Environmentally sealed multichannel fiber optic connector

• US 5,018,822 A
• Filed: 12/11/1989
• Issued: 05/28/1991
• Est. Priority Date: 12/11/1989
• Status: Expired due to Fees

• Current Assignee: Litton Systems Incorporated
• Original Assignee: Litton Systems Incorporated
• Inventors: Freismuth, John S., Knowles, Robert G.
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Wise, Robert E.
• Application Number:
  US07/448,794
• Time in Patent Office: 533 Days
• Field of Search: 350/96.20, 350/96.21, 350/96.22
• US Class Current: 385/56
• CPC Class Codes: G02B 6/3823 containing surplus lengths, internal fibre loops provisionally see also G02B6/444
• 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 6/3847 with means preventing fibre end damage, e.g. recessed fibre surfaces
• 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 6/3894 Screw-lock type

Abstract

A multichannel separable fiber optic connector includes two-part splice fixtures which are retained in the center body of the connector. A keying arrangement between the splice fixture halves and the center body insure that the fixture halves are always mated together in the same angular relationship, and a common sleeve in the center body aligns the fixture halves along a common surface. The optic fibers and fiber splices are protected by removable backshells which are environmentally sealed to the center body and to the cable jacket.

Claims

1. A multichannel separable fiber optic connector comprising:

an elongated cylindrical housing comprising a center body and a pair of backshells removably attached to either side of the center body, the cylindrical housing having an axis which extends from one end of the housing to the other;

a retainer mounted in the center body having at least one splice aperture formed therein extending from one side of the retainer to the other in a direction which is generally parallel to the axis of the housing;

a keyway formed in both ends of each splice aperture;

a two-part rotary splice comprising two splice parts, each splice part having a fiber bore for receiving an optic fiber, an end face on one end, and an external key on the other end which mates with said keyways; and

means for holding each splice part in engagement with a splice aperture with the two end faces of the splice parts in an abutting relationship with one another, whereby the keyways in the ends of each mounting aperture allows insertion of the splice part in only one angular orientation.

2. The connector of claim 1 further comprising:

a single sleeve lining each splice aperture, whereby said single sleeve aligns the two parts of each rotary splice part along a common surface.

3. The connector of claim 2 further comprising:

a plurality of splice apertures and two-part rotary splices; and

a compression plate mounted in each backshell, said compression plate engaging the end of each rotary splice which extends from the retainer into the backshell, said compression plate comprising said means for holding.

4. The connector of claim 3 further comprising:

a prong formed on the backshell and a notch formed on the center body, whereby the engagement of the prong in the notch prevents rotation of the backshell relative to the center body during attachment of the backshell to the center body.

5. The connector of claim 4 further comprising:

a coupling nut on each backshell for removably attaching the backshells to the center body.

6. The connector of claim 3 further comprising:

a cable aperture in one end of each backshell for receiving a fiber optic cable; and

first sealing means at each cable aperture for sealing between the backshell and the cable; and

second sealing means at the junction of the center body with each backshell, whereby the interior of the connector is environmentally sealed from the exterior.