US5147694A
Expired / Lapsed
US
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Electromagnetic shielding panel
Assignee: Pilkington Group Ltd
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Filing: 1990-08-06
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Granted: 1992-09-15
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Expires: 2010-08-06
Abstract
Abstract An electromagnetic shielding panel incorporates at least two electroconductive coatings. In two of the panels the coatings are carried on separate sheets of float glass one of the coatings being an anti-abrasive coating is on the outermost surface of the glass in the panel arrangement while the other coating being a relatively soft abrasive-sensitive coating, e.g. silver, is on the innermost of the glass in the panel arrangements. In other panel arrangements the two coatings are located on opposing sides of one glass sheet and in two of the panels a plain sheet of float glass is employed to protect the soft silver coating. In another panel a sheet of glass carrying an anti-abrasive coating is employed. The panels are of the double glazed and the laminated type. This invention utilizes the enhanced capacitive coupling between the two coatings to effectively earth the innermost silver coating by way of the anti-abrasive coating without any direct electrical connection being required to be made to the innermost coating.
Inventors
- 👤 Leslie T. Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:50
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B32B17/10009; B32B17/10036; B32B17/10045; B32B17/10055; B32B17/10165; B32B17/10174; B32B17/10293; B32B17/10302; B32B27/00; B32B27/06; B32B27/08; E; E06; E06B; E06B5/00; E06B5/10; E06B5/18; H; H05; H05K; H05K9/00; H05K9/0001; H05K9/0005; B32B2307/00; B32B2307/20; B32B2307/212; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31525; Y10T428/31529
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
151 words
An electromagnetic shielding panel comprising in combination; first and second panes, each independent, of glass or plastics said first and second panes each having major inner and outer surfaces thereof, and being positioned in opposed spaced parallel relationship; and, first and second electroconductive coatings, said first electroconductive coating being located on the major outer surface of the first pane of glass or plastics and the second electroconductive coating being located between the first and second panes of glass or plastics, wherein the second electroconductive coating is electrically coupled to the first electroconductive coating so that, in use of the shielding panel, direct electrical connection to the first electroconductive coating to enable said first electroconductive coating to be connected to earth also provides for the connection of the second electroconductive coating to earth to provide effective attenuation of electromagnetic radiation in the path of the shielding panel while providing good optical qualities.
Claim 2
Dependent Claim
151 words
An electromagnetic shielding panel comprising in combination; first and second panes, each independent, of glass or plastics said first and second panes each having major inner and outer surfaces thereof, and being positioned in opposed spaced parallel relationship; and, first and second electroconductive coatings, said first electroconductive coating being located on the major outer surface of the first pane of glass or plastics and the second electroconductive coating being located between the first and second panes of glass or plastics, wherein the second electroconductive coating is electrically coupled to the first electroconductive coating so that, in use of the shielding panel, direct electrical connection to the first electroconductive coating to enable said first electroconductive coating to be connected to earth also provides for the connection of the second electroconductive coating to earth to provide effective attenuation of electromagnetic radiation in the path of the shielding panel while providing good optical qualities.
Claim 3
Dependent Claim
47 words
An electromagnetic shielding panel as claimed in claim 1, wherein the second electroconductive coating is located on the major inner surface of the first pane of glass or plastics opposite the first electroconductive coating and the second pane of glass or plastics comprises clear glass or plastics.
Claim 4
Dependent Claim
56 words
An electromagnetic shielding panel as claimed in claim 1, wherein the second electroconductive coating is located on the major inner surface of the first pane of glass or plastics opposite the first electroconductive coating and the second pane of glass or plastics comprises coated glass having a coating corresponding to that of the first electroconductive coating.
Claim 5
Dependent Claim
29 words
An electromagnetic shielding panel as claimed in claim 1, wherein the second electroconductive coating is located on the major inner surface of the second pane of glass or plastics.
Claim 6
Dependent Claim
31 words
An electromagnetic shielding panel as claimed in claim 1, wherein the shielding panel is a double glazed panel incorporating an air or gas space between the panes of glass or plastics.
Claim 7
Dependent Claim
24 words
An electromagnetic shielding panel as claimed in claim 5, wherein the air or gas space is in the range 6 mm to 20 mm.
Claim 8
Dependent Claim
18 words
An electromagnetic shielding panel as claimed in claim 5, wherein the air or gas space is 12 mm.
Claim 9
Dependent Claim
27 words
An electromagnetic shielding panel as claimed in claim 1, wherein the shielding panel is a laminate incorporating a plastics interlayer between the panes of glass or plastics.
Claim 10
Dependent Claim
22 words
An electromagnetic shielding panel as claimed in claim 8, wherein the plastics interlayer has a thickness between 0.38 mm and 1 mm.
Claim 11
Dependent Claim
19 words
An electromagnetic shielding panel as claimed in claim 8, wherein the plastics interlayer has a thickness of 0.5 mm.
Claim 12
Dependent Claim
19 words
An electromagnetic shielding panel as claimed in claim 1, wherein the first electroconductive coating comprises a transparent abrasion-resistant coating.
Claim 13
Dependent Claim
20 words
An electromagnetic shielding panel as claimed in claim 11, wherein the transparent abrasion resistant coating comprises a semiconductor metal oxide.
Claim 14
Dependent Claim
19 words
An electromagnetic shielding panel as claimed in claim 12, wherein the semiconductor metal oxide comprises tin doped indium oxide.
Claim 15
Dependent Claim
18 words
An electromagnetic shielding panel as claimed in claim 12, wherein the semiconductor metal oxide comprises doped tin oxide.
Claim 16
Dependent Claim
23 words
An electromagnetic shielding panel as claimed in claim 12, wherein the semiconductor metal oxide comprises fluorine doped tin oxide produced by pyrolytic techniques.
Claim 17
Dependent Claim
25 words
An electromagnetic shielding panel as claimed in claim 11, wherein the thickness of the transparent abrasion resistant coating is between 150 nm and 1000 nm.
Claim 18
Dependent Claim
30 words
An electromagnetic shielding panel as claimed in any one preceding claim 1, wherein the second electroconductive coating is a silver layer having a thickness between 10 nm and 50 nm.
Claim 19
Dependent Claim
27 words
An electromagnetic shielding panel as claimed in claim 1, wherein the the second electroconductive coating is a silver layer having a thickness of at least 10 nm.
Claim 20
Dependent Claim
26 words
An electromagnetic shielding panel as claimed in claim 1, wherein the second electroconductive coating is a silver layer having a thickness of at least 15 nm.
Claim 21
Dependent Claim
26 words
An electromagnetic shielding panel as claimed in claim 1, wherein the second electroconductive coating is a silver layer having a thickness of at least 22.5 nm.
Claim 22
Dependent Claim
21 words
An electromagnetic shielding panel as claimed in claim 1, wherein the silver layer is sandwiched between anti-reflection layers of metal oxide.
Claim 23
Dependent Claim
18 words
An electromagnetic shielding panel as claimed in claim 21, wherein the anti-reflection layers comprise layers of tin oxide.
Claim 24
Dependent Claim
26 words
An electromagnetic shielding panel as claimed in claim 22 wherein each tin oxide anti-reflection layer has a thickness in the range 30 nm to 50 nm.
Claim 25
Dependent Claim
28 words
An electromagnetic shielding panel as claimed in claim 1, wherein the shielding panel is supported in an electrically conductive support in means which is electrically connectable to earth.
Claim 26
Dependent Claim
44 words
An electromagnetic shielding panel as claimed in claim 24, wherein a direct physical electrical connection is made from the first electroconductive coating to the support means by means of peripheral electrically-conductive compressible means sandwiched between the first electrically conductive coating and the support means.
Claim 27
Dependent Claim
21 words
An electromagnetic shielding panel as claimed in claim 25, wherein the electrically conductive compressible means comprises a metal loaded rubber gasket.
Claim 28
Dependent Claim
20 words
An electromagnetic shielding panel as claimed in claim 25, wherein the electrically conductive compressible means comprises a metal mesh gasket.
Claim 29
Dependent Claim
40 words
An electromagnetic shielding panel as claimed in claim 1, wherein the second electroconductive coating is electrically coupled to the first electroconductive coating by capacitive means, said capacitive means comprising distributed internal capacitance present between the first and second electroconductive coatings.
Claim 30
Dependent Claim
32 words
An electromagnetic shielding panel as claimed in claim 1, wherein the panel serves as a light translucent shield against electromagnetic radiation having a frequency in the range 30 MHz to 20 GHz.
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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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |