Patent US4337994A successfully refreshed from Google Patents.
Patent US4359598A successfully refreshed from Google Patents.
US4359598A
Expired / Lapsed
US
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Overhead electric transmission systems
Assignee: Balfour Beatty PLC
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Filing: 1980-12-29
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Granted: 1982-11-16
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Expires: 2000-12-29
Abstract
Abstract A flexible stranded body, such as an electric conductor of an overhead electric transmission or distribution system, comprises at least one stranded layer of elongate elements of metal or metal alloy, at least one elongate compartment within and extending throughout the length of the stranded body and, loosely housed in the elongate compartment, at least one separate optical fibre and/or at least one optical bundle. Preferably, the elongate compartment extends within a circumferentially rigid central core which is surrounded by the stranded layer or layers but it may be a bore in an elongate element of a stranded layer or an elongate space bounded by two adjacent elongate elements.
Inventors
- 👤 Phillip Dey
- 👤 Peter Fearns
- 👤 Karl W. Plessner
- 👤 Kenneth H. Pickup
- 👤 Bernard Gaylard
- 👤 Arthur B. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:30
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4422; G02B6/4403; H; H01; H01B; H01B5/00; H01B5/08; H01B5/10; H01B5/108
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
An overhead flexible electric transmission conductor (as claimed in claim 3, wherein) adapted to be freely supported from spaced supports in long lengths, comprising a substantially circumferentially rigid central core comprising at least two bare elongate members of metal or metal alloy assembled together to form an elongate body having a central bore extending throughout the length of the core and constituting an elongate compartment, each bare elongate member of the central core (is) being of such a transverse cross-sectional shape that they inter-engage at least to limit the extent of lateral movement between the elongate members; at least one separate flexible optical guide loosely housed in the elongate compartment; and, surrounding the central core, at least one stranded layer of helically wound bare elongate elements of metal or metal alloy.
Claim 2
Dependent Claim
32 words
An overhead flexible electric transmission conductor as claimed in claim 1, wherein the central core comprises two inter-engaging bare elongate members, each having a transverse cross sectional shape approximating to a semi-annulus.
Claim 3
Dependent Claim
28 words
An overhead flexible electric transmission conductor as claimed in claim 2, wherein the two bare elongate members of the central core are of identical transverse cross sectional shape.
Claim 4
Dependent Claim
103 words
An overhead flexible electric transmission conductor (as claimed in claim 2, wherein the central core is) adapted to be freely supported from spaced supports in long lengths, comprising a substantially circumferentially rigid central core consisting of a single bare elongate member of substantially U-shaped transverse cross-section, the space between the limbs and base of the U-shape extending throughout the length of the core and constituting (the) an elongate compartment; at least one separate flexible optical guide loosely housed in the elongate compartment; and, surrounding the central core, at least one stranded layer of helically wound bare elongate elements of metal or metal alloy.
Claim 5
Dependent Claim
40 words
An overhead flexible electric transmission conductor as claimed in claim 4, wherein at least one of the limbs of the U is folded inwardly so that the gap between the free ends of the limbs is at least partially closed.
Claim 6
Dependent Claim
44 words
An overhead flexible electric transmission conductor as claimed in claim 4 wherein the gap between the free ends of the limbs of the U is closed by at least one tape of metal or metal alloy which is applied around the U-shaped elongate member.
Claim 7
Dependent Claim
127 words
An overhead flexible electric transmission conductor (as claimed in claim 15, wherein) adapted to be freely supported from spaced supports in long lengths comprising at least one stranded layer of helically wound bare elongate elements of metal or metal alloy, said bare elongate elements (have) having a transverse cross-sectional shape approximating to a sector of an annulus and at least one of the abutting faces of (said) adjacent elongate elements having an elongate recess which is closed by the flat surface of the other of the abutting faces to form an elongate space which constitutes an elongate compartment extending throughout the length of the layer and, loosely housed in the elongate compartment or at least one of the elongate compartments, at least one separate flexible optical guide.
Claim 8
Dependent Claim
48 words
An overhead flexible electric transmission conductor as claimed in claim 4, wherein the or each separate flexible optical guide in the elongate compartment or in at least one of the elongate compartments is supported by a flexible elongate carrier member which is loosely housed in the elongate compartment.
Claim 9
Dependent Claim
32 words
An overhead flexible electric transmission conductor as claimed in claim 1 or 4, wherein the flexible optical guide or at least one of the flexible optical guides is a separate optical fiber.
Claim 10
Dependent Claim
31 words
An overhead flexible electric transmission conductor as claimed in claim 1 or 4, wherein the flexible optical guide or at least one of the flexible optical guides is an optical bundle.
Claim 11
Dependent Claim
36 words
An overhead flexible electric transmission conductor as claimed in claim 1 or 4, wherein the or each separate flexible optical guide and the elongate compartment in which it is loosely housed are of approximately equal lengths.
Claim 12
Dependent Claim
33 words
An overhead flexible electric transmission conductor as claimed in claim 4, wherein the limbs of the U are folded together so that the gap between the free ends of the limbs is closed.
Claim 13
Dependent Claim
26 words
An overhead flexible electrical transmission conductor as claimed in claim 4 wherein the limbs of the U-shaped elongate member are closed to form a circular section.
References Cited (Backward Citations)
GB614862A
Cited
US3434775A
Cited
US3391244A
Cited
US3586751A
Cited
DE2143134A1
Cited
US3883218A
Cited
FR2239742A1
Cited
US4038489A
Cited
US3930113A
Cited
US4089585A
Cited
US4230395A
Cited
DE2511019A1
Cited
DE2604766A1
Cited
US4078853A
Cited
DE2635979A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |