US3688016A - Coaxial cable - Google Patents
Coaxial cable Download PDFInfo
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- US3688016A US3688016A US190514A US3688016DA US3688016A US 3688016 A US3688016 A US 3688016A US 190514 A US190514 A US 190514A US 3688016D A US3688016D A US 3688016DA US 3688016 A US3688016 A US 3688016A
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- United States
- Prior art keywords
- coaxial cable
- insulator
- flexible
- conductor
- cable according
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1834—Construction of the insulation between the conductors
- H01B11/1839—Construction of the insulation between the conductors of cellular structure
Definitions
- ABSTRACT A coaxial cable is described wherein a rigid expanded foam insulator fills the space between inner and outer conductors. Groove means are formed in the outer surface of the insulator to a depth sufficient to enable the insulator to flex with the inner and outer conductOI'S 8 Claims, 3 Drawing Figures PKTENTEDAUGZQIQIZ I 3 5 015 I- VENTOR ROBERT L. SPADE COAXIAL CABLE This invention relates to coaxial cables and, more particularly, to an improved coaxial cable which is easily manufactured and which has a low dielectric constant.
- a coaxial cable typically comprises at least one flexible inner conductor and at least one flexible outer conductor surrounding and coaxial with the inner conductor.
- the two conductors are separated by a suitable insulator.
- the outer conductor is grounded and serves as a shield for the information being conducted on the inner conductor, to prevent noise interference from ambient signals.
- the dielectric constant of a coaxial cable it is important to minimize the dielectric constant of a coaxial cable in order to reduce the capacitance of the cable.
- the dielectric constant of the cable that is, the dielectric constant of the insulating material separating the inner and outer conductors
- the overall diameter of the cable may be reduced, because the inner and outer conductors need not be separated by as great a distance for a given capacitance tolerance, or the electrical efficiency of the cable may be improved.
- Expanded polyethylene foam is capable of being expanded only by an amount which results in a limited low dielectric constant. Accordingly, expanded foam polyethylene and similar flexible expanded foam insulators are unsatisfactory for many coaxial cable applications.
- Another object of the invention is to provide a coaxial cable with a low dielectric constant which is capable of being manufactured easily.
- Another object of the invention is to provide a flexible coaxial cable with a low dielectric constant and a relatively small diameter and/or improved signal efficiency.
- FIG. 1 is a perspective view, with parts broken away, of a coaxial cable constructed in accordance with the invention
- FIG. 2 is a sectional view taken along the line 2-2 of FIG. 1;
- FIG. 3 is a perspective view, with parts broken away, of an alternative embodiment of the invention.
- the coaxial cable of the invention comprises at least one flexible inner conductor 11.
- a flexible outer conductor 12 surrounds and is coaxial with the inner conductor.
- a rigid expanded foam insulator 13 fills the space between the inner and outer conductors.
- the insulator has groove means 14 formed in the outer surface thereof to a depth sufficient to enable the insulator to flex with the inner and outer conductors. The groove means extend the length of the insulator.
- the inner conductor 11 is comprised of a plurality of individual parallel wire strands as is known in the art.
- the strands of the inner conductor 11 may be copper or other suitable flexible conductive materials such as copper plus another material (e.g. aluminum).
- the outer conductor or shield 12 surrounds and is coaxial with the inner conductor.
- the outer conductor or shield 12 comprises a flexible braid of fine copper wires or other suitable flexible conductive materials.
- the outer conductor 12 provides shielding for the inner conductor 11 as is known in the art.
- the insulator 13 is provided filling the space between the inner and outer conductors.
- the insulator 13 is comprised of a rigid expanded foam material, such as expanded polystyrene. Due to the strength or rigidity of rigid foamed material, rigid materials can provide larger cells so that the air or gas space volume of solid material is far greater than in softer flexible foamed material. According y, the diameter of the outer conductor 12 may be substantially less for a given cable capacitance than in the case of flexible expanded foams.
- the insulator is provided with groove means 14 formed in the outer surface thereof to a depth sufficient to enable the insulator to flex along with the inner and outer conductors.
- the depth to which the groove means are formed is preferably approximately half-way between the inner conductor 11 and the outer conductor 12 but may be more or less in depth.
- the groove means comprise a single helical groove which extends the full length of the insulator 13. As may be seen in FIG. 2, the groove extends about half-way through the insulator and may be formed with square or rounded corners. In the illustrated embodiment, rounded corners are shown both at the upper surface and at the bottom of the groove. Other configurations of the groove means are also possible, such as a plurality of annular grooves spaced axially along the insulator. In any case, the groove means extend the length of the cable so that the cable is sufficiently flexible.
- the groove means 14 may be formed in the insulator 13 by any suitable means.
- the groove may be formed as the insulator is extruded (by known extrusion techniques) by utilizing a rotating die or wire cutter as it is extruded.
- the groove means are formed by a hot wire so that the plastic melts and fuses at the cut to produce a rounded bottom and corners.
- a final outer sheath 15 of insulation may be provided.
- the insulation 15, however, is shown in FIG. 1 only for the purposes of illustration, and is not a necessary requirement in a cable constructed in accordance with the invention.
- FIG. 3 an alternative embodiment of the invention is illustrated.
- the central conductor 111 (shown as a solid conductor in FIG. 3) is separated from an outer sheath or outer conductor 112 by an insulator 113.
- the insulator in FIG. 3 is identical with the insulator in FIG. 1, and is provided with a helical groove 114 therein for flexibility.
- the outer conductor in the embodiment of FIG. 3 comprises a helically wrapped metal foil rather than a braid. To assist in grounding the foil, up to four drain wires 116 are provided running the length of the cable is completed by an outer surrounding sheath 115 of a suitable insulating material.
- the coaxial cable of the invention is readily manufactured, since the cable may be formed coincident with the extrusion of the expanded foam insulator.
- the helical groove means may be formed in the insulator at the time it is extruded.
- a very low dielectric constant is obtainable by utilizing rigid expanded foam insulation, and the cable of the invention is capable of flexing with the flexible inner and outer conductors due to the groove means formed in the outer surface of the insulator.
- a coaxial cable comprising, at least one flexible inner conductor, at least one flexible outer conductor surrounding and coaxial with said inner conductor, and a rigid expanded foam insulator filling the space between said inner and outer conductors, said insulator having groove means formed in the outer surface thereof to a depth sufficient to enable said insulator to flex with said inner and outer conductors, said groove means extending the length of said insulator.
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Abstract
A coaxial cable is described wherein a rigid expanded foam insulator fills the space between inner and outer conductors. Groove means are formed in the outer surface of the insulator to a depth sufficient to enable the insulator to flex with the inner and outer conductors.
Description
United States Patent Spade [451 Aug. 29, 1972 [54] COAXIAL CABLE [72] Inventor: Robert L. Spade, St. Charles, 111.
[73] Assignee: Belden Corporation, Chicago, Ill.
[22] Filed: Oct. 19, 1971 [21] Appl. No.: 190,514
[52] U.S. Cl. ..174/36, 174/28, 174/107,
174/110 F, 174/110 SY [51] Int. Cl. ..H0lb 11/18 [58] Field of Search...174/28, 29, 110 F, 107, 102 R, 174/102 D, 27, 36,115,110 SY [56] References Cited UNITED STATES PATENTS 3,315,025 4/ 1967 Tomlinson ..174/ 107 3,309,458 3/1967 Masamiciyoshimura et al 174/107 2,140,270 12/1938 Potter ..174/107 X 1,050,250 1/1913 Tanner et al. .,174/107 3,639,674 2/ 1972 Stier 1 74/36 FOREIGN PATENTS OR APPLICATIONS 1,255,743 1/l96l France ..174/110 SY 734,161 7/1955 Great Britain ..l74/28 Primary Examiner-Lewis I-I. Myers Assistant Examiner-A. T. Grimley Attorney-William E. Anderson, et al.
[57] ABSTRACT A coaxial cable is described wherein a rigid expanded foam insulator fills the space between inner and outer conductors. Groove means are formed in the outer surface of the insulator to a depth sufficient to enable the insulator to flex with the inner and outer conductOI'S 8 Claims, 3 Drawing Figures PKTENTEDAUGZQIQIZ I 3 5 015 I- VENTOR ROBERT L. SPADE COAXIAL CABLE This invention relates to coaxial cables and, more particularly, to an improved coaxial cable which is easily manufactured and which has a low dielectric constant.
Coaxial cables are useful in many electrical applications, particularly for transmitting high frequencies. A coaxial cable typically comprises at least one flexible inner conductor and at least one flexible outer conductor surrounding and coaxial with the inner conductor. The two conductors are separated by a suitable insulator. The outer conductor is grounded and serves as a shield for the information being conducted on the inner conductor, to prevent noise interference from ambient signals.
In many instances, it is important to minimize the dielectric constant of a coaxial cable in order to reduce the capacitance of the cable. By minimizing the dielectric constant of the cable, that is, the dielectric constant of the insulating material separating the inner and outer conductors, the overall diameter of the cable may be reduced, because the inner and outer conductors need not be separated by as great a distance for a given capacitance tolerance, or the electrical efficiency of the cable may be improved.
Flexible expanded plastic foam insulators, such as explanded polyethylene foam, have been used in many instances as insulators in coaxial cables. Expanded polyethylene foam, however, is capable of being expanded only by an amount which results in a limited low dielectric constant. Accordingly, expanded foam polyethylene and similar flexible expanded foam insulators are unsatisfactory for many coaxial cable applications.
Some alternative forms of coaxial cable insulation which have been proposed are a series of ceramic or plastic washers as the insulating material separating the inner and outer conductors. By spacing the washers sufficiently, the cable is able to flex. Such washers are, however, very difficult to install, and substantially increase the manufacturing cost of coaxial cable.
It is an object of the present invention to provide an improved coaxial cable.
Another object of the invention is to provide a coaxial cable with a low dielectric constant which is capable of being manufactured easily.
Another object of the invention is to provide a flexible coaxial cable with a low dielectric constant and a relatively small diameter and/or improved signal efficiency.
Other objects of the invention will become apparent to those skilled in the art from the following description, taken in connection with the accompanying drawings wherein:
FIG. 1 is a perspective view, with parts broken away, of a coaxial cable constructed in accordance with the invention;
FIG. 2 is a sectional view taken along the line 2-2 of FIG. 1; and
FIG. 3 is a perspective view, with parts broken away, of an alternative embodiment of the invention.
Very generally, the coaxial cable of the invention comprises at least one flexible inner conductor 11. A flexible outer conductor 12 surrounds and is coaxial with the inner conductor. A rigid expanded foam insulator 13 fills the space between the inner and outer conductors. The insulator has groove means 14 formed in the outer surface thereof to a depth sufficient to enable the insulator to flex with the inner and outer conductors. The groove means extend the length of the insulator.
Referring now more particularly to FIG. 1, the embodiment of the invention illustrated therein comprises a single flexible inner conductor 11. The inner conductor 11 is comprised of a plurality of individual parallel wire strands as is known in the art. The strands of the inner conductor 11 may be copper or other suitable flexible conductive materials such as copper plus another material (e.g. aluminum).
The outer conductor or shield 12 surrounds and is coaxial with the inner conductor. In the illustrated embodiment, the outer conductor or shield 12 comprises a flexible braid of fine copper wires or other suitable flexible conductive materials. The outer conductor 12 provides shielding for the inner conductor 11 as is known in the art.
In order to maintain separation between the outer conductor 12 and the inner conductor 11, the insulator 13 is provided filling the space between the inner and outer conductors. In accordance with the invention, the insulator 13 is comprised of a rigid expanded foam material, such as expanded polystyrene. Due to the strength or rigidity of rigid foamed material, rigid materials can provide larger cells so that the air or gas space volume of solid material is far greater than in softer flexible foamed material. According y, the diameter of the outer conductor 12 may be substantially less for a given cable capacitance than in the case of flexible expanded foams.
Because rigid expanded foam is relatively inflexible, the insulator is provided with groove means 14 formed in the outer surface thereof to a depth sufficient to enable the insulator to flex along with the inner and outer conductors. The depth to which the groove means are formed is preferably approximately half-way between the inner conductor 11 and the outer conductor 12 but may be more or less in depth. In the illustrated embodiment, the groove means comprise a single helical groove which extends the full length of the insulator 13. As may be seen in FIG. 2, the groove extends about half-way through the insulator and may be formed with square or rounded corners. In the illustrated embodiment, rounded corners are shown both at the upper surface and at the bottom of the groove. Other configurations of the groove means are also possible, such as a plurality of annular grooves spaced axially along the insulator. In any case, the groove means extend the length of the cable so that the cable is sufficiently flexible.
The groove means 14 may be formed in the insulator 13 by any suitable means. For example, in the case of the helical groove illustrated, the groove may be formed as the insulator is extruded (by known extrusion techniques) by utilizing a rotating die or wire cutter as it is extruded. Preferably, the groove means are formed by a hot wire so that the plastic melts and fuses at the cut to produce a rounded bottom and corners.
In some cases, a final outer sheath 15 of insulation may be provided. The insulation 15, however, is shown in FIG. 1 only for the purposes of illustration, and is not a necessary requirement in a cable constructed in accordance with the invention.
Referring now to FIG. 3, an alternative embodiment of the invention is illustrated. Portions of the coaxial cable illustrated in FIG. 3 corresponding generally to portions of the coaxial cable of FIGS. 1 and 2 have been given identical reference numerals, preceded by a 1. Thus, the central conductor 111 (shown as a solid conductor in FIG. 3) is separated from an outer sheath or outer conductor 112 by an insulator 113. The insulator in FIG. 3 is identical with the insulator in FIG. 1, and is provided with a helical groove 114 therein for flexibility. The outer conductor in the embodiment of FIG. 3 comprises a helically wrapped metal foil rather than a braid. To assist in grounding the foil, up to four drain wires 116 are provided running the length of the cable is completed by an outer surrounding sheath 115 of a suitable insulating material.
The coaxial cable of the invention is readily manufactured, since the cable may be formed coincident with the extrusion of the expanded foam insulator. The helical groove means may be formed in the insulator at the time it is extruded. A very low dielectric constant is obtainable by utilizing rigid expanded foam insulation, and the cable of the invention is capable of flexing with the flexible inner and outer conductors due to the groove means formed in the outer surface of the insulator.
Various modifications of the invention in addition to those shown and described herein will become apparent to those skilled in the art from the foregoing description and accompanying drawings. Such modifications are intended to fall within the scope of the appended claims.
What is claimed is:
1. A coaxial cable comprising, at least one flexible inner conductor, at least one flexible outer conductor surrounding and coaxial with said inner conductor, and a rigid expanded foam insulator filling the space between said inner and outer conductors, said insulator having groove means formed in the outer surface thereof to a depth sufficient to enable said insulator to flex with said inner and outer conductors, said groove means extending the length of said insulator.
2. A coaxial cable according to claim 1 wherein said groove means comprise a single helical groove.
3. A coaxial cable according to claim 2 wherein the depth of said helical groove is over half the distance between said inner and outer conductors.
4. A coaxial cable according to claim 1 wherein the bottom of said groove means is rounded.
5. A coaxial cable according to claim 1 wherein said outer conductor comprises a flexible braid.
6. A coaxial cable according to claim 1 wherein said outer conductor comprises a flexible foil.
7. A coaxial cable according to claim 1 wherein said outer conductor is surrounded by an outer layer of flexible insulation.
8. A coaxial cable according to claim 1 wherein a plurality of drain wires are provided extending the length of the cable in contact with said outer conductor.
UNITED STATES PATENT OFFICE CERTIFICATE OF" CORRECTION Patent No. 3,688,016 Dated August 29, 1972 Invento'r(s) Robert L. Spade It is certified that error appears in the above-identified pateht 'and that said Letters Patentare hereby corrected as shown below:
Column 3, I line 17 after "cable" insert "on the outer I I surface of t'he'outer conductor 112.
The cable".
Signed and sealed this 13th day of February 1973.
(SEAL) Attest:
EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents FORM PO-1050(10-69) USCOMM-DC 60376-1 69 i U.S. GOVERNMENT PRINTING OFFICE: [989 O-S66-33l.
UNITED STATES PATENT OFFICE CERTIFICATE ()F' CORRECTION Patent No. 3,688,016 Dated August 29, 1972 Inventor(s) Robert L. Spade It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
Column 3, line 17 after "cable" insert "on the outer surface of the'ou'ter conductor 11.2.
The cable".
Signed and sealed this 13th day of February 1973.
(SEAL) Attest: I
EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents FORM PO-1050 (10-69) usco c 0 75 p 9 [1.5. GOVERNMENT PRINTING OFFICE 1 I969 356-334
Claims (8)
1. A coaxial cable comprising, at least one flexible inner conductor, at least one flexible outer conductor surrounding and coaxial with said inner conductor, and a rigid expanded foam insulator filling the space between said inner and outer conductors, said insulator having groove means formed in the outer surface thereof to a depth sufficient to enable said insulator to flex with said inner and outer conductors, said groove means extending the length of said insulator.
2. A coaxial cable according to claim 1 wherein said groove means comprise a single helical groove.
3. A coaxial cable according to claim 2 wherein the depth of said helical groove is over half the distance between said inner and outer conductors.
4. A coaxial cable according to claim 1 wherein the bottom of said groove means is rounded.
5. A coaxial cable according to claim 1 wherein said outer conductor comprises a flexible braid.
6. A coaxial cable according to claim 1 wherein said outer conductor comprises a flexible foil.
7. A coaxial cable according to claim 1 wherein said outer conductor is surrounded by an outer layer of flexible insulation.
8. A coaxial cable according to claim 1 wherein a plurality of drain wires are provided extending the length of the cable in contact with said outer conductor.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19051471A | 1971-10-19 | 1971-10-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3688016A true US3688016A (en) | 1972-08-29 |
Family
ID=22701657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US190514A Expired - Lifetime US3688016A (en) | 1971-10-19 | 1971-10-19 | Coaxial cable |
Country Status (2)
Country | Link |
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US (1) | US3688016A (en) |
CA (1) | CA970853A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3917898A (en) * | 1971-10-22 | 1975-11-04 | Showa Electric Wire & Cable Co | Water-cooled cable |
US4011118A (en) * | 1974-05-21 | 1977-03-08 | U.S. Philips Corporation | Method of manufacturing a coaxial cable, and coaxial cable made by this method |
US4170510A (en) * | 1978-01-30 | 1979-10-09 | General Cable Corporation | Apparatus and method for assembling communications cable containing fiber optic conductors |
US4645868A (en) * | 1984-04-18 | 1987-02-24 | Junkosha Company, Ltd. | Electrical transmission line |
US4649228A (en) * | 1984-04-18 | 1987-03-10 | Junkosha Co., Ltd. | Transmission line |
EP0227268A2 (en) * | 1985-11-15 | 1987-07-01 | Junkosha Co. Ltd. | Transmission line |
EP0436489A1 (en) * | 1990-01-02 | 1991-07-10 | Vyskumny Ustav Kablov A Izolantov Statny Podnik | Coaxial cable |
US5831215A (en) * | 1994-08-02 | 1998-11-03 | Alcatel Kabel Ag & Co. | High frequency coaxial cable |
US5926949A (en) * | 1996-05-30 | 1999-07-27 | Commscope, Inc. Of North Carolina | Method of making coaxial cable |
US6060663A (en) * | 1998-09-10 | 2000-05-09 | Lear Automotive Dearborn, Inc. | Foam wire harness with non-continuous convolutes |
US20130183177A1 (en) * | 2012-01-16 | 2013-07-18 | Schlumberger Technology Corporation | Tubing Encased Motor Lead |
US20180322987A1 (en) * | 2017-05-08 | 2018-11-08 | International Business Machines Corporation | Bulk wire bend radius manager |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1050250A (en) * | 1910-04-08 | 1913-01-14 | Albert Edgar Tanner | Alternating-current cable distributing system. |
US2140270A (en) * | 1934-12-01 | 1938-12-13 | Gen Cable Corp | Electric cable |
GB734161A (en) * | 1952-09-15 | 1955-07-27 | Siemens Ag | Improvements relating to high-frequency multi-layer conductors consisting of alternate thin layers of metal and insulation |
FR1255743A (en) * | 1960-04-29 | 1961-03-10 | Int Standard Electric Corp | Improvements in the manufacture of insulated electrical conductors |
US3309458A (en) * | 1966-03-01 | 1967-03-14 | Fujikura Ltd | Coaxial cable with foamed resin dielectric bound by a thin film of solid resin dielectric |
US3315025A (en) * | 1964-12-30 | 1967-04-18 | Anaconda Wire & Cable Co | Electric cable with improved resistance to moisture penetration |
US3639674A (en) * | 1970-06-25 | 1972-02-01 | Belden Corp | Shielded cable |
-
1971
- 1971-10-19 US US190514A patent/US3688016A/en not_active Expired - Lifetime
-
1972
- 1972-08-15 CA CA149,478A patent/CA970853A/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1050250A (en) * | 1910-04-08 | 1913-01-14 | Albert Edgar Tanner | Alternating-current cable distributing system. |
US2140270A (en) * | 1934-12-01 | 1938-12-13 | Gen Cable Corp | Electric cable |
GB734161A (en) * | 1952-09-15 | 1955-07-27 | Siemens Ag | Improvements relating to high-frequency multi-layer conductors consisting of alternate thin layers of metal and insulation |
FR1255743A (en) * | 1960-04-29 | 1961-03-10 | Int Standard Electric Corp | Improvements in the manufacture of insulated electrical conductors |
US3315025A (en) * | 1964-12-30 | 1967-04-18 | Anaconda Wire & Cable Co | Electric cable with improved resistance to moisture penetration |
US3309458A (en) * | 1966-03-01 | 1967-03-14 | Fujikura Ltd | Coaxial cable with foamed resin dielectric bound by a thin film of solid resin dielectric |
US3639674A (en) * | 1970-06-25 | 1972-02-01 | Belden Corp | Shielded cable |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3917898A (en) * | 1971-10-22 | 1975-11-04 | Showa Electric Wire & Cable Co | Water-cooled cable |
US4011118A (en) * | 1974-05-21 | 1977-03-08 | U.S. Philips Corporation | Method of manufacturing a coaxial cable, and coaxial cable made by this method |
US4170510A (en) * | 1978-01-30 | 1979-10-09 | General Cable Corporation | Apparatus and method for assembling communications cable containing fiber optic conductors |
US4645868A (en) * | 1984-04-18 | 1987-02-24 | Junkosha Company, Ltd. | Electrical transmission line |
US4649228A (en) * | 1984-04-18 | 1987-03-10 | Junkosha Co., Ltd. | Transmission line |
EP0227268A3 (en) * | 1985-11-15 | 1988-07-06 | Junkosha Co. Ltd. | Transmission line |
EP0227268A2 (en) * | 1985-11-15 | 1987-07-01 | Junkosha Co. Ltd. | Transmission line |
EP0436489A1 (en) * | 1990-01-02 | 1991-07-10 | Vyskumny Ustav Kablov A Izolantov Statny Podnik | Coaxial cable |
US5831215A (en) * | 1994-08-02 | 1998-11-03 | Alcatel Kabel Ag & Co. | High frequency coaxial cable |
US5926949A (en) * | 1996-05-30 | 1999-07-27 | Commscope, Inc. Of North Carolina | Method of making coaxial cable |
US5959245A (en) * | 1996-05-30 | 1999-09-28 | Commscope, Inc. Of North Carolina | Coaxial cable |
US6137058A (en) * | 1996-05-30 | 2000-10-24 | Commscope, Inc. Of North Carolina | Coaxial cable |
US6060663A (en) * | 1998-09-10 | 2000-05-09 | Lear Automotive Dearborn, Inc. | Foam wire harness with non-continuous convolutes |
US20130183177A1 (en) * | 2012-01-16 | 2013-07-18 | Schlumberger Technology Corporation | Tubing Encased Motor Lead |
US20180322987A1 (en) * | 2017-05-08 | 2018-11-08 | International Business Machines Corporation | Bulk wire bend radius manager |
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Legal Events
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AS | Assignment |
Owner name: COOPER INDUSTRIES, INC., 1001 FANNIN, HOUSTON, TX. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BELDEN CORPORATION;REEL/FRAME:004110/0218 Effective date: 19830223 |