Patent US3932872A successfully refreshed from Google Patents.
US3932872A
Expired / Lapsed
US
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Core design for flexible H-sensor for ELF
Assignee: United States Department of the Navy
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Filing: 1974-12-23
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Granted: 1976-01-13
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Expires: 1994-12-23
Abstract
Abstract A counterwound, magnetic core for a towed-cable, helically wound, ELF anta comprising a cylindrical, plastic, center insert, with or without a center conductor, with two strips or sets of strips of magnetic material counterwound about it so that a plurality of good-mechanical-contact, strip, crossover points are formed distributed around the circumference of the insert and down its length. An insulating material is then wrapped around these counterwound strips and a conductor helically wound around that. This design, by providing alternate flux paths down the core via the crossover points provides a lower, core reluctance and, when the core is under stress, provides a flux path that avoids the high-stress regions of the core thus reducing the amount of flux that is stress-modulated. Thus a substantial magnetostrictive noise reduction is obtained.
Inventors
- 👤 Joseph A. Zenel
- 👤 William G. McGuffin
- 👤 William E. Barnette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:39
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q7/06; H01Q7/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
A magnetic-core, flexible, H-plane sensor for ELF communications comprising: small-circumference, longitudinal insert means; first ribbon means of magnetic material wound in a clockwise fashion down the length of said insert means; second ribbon means of magnetic material wound in a counterclockwise fashion down the length of said insert means so that said first and second ribbon means cross each other at a plurality of good-mechanical-contact points down the length of said insert means; insulation means wrapped around said first and second ribbon means down the length of said insert means so that said ribbon means are insulated from the outer environment; and conductor means wrapped around said insulator means down its length to form a distributed-loop sensor.
Claim 2
Dependent Claim
117 words
A magnetic-core, flexible, H-plane sensor for ELF communications comprising: small-circumference, longitudinal insert means; first ribbon means of magnetic material wound in a clockwise fashion down the length of said insert means; second ribbon means of magnetic material wound in a counterclockwise fashion down the length of said insert means so that said first and second ribbon means cross each other at a plurality of good-mechanical-contact points down the length of said insert means; insulation means wrapped around said first and second ribbon means down the length of said insert means so that said ribbon means are insulated from the outer environment; and conductor means wrapped around said insulator means down its length to form a distributed-loop sensor.
Claim 3
Dependent Claim
20 words
A magnetic-core sensor as defined in claim 1 wherein said insert means is an insulator insert for support purposes only.
Claim 4
Dependent Claim
73 words
A magnetic core sensor as defined in claim 1 wherein said insert means comprises a first wire conductor with an electrically insulating layer therearound for insulating said first wire conductor from said first and second ribbon means, and, wherein said conductor means comprises a second wire conductor that is helically wrapped around said insulation means down its length and connected at its end to said first wire conductor to complete the antenna circuit.
Claim 5
Dependent Claim
159 words
A magnetic core for a flexible H-plane sensor for ELF communications comprising: small circumference, longitudinal insert means; a plurality of first ribbon means of magnetic material; a plurality of second ribbon means of magnetic material, said plurality of first ribbon means interwoven in a braid-like fashion with said plurality of second ribbon means around and down the length of said insert means so that said first ribbon means are braidedly wound in a clockwise manner while said second ribbon means are braidedly wound in a counterclockwise fashion and a plurality of good-mechanical-contact points are formed at the first and second ribbon cross-over points in the braid down the length of said insert means; insulation means wrapped around said plurality of braided first and second ribbon means down the length of said insert so that said ribbon means are insulated from the outer environment; and conductor means wrapped around said insulator means down its length to for- a distributed-loop sensor.
Claim 6
Dependent Claim
159 words
A magnetic core for a flexible H-plane sensor for ELF communications comprising: small circumference, longitudinal insert means; a plurality of first ribbon means of magnetic material; a plurality of second ribbon means of magnetic material, said plurality of first ribbon means interwoven in a braid-like fashion with said plurality of second ribbon means around and down the length of said insert means so that said first ribbon means are braidedly wound in a clockwise manner while said second ribbon means are braidedly wound in a counterclockwise fashion and a plurality of good-mechanical-contact points are formed at the first and second ribbon cross-over points in the braid down the length of said insert means; insulation means wrapped around said plurality of braided first and second ribbon means down the length of said insert so that said ribbon means are insulated from the outer environment; and conductor means wrapped around said insulator means down its length to for- a distributed-loop sensor.
Claim 7
Independent Claim
134 words
A method for forming around a long center insert a magnetic-core, flexible, H-plane sensor for ELF communication comprising the steps of: winding a first conductor of magnetic material around and down the length of said center insert in a clockwise direction; winding a second conductor of magnetic material around and down the length of said center insert in a counterclockwise direction so that said first and second conductors cross each other at a plurality of good-mechanical-contact points distributed around the circumference and down the length of said center insert; wrapping an insulating material around the first and second conductor windings down the length of said center insert so that said conductors are insulated from the outer environment; and winding a conductor means around said insulating material down its length to form a distributed-loop sensor.
Claim 8
Independent Claim
134 words
A method for forming around a long center insert a magnetic-core, flexible, H-plane sensor for ELF communication comprising the steps of: winding a first conductor of magnetic material around and down the length of said center insert in a clockwise direction; winding a second conductor of magnetic material around and down the length of said center insert in a counterclockwise direction so that said first and second conductors cross each other at a plurality of good-mechanical-contact points distributed around the circumference and down the length of said center insert; wrapping an insulating material around the first and second conductor windings down the length of said center insert so that said conductors are insulated from the outer environment; and winding a conductor means around said insulating material down its length to form a distributed-loop sensor.
Claim 9
Dependent Claim
14 words
A sensor as in claim 5, wherein said first and second conductors are ribbons.
Claim 10
Independent Claim
105 words
A method for forming a magnetic-core, flexible, H-plane sensor for ELF communication around a long center insert comprising the steps of: weaving a plurality of ribbons of magnetic material in a braid-like fashion around said center insert so that a plurality of good mechanical contact points between the ribbons are formed around the circumference and down the length of said center insert; wrapping an insulating material around the braided ribbons down the length of said center insert so that said ribbons are insulated from the outer environment; and winding a conductor means around said insulating material down its length to form a distributed loop sensor.
Claim 11
Independent Claim
105 words
A method for forming a magnetic-core, flexible, H-plane sensor for ELF communication around a long center insert comprising the steps of: weaving a plurality of ribbons of magnetic material in a braid-like fashion around said center insert so that a plurality of good mechanical contact points between the ribbons are formed around the circumference and down the length of said center insert; wrapping an insulating material around the braided ribbons down the length of said center insert so that said ribbons are insulated from the outer environment; and winding a conductor means around said insulating material down its length to form a distributed loop sensor.
References Cited (Backward Citations)
US3068477A
Cited
DE1926259A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |