US5225629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snap-in EMI contact associated with a digital computer
Assignee: Dell USA LP
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Filing: 1991-12-13
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Granted: 1993-07-06
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Expires: 2011-12-13
Abstract
Abstract To reduce the electro-magnetic interference (EMI) of a digital computer, the EMI contact of this invention is snapped into place in the chassis of the computer and the cover for the computer is then placed over the chassis with the contact surfaces of the EMI contact firmly engaging the cover to provide grounding between the cover and the chassis, thereby reducing EMI.
Inventors
- 👤 Robert H. Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:02
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/16; G06F1/18; G06F1/181; G06F1/182; H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; H05K9/0016
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A digital computer, comprising: (a) a chassis, having at least one contact aperture and a retaining fixture; (b) a cover, fitting over the chassis; and (c) at least one electro-magnetic interference (EMI) contact, having a retaining clip for engaging the retaining fixture, and a contact surface that protrudes through the contact aperture and contacts the cover, to provide grounding between the cover and the chassis, thereby reducing EMI.
Claim 2
Dependent Claim
68 words
A digital computer, comprising: (a) a chassis, having at least one contact aperture and a retaining fixture; (b) a cover, fitting over the chassis; and (c) at least one electro-magnetic interference (EMI) contact, having a retaining clip for engaging the retaining fixture, and a contact surface that protrudes through the contact aperture and contacts the cover, to provide grounding between the cover and the chassis, thereby reducing EMI.
Claim 3
Dependent Claim
18 words
The computer of claim 1 wherein the chassis comprises a bottom surface and at least one side wall.
Claim 4
Dependent Claim
25 words
The computer of claim 2 wherein the retaining fixture comprises a retaining aperture in the side wall and a retaining aperture in the bottom surface.
Claim 5
Dependent Claim
37 words
The computer of claim 3 wherein the retaining clip comprises a first tab for insertion into the retaining aperture in the side wall, and a second tab for insertion into the retaining aperture in the bottom surface.
Claim 6
Dependent Claim
18 words
The computer of claim 4 wherein the chassis has two contact apertures, both located in the side wall.
Claim 7
Dependent Claim
24 words
The computer of claim 5 wherein the EMI contact has two contact surfaces, protruding through the two contact apertures, respectively, and contacting the cover.
Claim 8
Dependent Claim
16 words
The computer of claim 6 wherein the EMI contact is made of a resilient, conductive material.
Claim 9
Dependent Claim
16 words
The computer of claim 6 wherein the EMI contact is formed of a metallic spring material.
Claim 10
Dependent Claim
30 words
The computer of claim 8 wherein each of the two contact surfaces is formed in a convex arc to allow easy sliding of the cover into position over the chassis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |