Universal optical fiber buildout system

• US 5,274,729 A
• Filed: 07/30/1992
• Issued: 12/28/1993
• Est. Priority Date: 07/30/1992
• Status: Expired due to Fees

• Current Assignee: Fitel USA Corporation
• Original Assignee: AT&T, Inc.
• Inventors: Stephenson, Daniel L., Travieso, Ruben, King, Wilton W.
• Primary Examiner(s): Lee, John D.
• Application Number:
  US07/924,687
• Time in Patent Office: 516 Days
• Field of Search: 385/53, 385/55, 385/56, 385/58, 385/59, 385/60, 385/70, 385/71, 385/72, 385/73, 385/89, 385/134, 385/135, 385/139, 385/140
• US Class Current: 385/134
• CPC Class Codes: G02B 6/264 with optical elements between opposed fibre ends which perform a function other than beam splitting having lens focusing means G02B6/32; utilising prism or grating G02B6/34
• CPC Class Codes: G02B 6/266 the optical element being an attenuator
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3877 Split sleeves
• CPC Class Codes: G02B 6/3891 Bayonet type
• CPC Class Codes: G02B 6/3894 Screw-lock type
• CPC Class Codes: G02B 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence

Abstract

In order to mount optical fiber connectors in a panel (22), the panel is provided with a plurality of openings in each of which is disposed a buildout system. Each buildout system includes a buildout block each having a portion disposed on a rear side of the panel and adapted to have an optical fiber connector assembled thereto. Any one of three buildout blocks may be used in order to receive a desired connector which may be an ST, SC, or FC connector. Secured through a latching arrangement to the portion of the buildout block on a front side of the panel is a buildout which may have any one of three configurations to accept any one of the three connectors. The latching arrangement between buildout block and buildout is the same for any combination of buildout block and buildout. As a result of the structure of the buildout system, a buildout and a buildout block may be selected to connect any combination of the connectors.

Claims

1. A buildout system for optical fiber connectors, said buildout system comprising:

a buildout block which has a longitudinal axis, the rear portion of the buildout block being capable of having secured thereto a connector and a front portion thereof being adapted to receive any one of a plurality of different buildouts and having a latching arrangement; and

a buildout, having a substantially rectangular cross section in a plane which is normal to the longitudinal axis," the front portion of which is capable of being secured to a connector and a rear portion of which is adapted to be assembled to said front portion of said buildout block, the buildout being capable of being assembled to any one of a plurality of different buildout blocks and having a latching arrangement which rotationally cooperates with the latching arrangement of said buildout block to hold the buildout assembled to said buildout block;

the latching arrangement of the buildout block and of the buildout being the same for any combination of buildout block and buildout.

2. The buildout system of claim 1, wherein said front portion of said buildout block includes a latching arrangement which includes diagonally opposed portions.

3. The buildout system of claim 1, wherein said buildout is assembled to said buildout block by moving said buildout in a direction parallel to said longitudinal axis and then turning said buildout about said longitudinal axis to cause said latching arrangement to become effective to secure said buildout to said buildout block.

4. The buildout system of claim 3, wherein Cartesian coordinate X and Y axes are associated with said cross section of said buildout and with a transverse cross section of said buildout block and said buildout prior to being secured to said buildout block is oriented in axial alignment with said buildout block with an X axis of said buildout displaced at an angle to the X axis of the buildout block such that when said buildout is turned to align the X axis of the buildout with the X axis of the buildout block, the latching arrangement becomes effective to secure said buildout to said buildout block.

5. The buildout system of claim 4, wherein said buildout block includes a flange from which extend two diametrically opposed projecting portions in a direction parallel to the longitudinal axis with one of said projecting portions including a latching keeper which extends further in the direction parallel to the longitudinal axis and wherein said buildout includes a supporting frame to one side of which is attached one end of a cantilevered arm having a release tab adjacent to the other end thereof, said arm being capable of being deflected inwardly toward said supporting frame so that when said buildout is moved into engagement with said buildout block and turned, said arm is deflected to allow the other end of said arm to become seated in latching engagement with said keeper, the application of inwardly directed force to said release tab being effective to cause the other end of said arm to be depressed to disengage the other end of said arm from said keeper and allow disassembly of said buildout from said buildout block.

6. The buildout system of claim 5, wherein said supporting frame of said buildout includes an opening therein and wherein said buildout includes an adapter which is adapted to be connected to said supporting frame such that a portion of a tubular housing of said adapter extends through said opening with another portion extending in an opposite direction.

7. The buildout system of claim 6, wherein said adapter includes an alignment sleeve which is disposed in said tubular housing, said alignment sleeve being adapted to receive in each end thereof a ferrule which terminates an end of an optical fiber.

8. The buildout system of claim 7, wherein said alignment sleeve is formed with a longitudinal slot in a wall thereof, wherein said buildout includes an attenuation means comprising an attenuator disc which is supported from a pad by a hangar which extends through said slot of said alignment sleeve, said pad being capable of being moved along said sleeve to accommodate positionining of ferrules which become disposed in said sleeve.

9. The buildout system of claim 8, wherein said tubular housing includes at least one opening forming in a wall thereof adjacent to one end of said tubular housing and wherein said buildout system includes a retention cap which includes at least one detent projecting from a surface of said cap such that when said cap is assembled to an end of said tubular housing, said detent snap-locks into said opening in said wall of said tubular housing to secure said retention cap to said tubular housing.

10. The buildout system of claim 7, wherein said flange of said buildout block includes a tubular portion extending from a side of the flange opposite to that from which said latching arrangement is disposed and having a longitudinal slot formed in a wall thereof and two diametrically opposed pins which project from the wall of said tubular portion, said buildout block also including an externally threaded collar which is disposed about said tubular portion and in engagement with said flange.

11. The buildout system of claim 7, wherein said buildout includes a base having a tubular portion extending therefrom with a longitudinal slot formed in a wall thereof and two diametrically opposed pins projecting from said wall.

12. The buildout system of claim 7, wherein said buildout block includes a tubular portion having a substantially rectangular transverse cross section projecting from a side of said flange opposite to that side from which said latching arrangement is disposed, said buildout block further including two diametrically opposed cantilevered arms which are disposed within said tubular portion, said arms being deflectable to facilitate securing engagement with a connector body which is inserted into said tubular portion.

13. The buildout system of claim 12 wherein said tubular portion having said substantially rectangular transverse cross section includes a latching finger provided in each of two opposed walls thereof, said latching fingers being depressed as the buildout block is inserted into an opening in a panel and moving outwardly to secure said buildout block in said panel when the fingers have been moved past walls which define the opening in the panel.

14. The buildout system of claim 7, wherein said buildout includes a tubular portion having a substantially rectangular transverse cross section projecting from a base portion thereof said buildout further including two cantilevered arms disposed within said tubular portion and capable of being deflected to engage portions of a connector body which is inserted into said tubular portion to secure said connector body to said tubular portion.

15. The buildout system of claim 14, wherein said tubular portion of said buildout block and of said buildout each includes a longitudinally extending slot which is adapted to receive a key of a connector housing which is adapted to be received in the tubular portion of said buildout block and of said buildout.

16. The buildout system of claim 7, wherein said buildout block includes an externally threaded tubular portion extending from said flange and an externally threaded collar which is disposed about said tubular portion and which is in engagement with said flange.

17. The buildout system of claim 7, wherein said buildout includes an externally threaded tubular portion which extends from a base portion thereof in a direction opposite to that in which said tubular housing extends.