US4384289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transponder unit for measuring temperature and current on live transmission lines
Assignee: Niagara Mohawk Power Corp
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Filing: 1981-01-23
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Granted: 1983-05-17
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Expires: 2001-01-23
Abstract
Abstract A toroidal shaped transponder unit is connected to a live power transmission line by means of a tripping mechanism and a hinge assembly. The unit includes means for sensing the temperature and current of the power transmission line and for transmitting the information to a local receiver. The toroid housing includes an open frame mounting hub and spoke assembly for mounting the sensors without interfering with the thermodynamics of the transmission line. The unit further includes a power coil and core assembly for receiving magnetic emanations from the transmission line and generating power to operate the electronic components within the unit.
Inventors
- 👤 Howard R. Stillwell
- 👤 Roosevelt A. Fernandes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:52
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/024; G01K1/14; G01K1/143; G01R; G01R1/00; G01R1/20; G01R1/22; G01R15/00; G01R15/14; G01R15/142; G01R15/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A method for monitoring the operating temperature of a power transmission line comprising the steps of: separating the two halves of a circular housing containing a temperature sensor and a spring loaded trip mechanism; at least partially encompassing a power transmission line with said two housing halves; contacting said trip mechanism with said transmission line causing said spring to force the two halves into contact and to cause said temperature sensor to come in thermal contact with said power transmission line.
Claim 2
Independent Claim
81 words
A method for monitoring the operating temperature of a power transmission line comprising the steps of: separating the two halves of a circular housing containing a temperature sensor and a spring loaded trip mechanism; at least partially encompassing a power transmission line with said two housing halves; contacting said trip mechanism with said transmission line causing said spring to force the two halves into contact and to cause said temperature sensor to come in thermal contact with said power transmission line.
Claim 3
Dependent Claim
22 words
The method of claim 1 including the step of securing said two housing halves to each other and to said transmission line.
Claim 4
Dependent Claim
152 words
A transponder unit for monitoring the conductor temperature of a power transmission line, said transponder unit comprising, in combination: A. a toroidal-shaped, conductive housing consisting of two semi-annular housing sections; B. a cylindrical hub consisting of two semi-annular hub sections; C. angularly spaced spokes separately interconnecting said hub sections to said housing sections; D. a hinge mechanism interconnecting said housing sections for swinging movement between a relatively open position to admit a transmission line to the open interior of said hub and a relatively closed position with said hub embracing the transmission line to mount said transponder unit thereon; E. at least one temperature sensing probe carried by said housing and extending radially through an opening in said hub into thermally coupled relation with the transmission line; and F. electronic signal transmission means accommodated in said housing for wireless communication to a remote location of conductor temperature data obtained by said probe.
Claim 5
Dependent Claim
152 words
A transponder unit for monitoring the conductor temperature of a power transmission line, said transponder unit comprising, in combination: A. a toroidal-shaped, conductive housing consisting of two semi-annular housing sections; B. a cylindrical hub consisting of two semi-annular hub sections; C. angularly spaced spokes separately interconnecting said hub sections to said housing sections; D. a hinge mechanism interconnecting said housing sections for swinging movement between a relatively open position to admit a transmission line to the open interior of said hub and a relatively closed position with said hub embracing the transmission line to mount said transponder unit thereon; E. at least one temperature sensing probe carried by said housing and extending radially through an opening in said hub into thermally coupled relation with the transmission line; and F. electronic signal transmission means accommodated in said housing for wireless communication to a remote location of conductor temperature data obtained by said probe.
Claim 6
Dependent Claim
20 words
The transponder unit defined in claim 3, wherein said hub sections are apertured to ventilate the interior of said hub.
Claim 7
Dependent Claim
31 words
The transponder unit defined in claim 3, which further includes an annular magnetic sensing coil mounted within said housing for providing an indication of the current flowing in the transmission line.
Claim 8
Dependent Claim
53 words
The transponder unit defined in claim 3, which further includes an iron core split loop mounted within said housing and linked with the electromagnetic field associated with the flow of current in the transmission line, and a secondary winding on said core in which is induced operating voltage for said signal transmission means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |