US3626345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiofrequency transformer
Assignee: Toko Inc
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Filing: 1970-09-25
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Granted: 1971-12-07
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Expires: 1990-09-25
Abstract
Abstract A radiofrequency transformer having a metal outer case of a given cross section for enclosing coils therein and has a magnetic shield comprising four rods of a magnetic material each interposed and held between a respective corner of the outer case and a corresponding corner of a rigid inner case.
Inventors
- 👤 Kyuzaemon Funaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:45
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0153; H03H7/0161; H03H7/0169; H03H7/0184; H01; H01F; H01F27/00; H01F27/34; H01F27/36; H01F27/366
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
In a radiofrequency transformer having a metal outer case for shielding coils enclosed therein and aligned on an axis, the improved combination therewith of a rigid inner case, a magnetic shield comprising at least two bars of magnetic material interposed and held between the outer case and the rigid inner case and orientated in directions parallel to said axis.
Claim 2
Dependent Claim
59 words
In a radiofrequency transformer having a metal outer case for shielding coils enclosed therein and aligned on an axis, the improved combination therewith of a rigid inner case, a magnetic shield comprising at least two bars of magnetic material interposed and held between the outer case and the rigid inner case and orientated in directions parallel to said axis.
Claim 3
Dependent Claim
50 words
The combination as claimed in claim 1 in which the outer case has rounded outwardly corners and arcuate concave corners recessed inwardly, the bars of magnetic material comprising four round rods each held between a respective corner of the outer case and a corresponding concave corner of the inner case.
Claim 4
Dependent Claim
17 words
The combination as claimed in claim 1 in which the magnetic material is a rigid magnetic material.
Claim 5
Dependent Claim
17 words
The combination as claimed in claim 2 in which the magnetic material is a rigid magnetic material.
Claim 6
Dependent Claim
25 words
The combination as claimed in claim 1 in which the magnetic material is a flexible material containing particles of a magnetic material with uniform distribution.
Claim 7
Dependent Claim
25 words
The combination as claimed in claim 2 in which the magnetic material is a flexible material containing particles of a magnetic material with uniform distribution.
Claim 8
Dependent Claim
73 words
The combination as claimed in claim 1 in which the outer case has a substantially square cross section with corners rounded outwardly, and the inner case has a corresponding square cross section with arcuate concave corners recessed inwardly, the bars of magnetic material comprising two rods held between respective rounded corners of the outer case and corresponding concave corners of the inner case at diagonally opposite corners of the outer and inNer cases.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |