Patent US5856776A successfully refreshed from Google Patents.
US5856776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for signal coupling at medium voltage in a power line carrier communications system
Assignee: Remote Metering Systems Ltd
•
Filing: 1994-11-24
•
Granted: 1999-01-05
•
Expires: 2014-11-24
Abstract
Abstract An electricity supply network has plural switching and transformer stations connected together by cables. Each cable has an inner conductor and an outer sheath connected to housings of the stations. A communication system has plural transducers coupled to the cables at the stations. Each of the transducers is located on a side of its respective cable remote from a sheath connection of the respective cable to its station housing. Each transducer is coupled to both the sheath and the conductor of its respective cable.
Inventors
- 👤 Donald Stuart Armstrong
- 👤 Nigal John Halse
- 👤 Paul Martin Moore
- 👤 Joseph Anthony Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:58
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/54; H04B3/56; H04B2203/00; H04B2203/54; H04B2203/5429; H04B2203/5433; H04B2203/5462; H04B2203/5466; H04B2203/5483; H04B2203/5495
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
101 words
An electricity supply network comprising a plurality of switching and transformer stations connected together by cables, each cable comprising at least one inner conductor and an outer sheath, which is connected to housings of the stations, and a communication system comprising a plurality of transducers, each transducer is coupled to its respective cable at each station, each of the transducers being located on a side of its respective cable remote from a sheath connection of the respective cable to its station housing, whereby each transducer is coupled to both the sheath and the at least one conductor of its respective cable.
Claim 2
Dependent Claim
101 words
An electricity supply network comprising a plurality of switching and transformer stations connected together by cables, each cable comprising at least one inner conductor and an outer sheath, which is connected to housings of the stations, and a communication system comprising a plurality of transducers, each transducer is coupled to its respective cable at each station, each of the transducers being located on a side of its respective cable remote from a sheath connection of the respective cable to its station housing, whereby each transducer is coupled to both the sheath and the at least one conductor of its respective cable.
Claim 3
Dependent Claim
24 words
A network according to claim 1, wherein at least one cable termination includes a gland connecting each cable sheath to its respective station housing.
Claim 4
Dependent Claim
51 words
A network according to claim 1, wherein at least one cable termination includes an accessible length of at least one inner conductor and an earth strap connecting a respective sheath to a respective station housing, each transducer being located around its respective cable at a point where its sheath is present.
Claim 5
Dependent Claim
58 words
A network according to claim 1 wherein at least one cable termination includes an accessible length of at least one inner conductor and an earth strap connecting a respective sheath to a respective station housing, each transducer being located around the accessible length of at least one inner conductor and the earth strap passing through the respective transducer.
Claim 6
Dependent Claim
15 words
A network according to claim 1 wherein each transducer comprises two separable magnetic core sections.
Claim 7
Dependent Claim
15 words
A network according to claim 5 wherein the two magnetic core sections have mating faces.
Claim 8
Dependent Claim
19 words
The network of claim 6 wherein the mating faces are constructed and arranged to mate with a keying action.
Claim 9
Dependent Claim
19 words
The network of claim 6 wherein the mating faces slope and are constructed to mate with a sliding action.
Claim 10
Dependent Claim
17 words
A network according to claim 5, wherein each of the transducers has separate drive and sense windings.
Claim 11
Dependent Claim
29 words
A network according to claim 5, wherein the transducer includes drive and sense windings, at least one of the drive and sense windings forming part of a tuned circuit.
Claim 12
Dependent Claim
12 words
A network according to claim 10, wherein the tuned circuit is adjustable.
Claim 13
Dependent Claim
23 words
A network according to claim 5, wherein each of the transducers has a monitor winding separate from all other windings of the transducer.
References Cited (Backward Citations)
US3223889A
Cited
US3911415A
Cited
US4321581A
Cited
US4475209A
Cited
US4686382A
Cited
US4745391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-01-04 | 2002-07-06 | 2003-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-04 | 2006-07-06 | 2007-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-04 | 2010-07-06 | 2011-01-05 | $7700.00 | Window Closed / Lapsed |