US4112357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting current detector
Assignee: National Aeronautics and Space Administration
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Filing: 1977-09-22
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Granted: 1978-09-05
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Expires: 1997-09-22
Abstract
Abstract An apparatus for measuring the intensity of current produced in an elongated electrical conductive member by a lightning strike for determining the intensity of the lightning strike. The apparatus includes an elongated strip of magnetic material that is carried within an elongated tubular housing. A predetermined electrical signal is recorded along the length of said elongated strip of magnetic material. One end of the magnetic material is positioned closely adjacent the electrically conductive member so that the magnetic field produced by current flowing through said electrically conductive member disturbs a portion of the recorded electrical signal directly proportional to the intensity of the lightning strike.
Inventors
- 👤 Stephen F. Livermore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:59
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/04; G01R15/00; G01R15/14; G01R15/146; G01R15/148; G01W; G01W1/00; G01W1/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
An apparatus for measuring the intensity of a current produced in an elongated electrical conductive member by a lightning strike for determining the intensity of said lightning strike, said apparatus comprising: (a) an elongated strip of magnetic material, (b) means for holding said elongated strip of magnetic material perpendicular to said elongated electrical conductive member, (c) a predetermined electrical signal recorded along the length of said elongated strip of magnetic material, (d) one end of said magnetic material being positioned closely adjacent said electrical conductive member with the magnetic material extending perpendicularly outward from said electrically conductive member a greater distance than the distance of a magnetic field that is produced by current induced in said conductive member caused by an anticipated lightning strike, whereby by analyzing the distance that said recorded signal is disturbed from said one end of said magnetic material by the magnetic field, the intensity of said lightning strike can be determined.
Claim 2
Independent Claim
156 words
An apparatus for measuring the intensity of a current produced in an elongated electrical conductive member by a lightning strike for determining the intensity of said lightning strike, said apparatus comprising: (a) an elongated strip of magnetic material, (b) means for holding said elongated strip of magnetic material perpendicular to said elongated electrical conductive member, (c) a predetermined electrical signal recorded along the length of said elongated strip of magnetic material, (d) one end of said magnetic material being positioned closely adjacent said electrical conductive member with the magnetic material extending perpendicularly outward from said electrically conductive member a greater distance than the distance of a magnetic field that is produced by current induced in said conductive member caused by an anticipated lightning strike, whereby by analyzing the distance that said recorded signal is disturbed from said one end of said magnetic material by the magnetic field, the intensity of said lightning strike can be determined.
Claim 3
Dependent Claim
35 words
The apparatus as set forth in claim 1 further comprising: (a) an elongated tubular housing, carried perpendicular to said electrical conductive member, (b) said elongated strip of magnetic material being carried in said tubular housing.
Claim 4
Dependent Claim
31 words
The apparatus as set forth in claim 2 further comprising: (a) a non-conductive elongated member carried in said housing, (b) said magnetic material extending along the length of said non-conductive member.
Claim 5
Dependent Claim
38 words
The apparatus as set forth in claim 4 wherein: (a) said magnetic material is in the form of an elongated endless loop, (b) said loop of magnetic material extending around said non-conductive elongated member along a longitudinal axis.
Claim 6
Dependent Claim
44 words
The apparatus as set forth in claim 2 further comprising: (a) a non-conductive brace, (b) means for attaching said non-conductive brace to said electrical conductive member, and (c) means for attaching said tubular housing to said non-conductive brace perpendicular to said electrically conductive member.
Claim 7
Dependent Claim
35 words
The apparatus as set forth in claim 2 further comprising: (a) removable caps carried on the ends of said tubular housing for sealing said housing and providing access to said elongated strip of magnetic material.
Claim 8
Independent Claim
164 words
An apparatus for measuring the intensity of a current produced in an elongated electrically conductive member by a lightning strike, comprising: (a) an elongated, non-conductive member, (b) an elongated, magnetic strip extending on opposite sides of said elongated, non-conductive member, (c) an elongated tubular housing enclosing said non-conductive member with said elongated strip of magnetic material positioned thereon, (d) means for mounting said tubular housing perpendicular to said electrically conductive member, (e) a predetermined electrical signal recorded along the length of said elongated strip of magnetic material, (f) said elongated strip of magnetic material extending outwardly from adjacent said electrical conductive member a distance greater than the distance of a magnetic field that is produced by current induced in said conductive member caused by an anticipated lightning strike, whereby by analyzing the distance that said recorded signal is disturbed from said end of said magnetic strip adjacent said electrically conductive member by the magnetic field, the intensity of said lightning strike can be determined.
Claim 9
Independent Claim
164 words
An apparatus for measuring the intensity of a current produced in an elongated electrically conductive member by a lightning strike, comprising: (a) an elongated, non-conductive member, (b) an elongated, magnetic strip extending on opposite sides of said elongated, non-conductive member, (c) an elongated tubular housing enclosing said non-conductive member with said elongated strip of magnetic material positioned thereon, (d) means for mounting said tubular housing perpendicular to said electrically conductive member, (e) a predetermined electrical signal recorded along the length of said elongated strip of magnetic material, (f) said elongated strip of magnetic material extending outwardly from adjacent said electrical conductive member a distance greater than the distance of a magnetic field that is produced by current induced in said conductive member caused by an anticipated lightning strike, whereby by analyzing the distance that said recorded signal is disturbed from said end of said magnetic strip adjacent said electrically conductive member by the magnetic field, the intensity of said lightning strike can be determined.
References Cited (Backward Citations)
US2870407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |