GB627103A - Improvements in and relating to electric communication cables - Google Patents
Improvements in and relating to electric communication cablesInfo
- Publication number
- GB627103A GB627103A GB774447A GB774447A GB627103A GB 627103 A GB627103 A GB 627103A GB 774447 A GB774447 A GB 774447A GB 774447 A GB774447 A GB 774447A GB 627103 A GB627103 A GB 627103A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cable
- air space
- inner conductor
- outer sheath
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
Landscapes
- Insulated Conductors (AREA)
Abstract
627,103. Air-space cables. TELEGRAPH CONSTRUCTION & MAINTENANCE CO., Ltd., DEAN, J. N., and SMITH, E. W. March 20, 1947, No. 7744. [Class 36] An air space coaxial cable, in which the air space is surrounded by a sheath of dielectric material, has positioned within the inner conductor a material having moisture-absorbing properties superior to those of the dielectric material, so as to delay any increase of humidity within the air space and consequent deterioration, of the electrical characteristics. In the case of a cable having a central conductor, as described in Specification 623,748, the absorbent material may form the central core, may be wrapped around the central core, or may be applied as a backing to the metallic tapes forming the inner conductor. Paper is a suitable material to use for the purpose. Additional protection may be given by providing the cable with a water excluding layer, such as metallic tapes applied helically over the outer sheath of the cable, and secured with an adhesive such as bitumen. An additional absorbent layer may be applied between different layers of the outer sheath of the cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB774447A GB627103A (en) | 1947-03-20 | 1947-03-20 | Improvements in and relating to electric communication cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB774447A GB627103A (en) | 1947-03-20 | 1947-03-20 | Improvements in and relating to electric communication cables |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB627103A true GB627103A (en) | 1949-07-28 |
Family
ID=9838887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB774447A Expired GB627103A (en) | 1947-03-20 | 1947-03-20 | Improvements in and relating to electric communication cables |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB627103A (en) |
-
1947
- 1947-03-20 GB GB774447A patent/GB627103A/en not_active Expired
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