Patent US4656451A successfully refreshed from Google Patents.
US4656451A
Expired / Lapsed
US
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Electronic noise suppressor
Assignee: FERRONICS INCORPORATED EAST ROCHESTER NEW YORK A CORP OF NEW YORK
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Filing: 1986-01-23
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Granted: 1987-04-07
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Expires: 2006-01-23
Abstract
Abstract An electronic noise suppressor has a U-shaped wire or other conductor passing through two stacked ferrite beads. The bead near the legs of the conductor is of high frequency impedance and the bead at the head of the U is of low frequency impedance. The legs of the U-shaped conductor are connected into an electronic circuit in which noise is to be suppressed.
Inventors
- 👤 Thomas F. Pomponio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:53
CPC Classifications
H; H01; H01F; H01F3/00; H01F3/10; H01F17/00; H01F17/04; H01F17/06; H01F2017/048; H01F2017/065; H01F2017/067
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A device for broadband attenuation of high frequency electronic circuitry noise comprising a bead having a first core body of a first ferrite having characteristically high frequency impedance, a second core body of a second ferrite having characteristically low frequency impedance, said first and second core bodies being stacked one on another, closely spaced passages through both of said bodies and a U-shaped conductor fitted within and through said passages, passing from one end of said conductor first through said first body, next through said second body and then reversing back through said second body and through and exiting from said first body, and a resin coating binding said core bodies and conductor firmly into a double wired bead.
Claim 2
Independent Claim
119 words
A device for broadband attenuation of high frequency electronic circuitry noise comprising a bead having a first core body of a first ferrite having characteristically high frequency impedance, a second core body of a second ferrite having characteristically low frequency impedance, said first and second core bodies being stacked one on another, closely spaced passages through both of said bodies and a U-shaped conductor fitted within and through said passages, passing from one end of said conductor first through said first body, next through said second body and then reversing back through said second body and through and exiting from said first body, and a resin coating binding said core bodies and conductor firmly into a double wired bead.
Claim 3
Independent Claim
123 words
A device for broadband attenuation of electronic circuitry noise in a frequency range between about 5 MHz and about 500 MHz said device comprising a bead having a first core body of a first ferrite having characteristically high impedance within the upper portion of said frequency range, a second core body of a second ferrite having characteristically high impedance within the lower portion of said frequency range, closely spaced passages through both of said bodies and a U-shaped conductor fitted within and through said passages, passing through first mating passages in both of said bodies and reversing back through second mating passages in both of said bodies, and a resin coating binding said core bodies and conductor firmly into a double wired bead.
Claim 4
Independent Claim
123 words
A device for broadband attenuation of electronic circuitry noise in a frequency range between about 5 MHz and about 500 MHz said device comprising a bead having a first core body of a first ferrite having characteristically high impedance within the upper portion of said frequency range, a second core body of a second ferrite having characteristically high impedance within the lower portion of said frequency range, closely spaced passages through both of said bodies and a U-shaped conductor fitted within and through said passages, passing through first mating passages in both of said bodies and reversing back through second mating passages in both of said bodies, and a resin coating binding said core bodies and conductor firmly into a double wired bead.
Claim 5
Dependent Claim
30 words
The device of claim 2, wherein said broadband attenuation range is between about 5 MHz and about 500 MHz, and wherein said broadband attenuation is substantially flat throughout said range.
Claim 6
Dependent Claim
24 words
The device of claim 1, wherein said first ferrite is a nickel zinc ferrite and wherein said second ferrite is a manganese zinc ferrite.
Claim 7
Dependent Claim
35 words
The device of claim 2, wherein said second core body is positioned at the U-shaped portion of said conductor and wherein said first core body is positioned toward the extending legs of said U-shaped conductor.
References Cited (Backward Citations)
US1880805A
Cited
US3613033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |