US5172080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Garnet centering ring for circulators and isolators
Assignee: Radio Frequency Systems Inc
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Filing: 1991-06-28
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Granted: 1992-12-15
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Expires: 2011-06-28
Abstract
Abstract In a circulator/isolator device used in a cellular transmission network, a centering ring is used to position the garnets with respect to the center conductor, magnets and pole piece. The clamping action of the housing holds the unit together. Because the ring centers all components, additional fixtures are not needed and inaccurate "eyeballing" by the assembler is eliminated. The garnets are held in place during assembly by the centering ring thereby eliminating the need for adhesive or dielectric grease. 0
Inventors
- 👤 David S. Fisher
- 👤 Warren H. Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:59
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
111 words
A positioning device for centering a magnetic field source relative to at least one ferrite wafer and a center conductor in a device for directing radio frequencies, comprising: a main body portion for retaining the magnetic field source; and means on said main body portion dimensionally sized to position the at least one ferrite wafer and a portion of the center conductor relative to the magnetic field source, said means to position includes land portions extending radially inwardly form one end of said main body portion, whereby the at least one ferrite wafer and the portion of the center conductor are positioned within a magnetic field of the magnetic field source.
Claim 2
Dependent Claim
111 words
A positioning device for centering a magnetic field source relative to at least one ferrite wafer and a center conductor in a device for directing radio frequencies, comprising: a main body portion for retaining the magnetic field source; and means on said main body portion dimensionally sized to position the at least one ferrite wafer and a portion of the center conductor relative to the magnetic field source, said means to position includes land portions extending radially inwardly form one end of said main body portion, whereby the at least one ferrite wafer and the portion of the center conductor are positioned within a magnetic field of the magnetic field source.
Claim 3
Dependent Claim
23 words
A positioning device in accordance with claim 1, wherein said main body portion is dimensionally sized to receive the magnetic field source therewithin.
Claim 4
Dependent Claim
27 words
A positioning device in accordance with claim 2, wherein said main body portion is in the form of an annulus and the magnetic field source fits therewithin.
Claim 5
Dependent Claim
38 words
A positioning device in accordance with claim 3, wherein said land portions have inwardly facing abutment surfaces which align with sides of the at least one ferrite wafer to position the same relative to the magnetic field source.
Claim 6
Dependent Claim
24 words
A positioning device in accordance with claim 3, wherein said land portions are dimensionally sized to provide a seat for the magnetic field source.
Claim 7
Dependent Claim
38 words
A positioning device in accordance with claim 1, wherein said land portions have inwardly facing abutment surfaces which align with sides of the at least one ferrite wafer to position the same relative to the magnetic field source.
Claim 8
Dependent Claim
29 words
A positioning device in accordance with claim 1, wherein said land portions are dimensionally sized to provide a seat for the magnetic field source within said main body portion.
Claim 9
Independent Claim
194 words
A device for directing radio frequencies comprising: A. a housing forming n enclosure; B. at least two radio frequency transmission lines extending into said enclosure of said housing; C. a central conductor within said enclosure electrically connecting said liens with one another; D. at least one ferrite wafer within said enclosure adjacent a portion of said central conductor; E. a magnetic field source within said enclosure providing a magnetic field around said at least one ferrite wafer and said portion of said central conductor; and F. a positioning device for centering said magnetic field source relative to said at least one ferrite wafer and said center conductor, said positioning device including a main body portion for retaining said magnetic field source and means on said main body portion dimensionally sized to position said at least one ferrite wafer and said portion of said center conductor relative to said magnetic field source, said means to position includes land portions extending radially inwardly form one end of said main body portion, whereby said at least one ferrite wafer and said portion of said center conductor are positioned within the magnetic field of said magnetic field source.
Claim 10
Independent Claim
194 words
A device for directing radio frequencies comprising: A. a housing forming n enclosure; B. at least two radio frequency transmission lines extending into said enclosure of said housing; C. a central conductor within said enclosure electrically connecting said liens with one another; D. at least one ferrite wafer within said enclosure adjacent a portion of said central conductor; E. a magnetic field source within said enclosure providing a magnetic field around said at least one ferrite wafer and said portion of said central conductor; and F. a positioning device for centering said magnetic field source relative to said at least one ferrite wafer and said center conductor, said positioning device including a main body portion for retaining said magnetic field source and means on said main body portion dimensionally sized to position said at least one ferrite wafer and said portion of said center conductor relative to said magnetic field source, said means to position includes land portions extending radially inwardly form one end of said main body portion, whereby said at least one ferrite wafer and said portion of said center conductor are positioned within the magnetic field of said magnetic field source.
Claim 11
Dependent Claim
26 words
A device for directing radio frequencies in accordance with claim 8, wherein said main body portion is dimensionally sized to receive said magnetic field source therewithin.
Claim 12
Dependent Claim
30 words
A device for directing radio frequencies in accordance with claim 9, wherein said main body portion is in the form of an annulus and said magnetic field source fits therewithin.
Claim 13
Dependent Claim
41 words
A device for directing radio frequencies in accordance with claim 10, wherein said land portions have inwardly facing abutment surfaces which align with sides of said at least one ferrite wafer to position the same relative to said magnetic field source.
Claim 14
Dependent Claim
32 words
A device for directing radio frequencies in accordance with claim 10, wherein said land portions are dimensionally sized to provide a seat for said magnetic field source within said main body portion.
Claim 15
Dependent Claim
41 words
A device for directing radio frequencies in accordance with claim 8, wherein said land portions have inwardly facing abutment surfaces which align with sides of said at least one ferrite wafer to position the same relative to said magnetic field source.
Claim 16
Dependent Claim
30 words
A device for directing radio frequencies in accordance with claim 13, wherein said at least one ferrite wafer is two ferrite wafer which sandwich said portion of said central conductor.
Claim 17
Dependent Claim
34 words
A device for directing radio frequencies in accordance with claim 14, wherein in said two ferrite wafers and said portion of said central conductor are positioned between said abutment surfaces of said land portions.
Claim 18
Dependent Claim
22 words
A device for directing radio frequencies in accordance with claim 15, wherein said magnetic field source abuts one of said ferrite wafers.
Claim 19
Dependent Claim
32 words
A device for directing radio frequencies in accordance with claim 8, wherein said land portions are dimensionally sized to provide a seat for said magnetic field source within the main body portion.
Claim 20
Dependent Claim
23 words
A device for directing radio frequencies in accordance with claim 17, wherein said magnetic field source abuts said at least one ferrite wafer.
Claim 21
Dependent Claim
43 words
A device for directing radio frequencies in accordance with claim 18, wherein said magnetic field source includes a magnet and a pole piece for providing a uniform magnetic field around said at least one ferrite wafer and said portion of said central conductor.
Claim 22
Dependent Claim
22 words
A device for directing radio frequencies in accordance with claim 19, wherein said pole piece abuts said at least one ferrite wafer.
Claim 23
Dependent Claim
23 words
A device for directing radio frequencies in accordance with claim 8, wherein said magnetic field source abuts said at least one ferrite wafer.
Claim 24
Dependent Claim
43 words
A device for directing radio frequencies in accordance with claim 21, wherein said magnetic field source includes a magnet and a pole piece for providing a uniform magnetic field around said at least one ferrite wafer and said portion of said central conductor.
Claim 25
Dependent Claim
22 words
A device for directing radio frequencies in accordance with claim 22, wherein said pole piece abuts said at least one ferrite water.
Claim 26
Dependent Claim
39 words
A device for directing radio frequencies in accordance with claim 8, wherein said main body portion of said positioning device is dimensionally sized to fit within said housing and prevent relative movement between said housing and said positioning device.
Claim 27
Dependent Claim
29 words
A device for directing radio frequencies in accordance with claim 24, wherein said main body portion has protrusions thereon which matingly engage said housing to prevent relative movement therebetween.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-15 | 1996-06-15 | 1996-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-15 | 2000-06-15 | 2000-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-15 | 2004-06-15 | 2004-12-15 | $7700.00 | Window Closed / Lapsed |