US4373174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for protective magnetization of vessels
Assignee: Individual
•
Filing: 1979-03-28
•
Granted: 1983-02-08
•
Expires: 1999-03-28
Abstract
Abstract A method for the protective magnetization of vessels by using magnetic loops (11). The field strength of the magnetic field surrounding the vessel is detected by means of a Hall generator (12) and the current through the magnetic loop (11) is controlled in dependence on the field strength thus detected.
Inventors
- 👤 Nils B. Akesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:29
CPC Classifications
B; B63; B63G; B63G9/00; B63G9/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
A method for the protective magnetization of a vessel having a magnetic loop comprising: detecting the actual field strength of the magnetic field surrounding the vessel, as a function of the heading and longitudinal and transverse inclinations of the vessel, with a Hall generator, and controlling the current through said magnetic loop so that the absolute value of the magnitude of the current increases faster than does the output of the Hall generator, to a maximum value.
Claim 2
Independent Claim
77 words
A method for the protective magnetization of a vessel having a magnetic loop comprising: detecting the actual field strength of the magnetic field surrounding the vessel, as a function of the heading and longitudinal and transverse inclinations of the vessel, with a Hall generator, and controlling the current through said magnetic loop so that the absolute value of the magnitude of the current increases faster than does the output of the Hall generator, to a maximum value.
Claim 3
Dependent Claim
20 words
A method according to claim 1, characterized in that the field strength is detected near the bottom of the vessel.
Claim 4
Dependent Claim
60 words
A method according to claim 1, characterized in that a direct current is supplied to the Hall generator (12) and that the output signal (V) thereof depending on the magnetic field at right angles to the plane of the generator plate, after amplification, is used to control a power unit (17) to feed the magnetic loop (11) with direct current.
Claim 5
Independent Claim
42 words
A method according to any one of claims 1, 2 or 3, characterized in that the field strength of the magnetic field is detected in the athwartships direction of the vessel and is supplied to one or more magnetic loops disposed athwartships.
Claim 6
Independent Claim
42 words
A method according to any one of claims 1, 2 or 3, characterized in that the field strength of the magnetic field is detected in the fore-and-aft direction of the vessel and is supplied to one or more magnetic loops disposed fore-and-aft.
Claim 7
Dependent Claim
44 words
A method according to claim 1, characterized in that the detection of the field strength of the magnetic field is effected at one or more positions and that each signal is supplied to a separate protective magnetization system with one or more magnetic loops.
References Cited (Backward Citations)
US2267838A
Cited
US2715198A
Cited
US2421583A
Cited
US2519395A
Cited
US2793602A
Cited
US2832041A
Cited
DE1038432B
Cited
DE1101207B
Cited
DE977881C
Cited
US3110282A
Cited
US3215904A
Cited
DE1516964C3
Cited
US3482163A
Cited
US3801877A
Cited
DE2659552A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |