Patent US4351586A successfully refreshed from Google Patents.
US4351586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Termination of optical fibers
Assignee: International Standard Electric Corp
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Filing: 1976-04-23
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Granted: 1982-09-28
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Expires: 1996-04-23
Abstract
Abstract A watch pierced bearing jewel forms the end of a sheathed optical fiber termination. The jewel is located on axis of a ferrule. The fiber is threaded through the jewel aperture and cemented in position. The jewel and ferrule may be held concentric in a resilient molded jig during assembly of the fiber thereto.
Inventors
- 👤 Michael J. Phillips
- 👤 Aubrey M. Crick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/3833; G02B6/3855; G02B6/3861; G02B6/3834; G02B6/3835; G02B6/3865; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49895
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
A sheathed optical fiber termination comprising: a hollow cylindrical ferrule; an optical fiber mounted lengthwise in said ferrule and having its sheathing terminating within said ferrule leaving a forward unsheathed end portion of said fiber in said ferrule; a pierced watch bearing jewel fixedly mounted at the forward end of said ferrule having an aperture therein coaxial with the center axis of said ferrule; and said unsheathed end portion of said fiber being threaded into said aperture.
Claim 2
Dependent Claim
77 words
A sheathed optical fiber termination comprising: a hollow cylindrical ferrule; an optical fiber mounted lengthwise in said ferrule and having its sheathing terminating within said ferrule leaving a forward unsheathed end portion of said fiber in said ferrule; a pierced watch bearing jewel fixedly mounted at the forward end of said ferrule having an aperture therein coaxial with the center axis of said ferrule; and said unsheathed end portion of said fiber being threaded into said aperture.
Claim 3
Dependent Claim
26 words
A sheathed optical fiber termination as set forth in claim 1 wherein: said watch pierced bearing jewel has an oil retaining recess facing into said ferrule.
Claim 4
Dependent Claim
20 words
A sheathed optical fiber termination as set forth in claim 1 wherein: said ferrule is filled with an epoxy resin.
Claim 5
Dependent Claim
31 words
A sheathed optical fiber termination as set forth in claim 3 wherein: said jewel is outside of said forward end of said ferrule and supported thereon by said epoxy resin filler.
Claim 6
Dependent Claim
27 words
A sheathed optical fiber termination as set forth in claim 1 wherein: the outer surface of said jewel is flush with said forward end of said ferrule.
Claim 7
Independent Claim
100 words
A method of making a sheathed optical fiber termination comprising the steps of: using a circularly symmetric jig to hold a bushing having a central aperture therein coaxially with and in front of the forward end of a hollow cylindrical ferrule; inserting a sheathed optical fiber having an unsheathed end portion into said ferrule from the rear end thereof until the sheathing of the fiber terminates within said ferrule; threading said unsheathed fiber end portion into said central aperture in said bushing; and thereafter introducing a resin into said ferrule to fill the same and allowing said resin to cure.
Claim 8
Independent Claim
100 words
A method of making a sheathed optical fiber termination comprising the steps of: using a circularly symmetric jig to hold a bushing having a central aperture therein coaxially with and in front of the forward end of a hollow cylindrical ferrule; inserting a sheathed optical fiber having an unsheathed end portion into said ferrule from the rear end thereof until the sheathing of the fiber terminates within said ferrule; threading said unsheathed fiber end portion into said central aperture in said bushing; and thereafter introducing a resin into said ferrule to fill the same and allowing said resin to cure.
Claim 9
Dependent Claim
46 words
An optical fiber contact comprising: a tubular ferrule having a forward end; and a pierced watch bearing jewel fixedly mounted at the forward end of said ferrule having a center aperture therein adapted to receive the end of an optical fiber mounted lengthwise in said ferrule.
Claim 10
Dependent Claim
46 words
An optical fiber contact comprising: a tubular ferrule having a forward end; and a pierced watch bearing jewel fixedly mounted at the forward end of said ferrule having a center aperture therein adapted to receive the end of an optical fiber mounted lengthwise in said ferrule.
Claim 11
Dependent Claim
74 words
An optical fiber termination comprising: a tubular ferrule having a forward end and a rear end; a pierced watch bearing jewel fixedly mounted at the forward end of said ferrule having a center aperture therein; and a single optical fiber extending into said ferrule from said rear end and having a forward end portion threaded into said aperture, said forward end portion of said fiber being the only optical fiber located in said aperture.
Claim 12
Dependent Claim
74 words
An optical fiber termination comprising: a tubular ferrule having a forward end and a rear end; a pierced watch bearing jewel fixedly mounted at the forward end of said ferrule having a center aperture therein; and a single optical fiber extending into said ferrule from said rear end and having a forward end portion threaded into said aperture, said forward end portion of said fiber being the only optical fiber located in said aperture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |