US3581202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for the electro-optical measurement of an electrical quantity
Assignee: Merlin Gerin SA
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Filing: 1968-08-15
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Granted: 1971-05-25
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Expires: 1988-08-15
Abstract
Abstract Electro-optical measuring device for high-voltage overhead lines wherein a light beam is directed to the line and reflected to the earth surface and whereby both the upwardly directed light beam and the reflected light beam follow the same path and traverse the same measuring devices.
Inventors
- 👤 Yves J Pelenc
- 👤 Georges M Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/14; G01R15/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
An electro-optical device for measuring an electrical quantity characteristic of an overhead high-voltage line, comprising: a light source disposed adjacent the earth surface, a light beam emitted by said source, optical means to direct said light beam towards said overhead line along a predetermined path, reflecting means disposed in the path of said light beam adjacent said overhead line to reflect said light beam substantially along said predetermined path towards said earth surface, polarizing means disposed in said predetermined path to be traversed by said transmitted and reflected light beams, modulating means disposed in the path of said light beam adjacent said overhead line between said polarizing means and said reflecting means to modulate said light beam as a function of said electric quantity, and modulation detecting means elaborating said reflected light beam adjacent said earth surface to detect the degree of modulation of said modulated light beam.
Claim 2
Dependent Claim
148 words
An electro-optical device for measuring an electrical quantity characteristic of an overhead high-voltage line, comprising: a light source disposed adjacent the earth surface, a light beam emitted by said source, optical means to direct said light beam towards said overhead line along a predetermined path, reflecting means disposed in the path of said light beam adjacent said overhead line to reflect said light beam substantially along said predetermined path towards said earth surface, polarizing means disposed in said predetermined path to be traversed by said transmitted and reflected light beams, modulating means disposed in the path of said light beam adjacent said overhead line between said polarizing means and said reflecting means to modulate said light beam as a function of said electric quantity, and modulation detecting means elaborating said reflected light beam adjacent said earth surface to detect the degree of modulation of said modulated light beam.
Claim 3
Dependent Claim
101 words
A device according to claim 1, wherein said modulating means comprises first electro-optical transducer means producing a rotation of the polarization plane of said transmitted light beam of an angular amount substantially proportional to the value of said electrical quantity, said modulation detecting means comprising second electro-optical transducer means disposed in said path adjacent said earth surface and traversed by said transmitted and reflected light beams to produce a compensating rotation of the polarization plane of said light beams of an angular amount substantially equal but opposed to the angular rotation of the polarization plane produced by said first transducer means.
Claim 4
Dependent Claim
45 words
A device according to claim 2, further comprising additional means disposed in said path between said polarizing means and said second transducer means to produce a rotation of the polarization plane of a predetermined angular amount of the transmitted and reflected light beams passing therethrough.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |