US5393928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielded cable assemblies
Assignee: Laird Technologies Inc
•
Filing: 1993-02-19
•
Granted: 1995-02-28
•
Expires: 2013-02-19
Abstract
Abstract Lower weight shielded cable assemblies with an enhanced level of shielding effectiveness, e.g. in the range of 0.1 MHz to 20 GHz, comprising a core of at least one insulated conductor element overwrapped with metallized fabric, e.g. characterized as having a surface resistivity less than 100 milliohms/square or as being a metallized fabric coated with at least a layer of copper having a metal density of greater than 50 grams/square meter. Cable assemblies can employ a shielding subassembly comprising braided wire and one or more layers of copper-metallized fabric where the shielding subassembly has a transfer impedance at 10 MHz of less than 50 mo/m. For example, it has been found that cable assemblies employing a four layer wrap of certain metallized fabrics can provide up to 20 decibels improvement in shielding effectiveness over a wide range of frequencies with a 74 percent reduction in weight compared to a standard wire braid/foil laminate shield.
Inventors
- 👤 Richard M. Cribb
- 👤 Arthur R. Henn
- 👤 Martin H. Wohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:09
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/02; H01B11/06; H01B11/10; H01B11/1033; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3398; Y10T442/3407; Y10T442/60; Y10T442/654; Y10T442/657
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
35 words
An elongated shielded cable assembly comprising a core of at least one insulated conductor element overwrapped with more than one layer of metallized fabric, wherein said fabric has a surface resistivity less than 100 milliohms/square.
Claim 2
Dependent Claim
35 words
An elongated shielded cable assembly comprising a core of at least one insulated conductor element overwrapped with more than one layer of metallized fabric, wherein said fabric has a surface resistivity less than 100 milliohms/square.
Claim 3
Dependent Claim
19 words
A shielded cable assembly according to claim 1 wherein said fabric has a surface resistivity less than 50 milliohms/square.
Claim 4
Dependent Claim
19 words
A shielded cable assembly according to claim 2 wherein said fabric has a surface resistivity less than 30 milliohms/square.
Claim 5
Dependent Claim
19 words
A shielded cable assembly according to claim 3 wherein said fabric has a surface resistivity less than 20 milliohms/square.
Claim 6
Dependent Claim
19 words
A shielded cable assembly according to claim 4 wherein said fabric has a surface resistivity less than 10 milliohms/square.
Claim 7
Dependent Claim
19 words
A shielded cable assembly according to claim 5 wherein said fabric has a surface resistivity less than 5 milliohms/square.
Claim 8
Dependent Claim
47 words
A shielded cable assembly comprising a core of at least one insulated conductor element overwrapped with more than one layer of metallized fabric, wherein said fabric is coated with at least a layer of copper having a metal density of greater than 50 grams per square meter.
Claim 9
Dependent Claim
47 words
A shielded cable assembly comprising a core of at least one insulated conductor element overwrapped with more than one layer of metallized fabric, wherein said fabric is coated with at least a layer of copper having a metal density of greater than 50 grams per square meter.
Claim 10
Dependent Claim
32 words
A shielded cable assembly according to claim 7 wherein said fabric is coated with at least a layer of copper having a metal density of greater than 70 grams per square meter.
Claim 11
Dependent Claim
32 words
A shielded cable assembly according to claim 8 wherein said fabric is coated with at least a layer of copper having a metal density of greater than 100 grams per square meter.
Claim 12
Dependent Claim
32 words
A shielded cable assembly according to claim 9 wherein said fabric is coated with at least a layer of copper having a metal density of greater than 200 grams per square meter.
Claim 13
Dependent Claim
32 words
A shielded cable assembly according to claim 10 wherein said fabric is coated with at least a layer of copper having a metal density of greater than 300 grams per square meter.
Claim 14
Dependent Claim
57 words
A shielded cable assembly comprising a core of at least one insulated conductor element overwrapped a shielding subassembly comprising braided wire exhibiting transfer-impedance of less than 50 milliohms/meter at 0.2 MHz and one or more layers of copper-metallized fabric selected so that the shielding subassembly has a transfer impedance at 10 MHz of less than 50 milliohms/meter.
Claim 15
Dependent Claim
57 words
A shielded cable assembly comprising a core of at least one insulated conductor element overwrapped a shielding subassembly comprising braided wire exhibiting transfer-impedance of less than 50 milliohms/meter at 0.2 MHz and one or more layers of copper-metallized fabric selected so that the shielding subassembly has a transfer impedance at 10 MHz of less than 50 milliohms/meter.
Claim 16
Dependent Claim
23 words
A shielded cable assembly according to claim 12 wherein said subassembly has a transfer impedance at 10 MHz of less than 25 milliohms/meter.
Claim 17
Dependent Claim
23 words
A shielded cable assembly according to claim 13 wherein said subassembly has a transfer impedance at 10 MHz of less than 10 milliohms/meter.
Claim 18
Dependent Claim
23 words
A shielded cable assembly according to claim 14 wherein said subassembly has a transfer impedance at 10 MHz of less than 5 milliohms/meter.
Claim 19
Dependent Claim
23 words
A shielded cable assembly according to claim 15 wherein said subassembly has a transfer impedance at 10 MHz of less than 2 milliohms/meter.
Claim 20
Dependent Claim
66 words
Metallized fabric having at least one layer of metal on a fibrous substrate, said fabric being selected from the group consisting of (a) woven fabric having a surface resistivity less than 20 milliohms/square, (b) non-woven fabric having a surface resistivity less than 50 milliohms/square and (c) woven or non-woven fabric having at least one layer of copper and a metal density greater than 50 grams/square meter.
Claim 21
Dependent Claim
66 words
Metallized fabric having at least one layer of metal on a fibrous substrate, said fabric being selected from the group consisting of (a) woven fabric having a surface resistivity less than 20 milliohms/square, (b) non-woven fabric having a surface resistivity less than 50 milliohms/square and (c) woven or non-woven fabric having at least one layer of copper and a metal density greater than 50 grams/square meter.
Claim 22
Dependent Claim
47 words
Metallized fabric according to claim 17 wherein said at least one layer of metal comprises a layer of copper coated with a layer of nickel, silver or tin and wherein said layer of copper is at least 25 percent by weight of the metal on said fabric.
Claim 23
Dependent Claim
23 words
A metallized fabric according to claim 17 wherein said fabric is a woven fabric having a surface resistivity of less than 10 milliohms/square.
Claim 24
Dependent Claim
23 words
A metallized fabric according to claim 19 wherein said fabric is a woven fabric having a surface resistivity of less than 5 milliohms/square.
Claim 25
Dependent Claim
23 words
A metallized fabric according to claim 18 wherein said fabric is a woven fabric having a surface resistivity of less than 10 milliohms/square.
Claim 26
Dependent Claim
23 words
A metallized fabric according to claim 21 wherein said fabric is a woven fabric having a surface resistivity of less than 5 milliohms/square.
Claim 27
Dependent Claim
23 words
A metallized fabric according to claim 17 wherein said fabric is a nonwoven fabric having a surface resistivity of less than 30 milliohms/square.
Claim 28
Dependent Claim
23 words
A metallized fabric according to claim 23 wherein said fabric is a nonwoven fabric having a surface resistivity of less than 20 milliohms/square.
Claim 29
Dependent Claim
23 words
A metallized fabric according to claim 24 wherein said fabric is a nonwoven fabric having a surface resistivity of less than 10 milliohms/square.
Claim 30
Dependent Claim
23 words
A metallized fabric according to claim 25 wherein said fabric is a nonwoven fabric having a surface resistivity of less than 5 milliohms/square.
Claim 31
Dependent Claim
23 words
A metallized fabric according to claim 18 wherein said fabric is a nonwoven fabric having a surface resistivity of less than 30 milliohms/square.
Claim 32
Dependent Claim
23 words
A metallized fabric according to claim 27 wherein said fabric is a nonwoven fabric having a surface resistivity of less than 20 milliohms/square.
Claim 33
Dependent Claim
23 words
A metallized fabric according to claim 28 wherein said fabric is a nonwoven fabric having a surface resistivity of less than 10 milliohms/square.
Claim 34
Dependent Claim
23 words
A metallized fabric according to claim 29 wherein said fabric is a nonwoven fabric having a surface resistivity of less than 5 milliohms/square.
Claim 35
Dependent Claim
26 words
A metallized fabric according to claim 17 wherein said fabric has at least one layer of copper and a metal density greater than 70 grams/square meter.
Claim 36
Dependent Claim
26 words
A metallized fabric according to claim 31 wherein said fabric has at least one layer of copper and a metal density greater than 100 grams/square meter.
Claim 37
Dependent Claim
26 words
A metallized fabric according to claim 32 wherein said fabric has at least one layer of copper and a metal density greater than 200 grams/square meter.
Claim 38
Dependent Claim
26 words
A metallized fabric according to claim 33 wherein said fabric has at least one layer of copper and a metal density greater than 300 grams/square meter.
References Cited (Backward Citations)
US3089915A
Cited
US3660138A
Cited
US3582532A
Cited
US3946143A
Cited
US4016356A
Cited
US4281211A
Cited
US4376229A
Cited
US4375009A
Cited
US4409427A
Cited
US4461076A
Cited
US4681591A
Cited
US4684762A
Cited
US4865892A
Cited
US4822950A
Cited
JPH0466725A
Cited
US5216202A
Cited
US5103067A
Cited
US5180884A
Cited
US5262592A
Cited
US5132490A
Cited
US5262591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-27 | 1998-08-29 | 1999-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-27 | 2002-08-29 | 2003-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-27 | 2006-08-29 | 2007-02-28 | $7700.00 | Window Closed / Lapsed |