Patent US5113475A successfully refreshed from Google Patents.
US5113475A
Expired / Lapsed
US
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Fibre-optic entry to an enclosure
Assignee: Smiths Group PLC
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Filing: 1991-03-08
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Granted: 1992-05-12
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Expires: 2011-03-08
Abstract
Abstract An optical fibre connector or similar entry for an optical fibre cable to an aperture in a enclosure has a metal shell supporting a resilient insert made of an elastomeric polymer loaded with up to about 30% of a material such as carbon particles so that the insert is absorptive of microwave energy at wavelengths similar to the size of the aperture. The faces of the insert have electrically-conductive layers thereon. The optical fibres of the cable are terminated in metal ferrules supported in apertures in the insert.
Inventors
- 👤 Peter D. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:51
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4439; G02B6/4471; G02B6/24; G02B6/42; G02B6/4201; G02B6/4274; G02B6/4277; G02B6/4401; G02B6/4415; G02B6/4427; G02B6/4428; G02B6/36; G02B6/3628; G02B6/3632; G02B6/3644
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
In an entry for an optical fibre to an enclosure of the kind in which the entry is located in an aperture in a wall of the enclosure, the improvement wherein the entry includes a resilient insert of a first insulative material loaded with a second material different from the first material, wherein the optical fibre extends in a hole through the insert, and wherein the insert is absorptive of microwave energy at wavelengths similar to the size of the aperture in the wall.
Claim 2
Dependent Claim
84 words
In an entry for an optical fibre to an enclosure of the kind in which the entry is located in an aperture in a wall of the enclosure, the improvement wherein the entry includes a resilient insert of a first insulative material loaded with a second material different from the first material, wherein the optical fibre extends in a hole through the insert, and wherein the insert is absorptive of microwave energy at wavelengths similar to the size of the aperture in the wall.
Claim 3
Dependent Claim
31 words
An entry according to claim 1, wherein the second material is selected from a group comprising: carbon particles, metal particles, carbonyl iron, metal fibres, non-conducting magnetic iron oxides and sintered ferrites.
Claim 4
Dependent Claim
24 words
An entry according to claim 1, wherein the second material is present in proportions up to about 30% of the weight of the insert.
Claim 5
Dependent Claim
14 words
An entry according to claim 1, wherein the first material is an elastomeric polymer.
Claim 6
Dependent Claim
25 words
An entry according to claim 1, wherein the entry includes an outer metal shell, and wherein the insert is located within the outer metal shell.
Claim 7
Dependent Claim
28 words
An entry according to claim 1, wherein the insert has a face through which the hole extends, and wherein the face has a layer of electrically-conductive material thereon.
Claim 8
Dependent Claim
27 words
An entry according to claim 1, wherein the insert includes a metal ferrule supported by the insert, and wherein optical fibre is terminated within the metal ferrule.
Claim 9
Dependent Claim
79 words
In an optical fibre connector of the kind mounted at an end of a fibre-optic cable and having an outer shell located in an aperture in a wall of an enclosure, at least one optical fibre being terminated in the connector, the improvement wherein the shell includes an insert fabricated of a material that is absorptive of microwave energy at wavelengths similar to the diameter of the shell, the optical fibre being located in a hole through the insert.
Claim 10
Dependent Claim
79 words
In an optical fibre connector of the kind mounted at an end of a fibre-optic cable and having an outer shell located in an aperture in a wall of an enclosure, at least one optical fibre being terminated in the connector, the improvement wherein the shell includes an insert fabricated of a material that is absorptive of microwave energy at wavelengths similar to the diameter of the shell, the optical fibre being located in a hole through the insert.
References Cited (Backward Citations)
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US4460243A
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GB2140930A
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EP0340950A1
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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) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |