positions to separate the second storage facility into a series of storage regions between the dividers, the dividers being movable from the operating positions to provide access to any individual storage region; and

a minimum bend radius limiting means for directing the other optical fibers from the second storage facility and outwardly from the tray, the minimum bend radius limiting means freely movable in a direction extending between the front and rear end regions of the tray.

2. A tray according to claim 1 wherein the dividers are separately hinged to the tray to permit hinging of a required number of dividers to provide access to any individual storage region.

3. A tray according to claim 2 wherein the dividers are pivotally hinged to the tray about parallel axes and the dividers are substantially planar and are normally disposed in operating positions in substantially parallel planes with the parallel axes relatively disposed along a line inclined to said parallel planes to permit the dividers in turn to be pivoted out of the operating positions free from interference with any divider previously moved from the operating position.

4. A tray according to claim 1 wherein the minimum bend radius limiting means is mounted upon a rearwardly extending slide which is slidably mounted upon the tray.

5. A tray according to claim 1 provided with an optical connector holder and an optical connector holder receptacle, the optical connector holder provided with the first storage facility and the mounting region, the optical connector holder mounted within the receptacle for movement forwardly from a holder receiving station in the receptacle to a position in which a front end region of the optical connector holder extends beyond the receptacle, and the second storage facility is disposed in the optical connector holder receptacle laterally of the optical connector holder.

6. A tray according to claim 5 wherein the optical connector holder has a connector guard movable between a connector guarding position extending in front of the mounting region and a position removed from the guarding position.

7. A tray according to claim 1 provided with an optical connector holder and an optical connector holder receptacle;

the second storage facility disposed in the optical connector holder receptacle laterally between the optical connector holder and the minimum bend radius limiting means;

the minimum bend radius limiting means movable between the front and rear end regions of the tray relative to the second storage facility; and

the optical connector holder provided with the first storage facility and the mounting region with the optical connector holder mounted with the receptacle for movement, relative to the second storage facility, forwardly from a holder receiving station in the receptacle to a position in which a front end region of the optical connector holder extends beyond the receptacle.

8. An optical fiber shelf and tray assembly comprising a shelf having a front and a rear and a plurality of optical fiber trays movable individually through the front of the shelf into and out of storage positions within the shelf in which positions the trays are disposed in parallel series relationship, and each optical fiber tray has a front end region and a rear end region and comprises:

a mounting region for optical connectors, the mounting region disposed at the front end region of the tray and comprising a plurality of connector mounting positions disposed in a series which extends from mounting position to mounting position laterally of the tray so that the connectors when mounted in the mounting positions each has an end facing forwardly and another end facing rearwardly of the connector;

a first storage facility for optical fibers to be connected to rear facing ends of the connectors, the first storage facility mounted rearwardly of the mounting region;

a second storage facility with access to the second storage facility for other optical fibers to be connected to forward facing ends of the connectors, the second storage facility comprising a series of side-by-side dividers which are disposable into operating positions to separate the second storage facility into a series of storage regions between the dividers, the dividers being movable from the operating positions to provide access to any individual storage region; and

a minimum bend radius limiting means for directing the other optical fibers from the second storage facility and outwardly from the shelf, the minimum bend radius limiting means freely movable in a direction extending between the front and rear end regions of the tray.

9. An assembly according to claim 8 wherein in each tray the dividers are separately hinged to the tray to permit hinging of a required number of dividers to provide access to any individual storage region.

10. An assembly according to claim 9 wherein in each tray the dividers are pivotally hinged to the tray about parallel axes and the dividers are substantially planar and are normally disposed in operating positions in substantially parallel planes with the parallel axes relatively disposed along a line inclined to said parallel planes to permit the dividers in turn to be pivoted out of the operating positions free from interference with any divider previously moved from its operating position.

11. An assembly according to claim 8 wherein in each tray, the minimum bend radius limiting means is mounted upon a rearwardly extending slide which is slidable upon the tray, the minimum bend radius limiting means extending around a front edge of the shelf with the tray in its storage position.

12. An assembly according to claim 11 wherein each tray is fitted with said other optical fibers, the other optical fibers extending from connectors mounted in the mounting positions, through the second storage facility and around the minimum bend radius limiting means to pass outwardly of the shelf, the other fibers resisting forward movement of the minimum bend radius limiting means as the tray is moved forwardly from its storage position within the shelf until a rear part of the tray approaches and then engages the slide to move the slide and the minimum bend radius limiting means forward with the tray, and upon return movement of the tray to the storage position, the other optical fibers assist in moving the minimum bend radius limiting means rearwardly towards the front edge of the shelf.

13. An assembly according to claim 12 wherein each tray comprises an optical connector holder and an optical connector holder receptacle, the optical connector holder provided with the first storage facility and the mounting region, the optical connector holder mounted within the receptacle for movement forwardly from a holder receiving station in the receptacle to a position in which a front end region of the optical connector holder extends beyond the receptacle, and the second storage facility is disposed in the optical connector holder receptacle laterally of the optical connector holder.

14. An assembly according to claim 13 wherein the optical connector holder of each tray has a connector guard movable between a connector guarding position extending in front of the mounting region and a position removed from the guarding position, the guard being retained in its guarding position when the tray is disposed within the storage position, and being movable from the guarding position only when the tray is moved forwardly from the storage position.

15. An assembly according to claim 8 wherein each tray is provided with an optical connector holder and an optical connector holder receptacle, and in each tray:

the second storage facility is disposed in the optical connector holder receptacle laterally between the optical connector holder and the minimum bend radius limiting means;

the minimum bend radium limiting means is movable between the front and rear end regions of the tray relative to the second storage facility;

and the optical connector holder is provided with the first storage facility and the mounting region with the optical connector holder mounted within the receptacle for movement, relative to the second storage facility, forwardly from a holder receiving station in the receptacle to a position in which a front end region of the optical connector holder extends beyond the receptacle.