Patent US4869571A successfully refreshed from Google Patents.
US4869571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug pin for a light waveguide
Assignee: US Philips Corp
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Filing: 1988-06-27
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Granted: 1989-09-26
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Expires: 2008-06-27
Abstract
Abstract The invention relates to a plug pin for a light waveguide (LWG) which can be plugged in a pin bushing, comprising a core tube having a central aperture into which core the LWG can be inserted and which tube is enveloped by a sleeve made of a material which is softer than that of the core tube and which has a higher coefficient of thermal expansion. A plug connection which is low-loss in a large temperature range is obtained in that the wall thicknesses of the sleeve (3) and of the core tube (2) are proportioned so that the resulting coefficient of thermal expansion of the plug pin corresponds substantially to the value of the material of the pin bushing (4).
Inventors
- 👤 Horst Hubner
- 👤 Ulrich Grzesik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:20
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; G02B6/3854
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A plug pin for a light waveguide which can be plugged in a pin bushing, comprising a core tube having a central aperture into which the light waveguide can be inserted and which tube is enveloped by a sleeve made of a material which is softer than that of the core tube and has a higher coefficient of thermal expansion, wherein the wall thicknesses of the sleeve and of the core tube are proportioned so that the resulting coefficient of thermal expansion of the plug pin corresponds substantially to the value of the material of the pin bushing.
Claim 2
Dependent Claim
98 words
A plug pin for a light waveguide which can be plugged in a pin bushing, comprising a core tube having a central aperture into which the light waveguide can be inserted and which tube is enveloped by a sleeve made of a material which is softer than that of the core tube and has a higher coefficient of thermal expansion, wherein the wall thicknesses of the sleeve and of the core tube are proportioned so that the resulting coefficient of thermal expansion of the plug pin corresponds substantially to the value of the material of the pin bushing.
Claim 3
Dependent Claim
22 words
An arrangement as claimed in claim 1, wherein the wall thickness of the sleeve is smaller than that of the core tube.
Claim 4
Dependent Claim
33 words
An arrangement as claimed in claim 1 or 2, wherein the coefficient of thermal expansion of the material of the core tube is smaller than that of the material of the pin bushing.
Claim 5
Dependent Claim
21 words
A plug pin as claimed in claim 1, wherein the material of the sleeve can be subjected to a chipping process.
Claim 6
Independent Claim
65 words
A method of manufacturing a plug pin comprising a core tube having a central aperture into which a light waveguide can be inserted, which tube is enveloped by a sleeve, comprising a step of manufacturing the sleeve to have an inside diameter which is smaller than the outside diameter of the core tube and superimposing the sleeve over the core tube in the heated condition.
Claim 7
Independent Claim
65 words
A method of manufacturing a plug pin comprising a core tube having a central aperture into which a light waveguide can be inserted, which tube is enveloped by a sleeve, comprising a step of manufacturing the sleeve to have an inside diameter which is smaller than the outside diameter of the core tube and superimposing the sleeve over the core tube in the heated condition.
Claim 8
Dependent Claim
51 words
A method as claimed in claim 5, wherein the core tube consists of a ceramic and a soft-metallic iron-free sleeve whose inside diameter is at least 0.003 mm smaller than the outside diameter of the core tube is slid over the core tube at a temperature of 250° to 350° C.
Claim 9
Dependent Claim
16 words
A method as claimed in claim 5, wherein the sleeve is bonded to the core tube.
Claim 10
Dependent Claim
27 words
A method as claimed in claim 5, wherein the sleeve is provided on the core tube in the molten condition as a layer of a soldering material.
References Cited (Backward Citations)
US4166672A
Cited
US4261642A
Cited
US4390237A
Cited
US4695124A
Cited
US4722584A
Cited
US4691986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |