CN1237282A - Aerially installed communications cable - Google Patents
Aerially installed communications cable Download PDFInfo
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- CN1237282A CN1237282A CN98801192A CN98801192A CN1237282A CN 1237282 A CN1237282 A CN 1237282A CN 98801192 A CN98801192 A CN 98801192A CN 98801192 A CN98801192 A CN 98801192A CN 1237282 A CN1237282 A CN 1237282A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
- H02G7/06—Suspensions for lines or cables along a separate supporting wire, e.g. S-hook
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
Abstract
A communications cable is provided having a support strand (32) and at least one coaxial cable (34) helically wound around the support strand. The coaxial cable includes an inner conductor (40), a dielectric (42) surrounding the inner conductor, an outer tubular metallic sheath (44) surrounding the dielectric, and optionally a protective jacket (46) surrounding the metallic sheath. The communications cable is manufactured such that the ratio of the length of coaxial cable to the length of support strand is between about 1.005 and 1.015. The communications cable is also preferably wound around the support strand using a varying lay length thereby minimizing signal loss due to cable damage. The communications cable of the invention is especially suitable for aerial installation and may be installed in one pass, without the need to form expansion loops in the coaxial cable.
Description
The present invention relates to a kind of telecommunication cable, more particularly, relate to a kind of aerial installation that is suitable for transmitting the telecommunication cable of RF (radio frequency) signal.
The current coaxial cable that is used to transmit the RF signal that generally uses comprises inner wire, parcel inner wire and as the metal sheath of outer conductor and the protective layer that can select the coated metal crust that uses.One insulating barrier parcel inner wire makes its outer metal sheath electric insulation of inner wire and parcel.For example, adopt in the construction of cable expanded foam insulating barrier parcel inner wire and fill inner wire with its metal sheath outward of parcel between the space.In another structure, the air insulating layer that is used with dish type polymer pad is used for the centre of support lead separates it with outer conductor on spatial distribution.
A common purposes of the coaxial cable of these types is trunk and the branch cables that are used as sound, data and image transmission.Coaxial trunk and branch cable are often aloft installed, such as being suspended between the common pole.The problem that will be concerned about is the ubiquitous limited bending property of coaxial cable when coaxial cable is installed, and this is the characteristics of coaxial cable.Especially must be carefully when coaxial cable is installed avoiding in coaxial cable, occurring curling or crooked, because anyly such curl or crookedly all will influence the signal transmission performance of cable nocuously.These curl or crooked also may the repetition in the variations in temperature owing to seasonal and every day becomes the position that the construction of cable destroys after thermal expansion and the contraction circulation.
Shown in Fig. 1-4, the conventional method of installation aerial cable is a time taking process normally.Typically as shown in Figure 1, at first be fixed on rope on the common pole 12 and pass pulley 14 or supporting rope 10 or " messenger cable " are installed on the next common pole 16 by other method.Then, as shown in Figure 2, utilize the pulley 20 that dangles from supporting rope or other device to draw coaxial cable so that coaxial cable 18 is installed along the length direction of supporting rope 10.Then, as shown in Figure 3 and Figure 4, by the coaxial cable lash or be banded on the supporting rope coaxial cable 18 is fixed on the supporting rope 10.At the position spaced place, coaxial cable is formed expansion loop 24, as shown in Figure 4, and to adapt to expansion and the contraction that produces along with the variations in temperature of season and every day.In conventional installation method, a lot of steps must be carried out so that aerial fixing communication cable.
Another kind method is that coaxial cable and supporting rope or messenger cable and suspension strut rope and coaxial cable in same step are provided in same protective layer.Yet this special structure still requires to form the independent step of expansion loop with accommodate thermal expansion.
Although expansion loop can fully solve the problem of thermal expansion and contraction, a lot of and the relevant problem of use expansion loop have appearred.For example, expansion loop is bent many times in the useful life of cable, the result, and the stress concentration of local in expansion loop causes the part cable failure at the expansion loop place, has influenced the part transmission signals thus at least.The trend that expansion loop lost efficacy makes and is necessary earlier to change cable.In addition, the necessary when mounted expansion loop that forms by hand just produces be harmful to curling or crooked easily in cable.And, as mentioned above, be formed on during installation that expansion loop is very consuming time in the coaxial cable.
The invention provides and a kind ofly need not expansion loop and can be through the telecommunication cable of expanded by heating and contraction.Telecommunication cable of the present invention in addition is single unit, and therefore telecommunication cable can Fast Installation in a path.Especially, the invention provides a kind ofly has the telecommunication cable of supporting rope and has at least a coaxial cable to be wrapped on the supporting rope, and a kind of like this mode makes coaxial cable to adapt to because thermal expansion and shrink the change in size that causes.More particularly, use coaxial cable length to exceed the particular kind of relationship of supporting rope length, the coaxial cable spirality is wrapped in and is twisted into thigh on supporting rope or the messenger cable or with it.This coaxial cable comprises inner wire, the insulating barrier of parcel inner wire and the outer tubulose metal sheath of wrap insulate layer.Preferably insulating barrier is that the expanded foam insulator is such as the closed-cell polyethylene foam plastics.This coaxial cable can selectively comprise the protective layer of a coated metal crust.
The coaxial cable of aerial installation provided by the present invention links to each other their end by electric power connector with other element in the cable system.Cable can extend hundreds of or thousands of feet between connector.As a result, thermal expansion and shrink and can produce very high tension force at the electric power connector place, so just reduced the cable signal transmission performances or even cause that coaxial cable pulls out from connector, system is disconnected.Yet have been found that, by the coaxial cable helical configuration being wrapped in around the supporting rope and the length ratio of coaxial cable and supporting rope is controlled between the qualification parameter 1.005 and 1.010, cable can effectively bear serious thermal expansion and contraction and not need expansion loop.In a most preferred embodiment, this ratio is between 1.006 and 1.010.The most handy variation lay length of coaxial cable is wrapped in around the supporting rope, can limit introducing or periodic impedance that signal has been transmitted the matching circuit loss (SRL) of negative interaction like this and not match.
Adopt the cable of the thigh shape structure of lead and messenger cable supporting rope to be proposed use in specific purposes.Such as, No. the 2473965th, people's such as Morrison United States Patent (USP) mentions that a strand shape construction of cable is used for electric energy transmitting.Become the small-diameter coaxial cable of thigh also to be used for some special lower bandwidth by production with supporting rope, such as wireless radio transmission.Yet there is not the serious tension force that the large-diameter coaxial cable is run among the present invention in these existing application in the thermal contraction process.In addition, these existing application are never recognized the appropriate control cable length that the present invention is mentioned and the importance of supporting rope length ratio.
Except a kind of above-mentioned telecommunication cable is provided, the present invention also comprises a kind of formation method of telecommunication cable.This method generally includes tension force supporting rope of feeding and at least one coaxial cable of feeding, and coaxial cable is made up of the outer tubular metal sheath of inner wire, wrap insulate layer.The coaxial cable of feeding is spiral to be wrapped in along the supporting rope length direction on the supporting rope of feeding, and the length ratio of coaxial cable and supporting rope is controlled between 1.005 and 1.015.As mentioned above, coaxial cable preferably by different lay length spiralitys be wrapped in around the supporting rope.
Telecommunication cable of the present invention can be installed relatively apace in single channel between the common pole and need not to form expansion loop in coaxial cable.Therefore, this coaxial cable does not occur stress usually and concentrates in expansion loop.In addition and since this coaxial cable spirality ground be wrapped in supporting rope on every side and the length ratio of coaxial cable and supporting rope be controlled between 1.005 and 1.015, this coaxial cable can bear thermal expansion and contraction and can not pull out from connector.And, by changing the lay length that coaxial cable twines supporting rope,, coaxial cable can reduce owing to periodically damaging the adverse effect to transmission RF signal that causes.
With reference to the following detailed description of the embodiment of the invention and accompanying drawing thereof, concerning the professional and technical personnel of this area, these and other characteristic of the present invention will be more clear.
Fig. 1-4 shows by order suspension strut rope, hang coaxial cable, be fixed on coaxial cable on the supporting rope and form the method for prior art of the aerial fixing communication cable of expansion loop in coaxial cable;
Fig. 5 is the perspective view according to the telecommunication cable of aerial installation of the present invention;
Fig. 6 is the cross-sectional view along the telecommunication cable of the Fig. 5 that supporting rope and coaxial cable are shown of the line 6-6 among Fig. 5;
Fig. 7 is the schematic diagram according to the method for formation telecommunication cable of the present invention;
Fig. 8 is along the cross-sectional view of Fig. 7 center line 8-8 and to show coaxial cable be how to be wrapped on the supporting rope;
Fig. 9 is the schematic diagram according to the present invention's aerial fixing communication cable in a single channel.
Referring now to Fig. 5, shown comprises a supporting rope 32 and a coaxial cable 34 according to telecommunication cable 30 of the present invention.Coaxial cable 34 is wrapped on the supporting rope 32 by spirality along the length direction of supporting rope.Although only show a coaxial cable 34 in Fig. 5, one or more and coaxial cable 34 parallel other coaxial cables also can be wrapped on the supporting rope 32 by spirality.In addition, the cable of other type also can be parallel to coaxial cable 34 and is wrapped on the supporting rope 32 by spirality.
Telecommunication cable 30 is aloft installed usually and is suspended between two prepositions, and wherein at least one position is preferably overhead.For example, telecommunication cable 30 can be suspended between a common pole 36 and the second place (being generally second common pole).Usually by the instrument that uses any appropriate such as clamping device 38 supporting rope 32 is fixed on the electric pole so that telecommunication cable 30 is fixed on the common pole 36.Telecommunication cable 30, especially coaxial cable 34 are normally used for transmitting the RF signal such as in the application of broadband communications such as data, sound and video.
Being used in supporting rope 32 in the telecommunication cable 30 of the present invention preferably has enough intensity to be wrapped in cable on the supporting rope to support coaxial cable 34 or spirality.A kind of specially suitable material that is used for supporting rope 32 is a kind of galvanized steel cable.If necessary, supporting rope 32 also can wrap up the layer protective layer (not shown).The suitable material that is used for protective layer comprises the thermoplastic coating material such as polyethylene, polyvinyl chloride, polyurethane and various rubber.
The coaxial cable 34 of Shi Yonging normally is used to transmit the type of RF signal in the present invention, such as the wide-band applications as sound, data and video or the like with the frequency band that reaches about 1GHz.Especially, can use trunk and the branch cable that is generally used in these application.As shown in Figure 6, coaxial cable 34 comprises an inner wire 40, surrounds the insulating barrier 42 of inner wire and the metal sheath 44 as outer conductor of encirclement insulating barrier.Coaxial cable 34 also comprises the protective layer as shown in Figure 5 and Figure 6 46 that surrounds metal sheath.
In coaxial cable 34, inner wire 40 is made by the suitable electric conducting material such as copper or aluminium.Best, inner wire 40 is solid copper wire, copper pipe or Copper Foil aluminium.In the embodiment of explanation, only show a single inner wire, because this is the prevailing structure of coaxial cable that is used to transmit this type of RF signal.
Inner wire 40 is surrounded by the insulating barrier such as air or polymer material 42.Usually, when air was used as insulating material, the polymerization body disc that vertically separates was used as the pad between inner wire 40 and the metal sheath 44.Yet insulating barrier 42 is preferably solid-state continuous polymer material and can uses the binding agent such as ethylene acrylic acid co polymer to be bonded on the inner wire 40.The example that is used for insulating barrier 42 can comprise polyethylene, polypropylene and polystyrene etc.For the density that reduces insulating barrier also reduces dielectric constant thus, insulating barrier is preferably expansion closed-cell foam insulating barrier.Best, fluid insulation is the mixture of highdensity polyethylene or high density and low density polyethylene (LDPE).Usually, fluid insulation has the density less than about 0.28g/cc.
What tightly surround insulating barrier 42 is an outer tubulose metal sheath 44.Best, use binding agent such as ethylene acrylic acid co polymer that crust 44 is bonded on the insulating barrier 42 so that when crooked coaxial cable 34, support crust.Crust 44 preferably also have mechanical aspects and electric aspect continuous feature.This make crust 44 effectively mechanical seal and electric hermetically-sealed cable prevent ectocine, also hermetically-sealed cable prevents the leakage of RF radiation simultaneously.Metal sheath 44 can be made by the various conducting metals such as copper or aluminium.In the application of sound, data and video, the external diameter of metal sheath is usually between 0.5 inch and 1.0 inches.
As mentioned above, the outer surface of metal sheath 44 can be by a protective layer 46 parcels.The suitable material that is used for protective layer 46 comprises the thermoplastic coating material such as polyethylene, polyvinyl chloride, polyurethane and various rubber.Usually, use the suitable binding agent such as ethylene acrylic acid co polymer that protective layer 46 is bonded on the crust 44.
Best, the coaxial cable 34 of Shi Yonging is designed to have good flexible in the present invention, i.e. bending property of Zeng Qianging makes coaxial cable be easy to form around the helical structure of supporting rope 32 and in coaxial cable can not cause curling, crooked or other defective thus.The coaxial cable of Shi Yonging should have the minimum bending radius of the cable size that is not less than 10 times in the present invention.Minimum bending radius depends on the axle that progressively cable is bent to more and more littler even radius.After each bending, check the bending of cable or the sign of gauffer.Least radius axle when the gauffer sign takes place first is defined as minimum bending radius.
In order to make coaxial cable 34 have desired flexible and flexural property, preferably use quite thin metal sheath 44.The best coaxial cable of Shi Yonging has tubular metal crust 44 in the present invention, and its wall thickness can be selected to keep the T/D ratio (ratio of wall thickness and external diameter) less than 2.5%.In addition, crust 44 is bonded to has increased the flexible of coaxial cable 34 on the fluid insulation 42 and prevented to damage coaxial cable by supporting crust 44 when the bending.And the hardness of the core (inner wire 40 and insulating barrier 42) that increases with respect to the hardness of crust 44 helps the flexural property of coaxial cable 34.Especially, in the present invention the ratio of the core hardness of the coaxial cable 34 of Shi Yonging and crust hardness is preferably 5.Use in the present invention to have suitable flexible best cable be the QR cable, can obtain from the CommScope company of North Carolina State Hickory.
The ratio of aforesaid core and crust hardness depends on the compressive hardness of independent estimation core (inner wire 40 and insulating barrier 42) and outer conductor 44, will can be observed from its side.The quantity that the core of one regular length (1 inch) and the sample of outer conductor are placed in the compressive load anchor clamps (universal tester) and deflection one limits.To core and outer conductor, this deflection be restricted to its separately diameter 12%.So the ratio of the load of being write down under the deflection that limits can be represented the ratio of hardness.
The professional and technical personnel of same domain understands easily, the coaxial cable 34 of Shi Yonging in the present invention, specifically, the lead that uses in coaxial cable 34 is owing to the variations in temperature of seasonal and every day is expanded with heat and contract with cold, and this will cause bending in the cable and may damage cable.Advantageously, because coaxial cable 34 is wrapped on the supporting rope 32 by spirality and does not have expansion loop, the thermal expansion of coaxial cable (contraction) can not produced stress and be concentrated in cable by whole cable distribution.And coaxial cable 34 preferably changes lay length L spirality and is wrapped in around the supporting rope 32, can limit introducing or periodic impedance that the RF signal has been transmitted the matching circuit loss (SRL) of negative interaction like this and not match.
In the present invention the coaxial cable 34 of Shi Yonging preferably tightly spirality be wrapped in supporting rope 32 around in case coaxial cable 34 along the most of length contact supporting rope of supporting rope.Thus, coaxial cable 34 is supported on the supporting rope and must or be banded on the supporting rope the coaxial cable lash.The tightness of the coaxial cable 34 around the supporting rope 32 can be described as be in the ratio of length with the length of the supporting rope 32 that uses of the coaxial cable that uses in the telecommunication cable 30 in telecommunication cable.For example, to per 100 feet supporting ropes 32, the length of the coaxial cable 34 that is surpassed is greatly between 6 and 18 inches, usually between 8 and 12 inches.Therefore, the ratio of the length of the length of coaxial cable 34 and supporting rope 32 is greatly between 1.005 and 1.015, usually between 1.006 and 1.010.Easy to understand, the length that has more, promptly above-mentioned ratio also can be depending on the situation of stretching of the coaxial cable 34 that uses in telecommunication cable.
The ratio of length that it is found that the length of the coaxial cable 34 that stretches and supporting rope 32 is for the manufacturing of the rope form telecommunication cable among the present invention and effectively install most important.Specifically, in ratio is lower than 1.005 rope form telecommunication cable,, coaxial cable cause coaxial cable from connector, to be pulled out thereby being subjected to high tension force in periodic thermal contraction process.Equally, if this ratio is higher than 1.015, the manufacturing that coaxial cable is wrapped on the supporting rope pine too and stranded cable is difficult to control.At this moment, during fabrication, coaxial cable can cause damaging coaxial cable with the processing equipment collision.In addition, during fabrication, coaxial cable trends towards forming big circle and make to be difficult to cable is received on the cable hank and is difficult to cable is installed on the common pole.This ratio is to the manufacturing of large-diameter cable (44 the diameter that is the tubular metal crust is greater than 0.5 inch cable) and install very crucial.
Telecommunication cable 30 of the present invention was made before installing.The method that forms telecommunication cable 30 comprises by deploy support line and coaxial cable from cable hank feeding supporting rope 32 and coaxial cable 34 on supply cable dish 50 and 52 respectively.Supporting rope 32 and coaxial cable 34 preferably keep certain pre-tensile force by draw-gear 54 and cable hank 50 and 52.Supporting rope 32 and coaxial cable 34 are imported the strander 56 that supporting rope and coaxial cable are arranged in parallel successively.Then, supporting rope 32 and coaxial cable 34 advance to and include the end effector 58 that is used for coaxial cable tightly is wrapped in helical structure the arrangement for deflecting on the supporting rope.Best, with a series of cylinders 59 coaxial cable 34 deflections and import around the supporting rope 32.As shown in Figure 8, coaxial cable 34 is generally circular around the path P of supporting rope 32, both can also can be counter-clockwise direction for clockwise direction.As mentioned above, the coaxial cable spirality is wrapped in around the supporting rope 32 and can cause coaxial cable to damage but coaxial cable 34 is preferably flexible.In addition, one or more additional cables (as coaxial cable) can be parallel to coaxial cable 34 arrangements and spirality is wrapped on the supporting rope 32.
As mentioned above, coaxial cable of the present invention is manufactured into and makes the ratio of length of the length of the coaxial cable 34 stretch and supporting rope 32 between about 1.005 and 1.015, typically between about 1.006 and 1.010.In addition, the lay length L that use to change is wrapped in coaxial cable 34 around the supporting rope 32.As shown in Figure 5, for this reason, the distance between the point at center 66 of supporting rope 32 is directly crossed at the center 64 that lay length L is defined as coaxial cable 34.Swing for usually using coaxial cable 34, lay length L to be preferably in the preset range between about 24 to 32 inches among the present invention.For example, lay length L can swing between 25 and 27 inches or between 26 and 30 inches.The lay length L that changes can prevent from the periodic structure of coaxial cable 34 is destroyed, and has limited thus the matching circuit loss (SRL) of RF signal generation such as the negatively influencing corresponding to the frequency dissipation signal of particular range or the periodically unmatched formation of impedance.
As shown in Figure 7, coaxial cable 34 withdraws from end effector 58 and spirality and is wrapped in around the supporting rope 32 to form telecommunication cable 30.Telecommunication cable 30 pulls straight and can be collected in the container such as cable hank 60 so that preserve and carrying by the draw-gear 54 that is arranged in the downstream from end effector 58.
Telecommunication cable 30 of the present invention is particularly suitable for aerial installation, and wherein at least one position that is used for fixing telecommunication cable is above the ground level.As shown in Figure 9, by from the suitable containers of cable hank 60 and so on, launching the telecommunication cable 30 that telecommunication cable provides a predetermined length.Telecommunication cable 30 is imported into first air position such as first common pole 62, and by the suitable device such as clamping device 18 (Fig. 1) and so on the primary importance on the supporting rope 32 is fixed on the common pole.From first common pole 62 telecommunication cable 32 is imported second air position such as second common pole 64 and so on then.Can import telecommunication cable by suitable device aloft such as pulley 66.In case telecommunication cable 30 has been imported into second common pole 64, then the second place on the supporting rope 34 is fixed on second common pole 64, supporting rope 34 is tightened up up to exceptionally straight basically.In the same way telecommunication cable 30 is installed in another air position then.
The installation of telecommunication cable 30 is that one tunnel processing does not need to install independently supporting rope 32 and coaxial cable 34.Therefore, installation is quite rapid.In addition, because coaxial cable 34 spiralitys are wrapped on the supporting rope 32, in coaxial cable, do not need expansion loop to prevent the damage of thermal expansion.And telecommunication cable 30 of the present invention can not produce thermal expansion stress along the distribution of coaxial cable 34 because of expanding and concentrate.As mentioned above, the lay length L around the coaxial cable 34 of supporting rope 32 changes.As a result, if take place the periodicity of coaxial cable 34 is destroyed, the degree that the RF quality of signals of transmitting by coaxial cable reduces will be reduced.
Be appreciated that read foregoing description of the present invention after, those skilled in the art can be made some variations and modification, these variations and modification are included within the aim and scope of the claims of enclosing.
Claims (9)
1, a kind of telecommunication cable that is used for aerial installation, it is characterized in that, it comprises that a supporting rope and at least one spirality are wrapped in the coaxial cable on the described supporting rope and make the ratio of length of the length of coaxial cable and supporting rope between about 1.005 and 1.015, and described coaxial cable comprises that an inner wire, surrounds the insulating barrier of inner wire and surrounds the outer tubulose metal sheath of insulating barrier.
According to the described telecommunication cable of claim 1, it is characterized in that 2, the ratio of the length of coaxial cable and the length of supporting rope is between about 1.006 and 1.010.
According to the described telecommunication cable of aforementioned arbitrary claim, it is characterized in that 3, described tubulose crust has the diameter between about 0.5 and 1.0 inch.
According to the described telecommunication cable of aforementioned arbitrary claim, it is characterized in that 4, described tubulose crust has the diameter greater than 0.5 inch.
According to the described telecommunication cable of aforementioned arbitrary claim, it is characterized in that 5, described coaxial cable adopts the lay length spirality that changes to be wrapped on the described supporting rope.
According to the described telecommunication cable of aforementioned arbitrary claim, it is characterized in that 6, described coaxial cable is used the lay length spirality of swinging in the preset range between about 24 inches and 32 inches and is wrapped on the described supporting rope.
According to the described telecommunication cable of aforementioned arbitrary claim, it is characterized in that 7, described at least one coaxial cable comprises two or more coaxial cables that are arranged parallel to each other.
According to the described telecommunication cable of aforementioned arbitrary claim, it is characterized in that 8, described coaxial cable comprises that also one surrounds the protective layer of metal sheath.
9, a kind of method that is used to form the described telecommunication cable of aforementioned arbitrary claim is characterized in that this method comprises the steps:
Feeding tension force supporting rope;
At least one comprises the coaxial cable that an inner wire, surrounds the insulating barrier of inner wire and surrounds the outer tubulose metal sheath of insulating barrier feeding; And
Simultaneously the spirality that imports feeding along the length direction of supporting rope be wrapped in the coaxial cable around the supporting rope and control the length of coaxial cable and the ratio of the length of supporting rope between 1.005 and 1.015.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79755597A | 1997-02-06 | 1997-02-06 | |
| US08/797,555 | 1997-02-06 | ||
| US84851297A | 1997-04-28 | 1997-04-28 | |
| US08/848,512 | 1997-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1237282A true CN1237282A (en) | 1999-12-01 |
Family
ID=27121892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98801192A Pending CN1237282A (en) | 1997-02-06 | 1998-02-05 | Aerially installed communications cable |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1021857A1 (en) |
| JP (1) | JP3308547B2 (en) |
| KR (1) | KR100355443B1 (en) |
| CN (1) | CN1237282A (en) |
| AU (1) | AU729827B2 (en) |
| BR (1) | BR9807820A (en) |
| TW (1) | TW375742B (en) |
| WO (1) | WO1998035416A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101536118B (en) * | 2006-11-03 | 2011-08-24 | Abb研究有限公司 | High voltage cable |
| CN104944217A (en) * | 2015-06-26 | 2015-09-30 | 浙江特拉建材有限公司 | Wire breakage preventing device |
| CN107104394A (en) * | 2017-04-30 | 2017-08-29 | 陶霞霞 | A kind of method that blow-off line is crossed in extra-high-tension cable process of deployment |
| CN107154600A (en) * | 2017-04-30 | 2017-09-12 | 陶霞霞 | The method whether cable stretches is judged in a kind of extra-high-tension cable process of deployment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3791891B2 (en) * | 2000-03-13 | 2006-06-28 | 大明株式会社 | Cable erection method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2473965A (en) * | 1947-01-08 | 1949-06-21 | American Steel & Wire Co | Self-supporting aerial electric conducting cable |
| US2870327A (en) * | 1953-03-03 | 1959-01-20 | Bell Telephone Labor Inc | Electronic probability circuit |
| US2870237A (en) * | 1958-04-08 | 1959-01-20 | Charles L Wilkins | Multiple conductor service cable insulator |
| US4832442A (en) * | 1987-07-17 | 1989-05-23 | United Ropeworks (U.S.A.) Inc. | Method and apparatus for aerial installation of fiber optic cables |
-
1998
- 1998-02-05 AU AU62743/98A patent/AU729827B2/en not_active Ceased
- 1998-02-05 BR BR9807820-8A patent/BR9807820A/en not_active IP Right Cessation
- 1998-02-05 TW TW087101534A patent/TW375742B/en active
- 1998-02-05 KR KR1019997007001A patent/KR100355443B1/en not_active IP Right Cessation
- 1998-02-05 EP EP98905019A patent/EP1021857A1/en not_active Withdrawn
- 1998-02-05 WO PCT/US1998/002481 patent/WO1998035416A1/en active IP Right Grant
- 1998-02-05 JP JP53498098A patent/JP3308547B2/en not_active Expired - Fee Related
- 1998-02-05 CN CN98801192A patent/CN1237282A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101536118B (en) * | 2006-11-03 | 2011-08-24 | Abb研究有限公司 | High voltage cable |
| CN104944217A (en) * | 2015-06-26 | 2015-09-30 | 浙江特拉建材有限公司 | Wire breakage preventing device |
| CN107104394A (en) * | 2017-04-30 | 2017-08-29 | 陶霞霞 | A kind of method that blow-off line is crossed in extra-high-tension cable process of deployment |
| CN107154600A (en) * | 2017-04-30 | 2017-09-12 | 陶霞霞 | The method whether cable stretches is judged in a kind of extra-high-tension cable process of deployment |
| CN107104394B (en) * | 2017-04-30 | 2019-01-04 | 芜湖泰庆电子科技有限公司 | The method of blow-off line is crossed in a kind of extra-high-tension cable process of deployment |
Also Published As
| Publication number | Publication date |
|---|---|
| AU729827B2 (en) | 2001-02-08 |
| BR9807820A (en) | 2000-03-08 |
| EP1021857A1 (en) | 2000-07-26 |
| JP3308547B2 (en) | 2002-07-29 |
| AU6274398A (en) | 1998-08-26 |
| KR20000070745A (en) | 2000-11-25 |
| TW375742B (en) | 1999-12-01 |
| JP2000513199A (en) | 2000-10-03 |
| WO1998035416A1 (en) | 1998-08-13 |
| KR100355443B1 (en) | 2002-10-11 |
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