US3868569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for distinguishing between energized and induced voltages on high voltage power lines
Assignee: Individual
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Filing: 1973-05-08
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Granted: 1975-02-25
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Expires: 1993-05-08
Abstract
Abstract Apparatus for detecting whether a conductor at high voltage is energized or is carrying induced voltage only, comprising an elongated tube having an electrical contact on a first end for contacting the conductor, a string of high voltage capacitors connected in series running substantially the length of such tube, means for making a connection to ground, and a milliammeter positioned at the other end of the tube and connected between ground and the string of capacitors. The device is characterized by an expulsion cap which is easily expelled from said tube upon gas build up within the tube due to capacitor burn out. Relatively high current readings are obtained when the tested line is directly energized, the lines carrying induced voltage only producing relatively low current indications.
Inventors
- 👤 Carl H Faust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:58
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/155; G01R15/00; G01R15/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
Apparatus for distinguishing between energized and induced high voltage lines, comprising: a. capacitance means for providing a net effective capacitance, said capacitance means comprising a plurality of capacitors in series, each such capacitor having a resistor connected in parallel therewith; b. current reading means, in series combination with said capacitor means, for indicating current flow through said capacitance means; c. first electrical connecting means, for connecting a first terminal of said series combination to a high voltage line; d. second electrical connecting means, for connecting a second terminal of said series combination to a system ground reference; e. said current reading means having a range adapted such that when said apparatus is connected between a high voltage line and system ground, there is provided a reliable indication whether or not said line is energized, said current reading means being a direct reading meter; and f. a housing for containing said apparatus, said housing having a cap at the end thereof adjacent to said first connecting means, said cap being adapted to be easily expelled from said housing upon generation of pressure within said housing.
Claim 2
Dependent Claim
184 words
Apparatus for distinguishing between energized and induced high voltage lines, comprising: a. capacitance means for providing a net effective capacitance, said capacitance means comprising a plurality of capacitors in series, each such capacitor having a resistor connected in parallel therewith; b. current reading means, in series combination with said capacitor means, for indicating current flow through said capacitance means; c. first electrical connecting means, for connecting a first terminal of said series combination to a high voltage line; d. second electrical connecting means, for connecting a second terminal of said series combination to a system ground reference; e. said current reading means having a range adapted such that when said apparatus is connected between a high voltage line and system ground, there is provided a reliable indication whether or not said line is energized, said current reading means being a direct reading meter; and f. a housing for containing said apparatus, said housing having a cap at the end thereof adjacent to said first connecting means, said cap being adapted to be easily expelled from said housing upon generation of pressure within said housing.
References Cited (Backward Citations)
US1868962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |