US3872399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular l-c filter
Assignee: Arris Technology Inc
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Filing: 1974-04-12
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Granted: 1975-03-18
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Expires: 1994-04-12
Abstract
Abstract A filter includes a plurality of electrically connected modular L-C circuits. Each of the L-C circuits comprises a core in the shape of a toroid around which a conductor is wound a given number of times to define a winding. A capacitor is provided physically situated within the opening associated with the core and electrically connected to the conductor to form a portion of one of the turns of the core winding. The capacitor is so electrically connected to the conductor and so physically oriented relative to the core that current flowing through the turn which is partially formed by the capacitor induces a magnetic field in the core in the same sense as current flowing through the conductor.
Inventors
- 👤 Vincent P Friberg
- 👤 John Chesney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:13
CPC Classifications
H; H03; H03H; H03H1/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
An L-C circuit comprising a core in the shape of a toroid substantially surrounding an opening, a conductor, said conductor being wound around said core a given number of turns to define a winding, and a capacitor physically situated within the opening associated with said core and electrically connected to said conductor to form a portion of a turn around said core.
Claim 2
Dependent Claim
62 words
An L-C circuit comprising a core in the shape of a toroid substantially surrounding an opening, a conductor, said conductor being wound around said core a given number of turns to define a winding, and a capacitor physically situated within the opening associated with said core and electrically connected to said conductor to form a portion of a turn around said core.
Claim 3
Dependent Claim
51 words
The circuit of claim 1 wherein said capacitor is so electrically connected to said conductor and so physically oriented relative to said core that current flowing through said turn partially formed by said capacitor induces a magnetic field in said core in the same sense as current flowing through said conductor.
Claim 4
Dependent Claim
122 words
An L-C circuit comprising a core in the shape of a toroid substantially surrounding an opening, a conductor having first and second ends, said conductor being wound around said core a given number of turns in a given direction to form an inductor such that current flows therethrough in a given direction, a capacitor physically situated within the opening associated with said core and comprising two plates each with its representative lead connected thereto, one lead of said capacitor and said first end of said conductor being electrically connected together to one side of said core, the other lead of said capacitor being located to the other side of said core whereby said capacitor will form an additional turn of said conductor.
Claim 5
Dependent Claim
122 words
An L-C circuit comprising a core in the shape of a toroid substantially surrounding an opening, a conductor having first and second ends, said conductor being wound around said core a given number of turns in a given direction to form an inductor such that current flows therethrough in a given direction, a capacitor physically situated within the opening associated with said core and comprising two plates each with its representative lead connected thereto, one lead of said capacitor and said first end of said conductor being electrically connected together to one side of said core, the other lead of said capacitor being located to the other side of said core whereby said capacitor will form an additional turn of said conductor.
Claim 6
Dependent Claim
55 words
The circuit of claim 3 further comprising a base upon which said core is mounted, and first, second and third terminals also mounted on said core, said first end being electrically connected to said first terminal and said second end and said other lead being electrically connected to said second and said third terminals, respectively.
Claim 7
Dependent Claim
40 words
The circuit of claim 4 wherein one of said terminals is operably connected to ground and wherein said capacitor is a tubular capacitor having an inner plate and an outer plate, said inner plate being connected to said grounded terminal.
Claim 8
Dependent Claim
33 words
The circuit of claim 4 further comprising an external circuit having a high impedance end and a low impedance end and means for electrically connecting said outer plate to said high impedance end.
Claim 9
Dependent Claim
93 words
A filter assembly comprising at least two L-C circuits each of which comprises a core in the shape of a toroid substantially surrounding an opening, a conductor, said conductor being wound around said core a given number of turns in a given direction to define a winding and a capacitor physically situated within the opening associated with said core and electrically connected to said conductor to form a portion of a turn around said core, said circuits being operably connected together through a node, said node being connected to ground through an inductor.
Claim 10
Dependent Claim
93 words
A filter assembly comprising at least two L-C circuits each of which comprises a core in the shape of a toroid substantially surrounding an opening, a conductor, said conductor being wound around said core a given number of turns in a given direction to define a winding and a capacitor physically situated within the opening associated with said core and electrically connected to said conductor to form a portion of a turn around said core, said circuits being operably connected together through a node, said node being connected to ground through an inductor.
References Cited (Backward Citations)
US2892162A
Cited
US3555466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |