US4386388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board assembly
Assignee: Nortel Networks Ltd
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Filing: 1981-09-04
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Granted: 1983-05-31
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Expires: 2001-09-04
Abstract
Abstract A protective cover formed from sheet aluminum, which is used to provide both electrical shielding and mechanical protection for a printed circuit board and its components. The abutting edges of the tubular cover are held in contiguous relationship when the cover is in place, by inturned edges which engage small notches in end plates which are affixed to the printed circuit board.
Inventors
- 👤 Roger A. Beun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:11
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0062; Y; Y10; Y10S; Y10S174/00; Y10S174/34
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
In a printed circuit board assembly, comprising: a printed circuit board for mounting electrical components thereon; a pair of end plates affixed at opposed ends of the board; a tubular protective cover supported at its ends by the pair of end plates in spaced relationship with respect to both sides of the board; the improvement comprising: the protective cover being formed from sheet metal and having an unfastened butt seam along its length; each of the end plates having a notch on an edge facing the seam; and the cover having inturned edges along the seam for engaging each notch so as to prevent separation of the seam.
Claim 2
Dependent Claim
108 words
In a printed circuit board assembly, comprising: a printed circuit board for mounting electrical components thereon; a pair of end plates affixed at opposed ends of the board; a tubular protective cover supported at its ends by the pair of end plates in spaced relationship with respect to both sides of the board; the improvement comprising: the protective cover being formed from sheet metal and having an unfastened butt seam along its length; each of the end plates having a notch on an edge facing the seam; and the cover having inturned edges along the seam for engaging each notch so as to prevent separation of the seam.
Claim 3
Dependent Claim
23 words
A printed circuit board assembly as defined in claim 1 in which the inturned edges of the seam are contiguous the notches only.
References Cited (Backward Citations)
US2682018A
Cited
US3300687A
Cited
US3349289A
Cited
US3506877A
Cited
US3566190A
Cited
US3808506A
Cited
US4138711A
Cited
DE2747894A1
Cited
US4295181A
Cited
US4300016A
Cited
US4215796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |