Fiber optic connector assembly

• US 4,140,366 A
• Filed: 04/19/1977
• Issued: 02/20/1979
• Est. Priority Date: 04/19/1977
• Status: Expired due to Term

• Current Assignee: Amphenol Corporation
• Original Assignee: Bunker Ramo Corporation
• Inventors: Makuch, John A., Fredlund, Henry R. Jr.
• Primary Examiner(s): Corbin, John K.
• Assistant Examiner(s): Levy, Stewart
• Application Number:
  US05/788,820
• Time in Patent Office: 672 Days
• Field of Search: 350/96 C, 350/96.21, 350/96.22
• US Class Current: 385/58
• CPC Class Codes: G02B 6/3831 comprising a keying element on the plug or adapter, e.g. to forbid wrong connection keying element on the ferrule G02B6/3851; keying element for electrical coupling H01R13/64
• CPC Class Codes: G02B 6/3835 using discs, bushings or the like
• CPC Class Codes: G02B 6/3847 with means preventing fibre end damage, e.g. recessed fibre surfaces
• CPC Class Codes: G02B 6/3861 Adhesive bonding adhesives in general C09J
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• CPC Class Codes: G02B 6/3874 using tubes, sleeves to align ferrules
• CPC Class Codes: G02B 6/3878 comprising a plurality of ferrules, branching and break-out means
• CPC Class Codes: G02B 6/3883 using rods, pins or balls to align a plurality of pairs of ferrule ends
• CPC Class Codes: G02B 6/406 of the ferrule type, connecting a plurality of pairs of ferrules

Abstract

An assembly for use in a fiber optic connector for aligning and spacing the terminal ends of a pair of fiber optic cables to achieve efficient light transfer includes a pair of terminal pins, each having a bore for receiving one of the cables and an external shoulder. A resilient sleeve is tightly received over the terminal pins to align the terminal ends in facing relation and abuts the terminal pin shoulders to effect a predetermined close spacing of the terminal ends to provide efficient light transfer between the pair of fiber optic cables.

In a preferred form, each terminal pin includes an insert member which has a concentric channel for receiving and aligning one of the fiber optic cables concentric with the outer dimension of the terminal pin.

Claims

1. An assembly for aligning and spacing the terminal ends of a pair of fiber optic cables to achieve efficient light transfer between the cables comprising:

a first terminal pin having an opening extending therethrough for receiving the terminal end of one of the cables and having stop means associated therewith;

insert means dimensioned for insertion into said first terminal pin and having a channel communicating with said opening for receiving and aligning the terminal end of said one of the cables in a centered position relative to the outer surface of said first terminal pin;

a second terminal pin having an opening extending therethrough for receiving the terminal end of the other of the cables and having stop means associated therewith;

insert means dimensioned for insertion into said second terminal pin and having a channel communicating with said opening for receiving and aligning the terminal end of said other of the cables in a centered position relative to the outer surface of said second terminal pin; and

resilient sleeve means having an opening extending therethrough tightly conforming to the size and shape of the outer surface of said first and second terminal pins, said sleeve means receiving said first and second terminal pins in telescoping fashion for aligning said terminal ends in facing relation, said sleeve means cooperating with said stop means to effect a predetermined close spacing of said terminal ends in centered relation, whereby said assembly provides an efficient light transfer between said pair of fiber optic cables.

2. The assembly as defined in claim 1 wherein said first and second terminal pins each comprise a tubular housing, said openings extending through said terminal pins comprise bores, and said resilient sleeve means comprises a resilient tubular member having an inner diameter which is equal to or slightly less than the outer diameter of said tubular housings.

3. The assembly as defined in claim 2 wherein each of said tubular housings includes a major diameter portion and a minor diameter portion, and each of said stop means comprises an external shoulder portion joining said major diameter portion and said minor diameter portion of one of said tubular housings.

4. The assembly as defined in claim 3 wherein each of said tubular housings includes a rear portion and a forward portion, a longitudinal bore dimensioned for receiving the terminal end of one of the cables, and a counter bore in said forward portion concentric with the outer dimension of said tubular housing and greater in dimension than said longitudinal bore, and each of said insert means is a tubular member dimensioned for insertion into one of said counter bores and said channel of said insert means is concentric with said longitudinal bore and communicates with said longitudinal bore to receive the terminal end of one of the cables for alignment substantially concentric to the outer dimension of said tubular housing.

5. The assembly as defined in claim 4 wherein said concentric channel of each of said tubular insert members is smaller in dimension than said longitudinal bore in the corresponding one of said tubular hosuings and each of said tubular insert members further includes an inner tapering side wall portion joining the corresponding ones of said longitudinal bores and said concentric channels.

6. The assembly as defined in claim 5 wherein each of said fiber optic cables includes an outer jacket and an inner fiber optic core, each of said tubular housings includes a second counter bore in said rear portion thereof dimensioned for receiving said outer jacket of one of said fiber optic cables, and each of said longitudinal bores and said channels are dimensioned for receiving said fiber optic core of one of said fiber optic cables.

7. The assembly as defined in claim 6 wherein said sleeve means is formed from Teflon.

8. An assembly for aligning the terminal ends of first and second segments of light conductive cable and maintaining the spacing between the terminal ends for efficient light transfer comprising:

a first terminal pin having a forward portion and having an opening extending therethrough for receiving the terminal end of one of said cable segments, said first terminal pin having stop means associated therewith rearwardly of said forward portion;

means associated with said forward portion of said first terminal pin for receiving and aligning the terminal end of said one of said cable segments in a centered position relative to the outer surface of said first terminal pin;

a second terminal pin having a forward portion and having an opening extending therethrough for receiving the terminal end of the other of said cable segments, said second terminal pin having stop means associated therewith rearwardly of said forward portion;

means associated with said forward portion of said second terminal pin for receiving and aligning the terminal end of said other of said cable segments in a centered position relative to the outer surface of said second terminal pin; and

resilient sleeve means having an opening extending therethrough tightly conforming to the size and shape of the outer surface of said forward portions of said first and second terminal pins, said sleeve means receiving said forward portions of said first and second terminal pins in telescoping fashion for aligning the terminal ends of said cable segments in facing relation, said sleeve means cooperating with said stop means to maintain a close predetermined spacing of said terminal ends in centered relation, whereby said assembly provides an efficient light transfer between said first and second cable segments.

9. The assembly as defined in claim 8 wherein the opening in each of said terminal pins includes a longitudinal bore extending therethrough and a counter bore in said forward portion concentric with the outer diameter of said forward portion, said counter bore being greater in diameter than said longitudinal bore, and each of said receiving and aligning means includes a tubular insert member disposed within said counter bore having a channel concentric with the outer diameter of said insert member, said channel being in communication with said longitudinal bore for receiving the terminal end of one of said cable segments to align said cable substantially concentric to the outer diameter of said forward portion of one of said terminal pins.