US5029966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug pin receiving an LWG coaxially and method of manufacturing same
Assignee: US Philips Corp
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Filing: 1989-12-05
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Granted: 1991-07-09
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Expires: 2009-12-05
Abstract
Abstract The invention relates to a plug pin which receives an LWG coaxially and which consists of a hard basic material having a low coefficient of thermal expansion. An accurate working of the convex surface of the plug pin is possible without any problems in that its outer convex surface is provided on at least a part of its length with a coating, having a thickness of less than 300 μm, in particular less than 150 μm, of a material which can be subjected to a chipping treatment better than the basic material.
Inventors
- 👤 Klaus Serapins
- 👤 Karl-Theo Jostes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:52
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/3833; G02B6/3854; G02B6/3834; G02B6/3835
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
A plug pin receiving an LWG coaxially, which pin has an external convex surface and consists of a hard basic material having a low coefficient of thermal expansion, said external convex surface of the plug pin, at least over a part of its length, being provided with a coating having a thickness of less than 300 μm of a material which can better be subjected to a chipping treatment than the basic material.
Claim 2
Dependent Claim
73 words
A plug pin receiving an LWG coaxially, which pin has an external convex surface and consists of a hard basic material having a low coefficient of thermal expansion, said external convex surface of the plug pin, at least over a part of its length, being provided with a coating having a thickness of less than 300 μm of a material which can better be subjected to a chipping treatment than the basic material.
Claim 3
Dependent Claim
16 words
A plug pin as claimed in claim 1, wherein the basic material is coated with nickel.
Claim 4
Dependent Claim
56 words
A plug pin as claimed in claim 2 wherein the basic body of the plug pin which consists of a hard basic material comprises two longitudinal areas of different diameters, a first coating being provided on both longitudinal areas, and an additional second coating being provided on the front longitudinal area which has a smaller diameter.
Claim 5
Dependent Claim
16 words
A plug pin as claimed in claim 2, wherein the nickel is electrodeposited in a layer.
Claim 6
Dependent Claim
56 words
A plug pin as claimed in claim 4 wherein the basic body of the plug pin which consists of a hard basic material comprises two longitudinal areas of different diameters, a first coating being provided on both longitudinal areas, and an additional second coating being provided on the front longitudinal area which has a smaller diameter.
Claim 7
Dependent Claim
57 words
A plug pin as claimed in claim 1, wherein the basic body of the plug pin which consists of a hard basic material comprises two longitudinal areas of different diameters, a first coating being provided on both longitudinal areas, and that an additional second coating being provided on the front longitudinal area which has a smaller diameter.
Claim 8
Dependent Claim
15 words
A plug pin as claimed in claim 6, wherein the coatings consist of different materials.
Claim 9
Dependent Claim
20 words
A plug pin as claimed in claim 7, wherein the first coating is copper and the second coating is nickel.
Claim 10
Independent Claim
159 words
A method of manufacturing a cylindrical plug pin receiving an LWG coaxially, said plug pin having a coaxial bore, in which method an LWG is inserted in the coaxial bore of the plug pin after which the plug pin is tensioned in an optical lathe in an axis of rotation aligned to the optical axis of the LWG, and the convex surface of the plug pin is subjected to a chipping treatment centrically to the optical axis of the LWG, wherein: the plug pin is manufactured from a hard basic body (1, 5) the outside diameter of which has a small undersize of less than 30 μm with respect to the desired diameter of the plug pin; at least one layer (4, 6, 7) of a material which can better be worked than the basic material is then provided at a thickness which is larger than one-half the undersize; and the desired diameter is produced by a chipping treatment.
Claim 11
Independent Claim
159 words
A method of manufacturing a cylindrical plug pin receiving an LWG coaxially, said plug pin having a coaxial bore, in which method an LWG is inserted in the coaxial bore of the plug pin after which the plug pin is tensioned in an optical lathe in an axis of rotation aligned to the optical axis of the LWG, and the convex surface of the plug pin is subjected to a chipping treatment centrically to the optical axis of the LWG, wherein: the plug pin is manufactured from a hard basic body (1, 5) the outside diameter of which has a small undersize of less than 30 μm with respect to the desired diameter of the plug pin; at least one layer (4, 6, 7) of a material which can better be worked than the basic material is then provided at a thickness which is larger than one-half the undersize; and the desired diameter is produced by a chipping treatment.
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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) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |