US4198614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflection yoke assembly including a beam positioning magnet arrangement
Assignee: RCA Licensing Corp
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Filing: 1978-11-06
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Granted: 1980-04-15
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Expires: 1998-11-06
Abstract
Abstract A deflection yoke assembly includes a permanent magnet arrangement comprising first and second magnets magnetically coupled to act as a single magnet with variable strength by means of a magnetic shunt structure including castellated portions disposed adjacent to the two magnets.
Inventors
- 👤 Frank R. Ragland, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:04
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0273; H01F7/0278; H01F3/00; H01F3/10; H01F3/12; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702; H01J29/703
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A deflection yoke assembly for a cathode ray tube including a permanent magnet arrangement disposed relative to the deflection coils of said yoke for modifying the deflection field affecting an electron beam passing through the yoke, said arrangement comprising: first and second magnets each having opposite magnetic pole regions; and a magnetic field shunt structure disposed relative to said magnets for causing said magnets to appear substantially as a single magnet having opposite magnetic pole regions, said structure including castellated members disposed adjacent to said magnets for linking the magnetic fields of said magnets.
Claim 2
Dependent Claim
94 words
A deflection yoke assembly for a cathode ray tube including a permanent magnet arrangement disposed relative to the deflection coils of said yoke for modifying the deflection field affecting an electron beam passing through the yoke, said arrangement comprising: first and second magnets each having opposite magnetic pole regions; and a magnetic field shunt structure disposed relative to said magnets for causing said magnets to appear substantially as a single magnet having opposite magnetic pole regions, said structure including castellated members disposed adjacent to said magnets for linking the magnetic fields of said magnets.
Claim 3
Dependent Claim
36 words
A deflection yoke assembly according to claim 1 wherein said magnets are cylindrical and at least one of said magnets is rotatable in relation to said castellated members to vary the strength of the magnetic field.
Claim 4
Dependent Claim
27 words
A deflection yoke assembly acccording to claim 2 wherein said magnets include opposite pole regions in a plane orthogonal to the central axis of said cylindrical magnets.
Claim 5
Dependent Claim
21 words
A deflection yoke assembly according to claim 3 wherein said castellated members extend parallel to the central axis of said magnets.
Claim 6
Dependent Claim
22 words
A deflection yoke assembly according to claim 4 wherein said castellated members are disposed around substantially the whole circumference of said magnets.
Claim 7
Dependent Claim
25 words
A deflection yoke assembly according to claim 5 wherein said castellated members are of substantially the same width measured around the circumference of said magnets.
Claim 8
Dependent Claim
37 words
A deflection yoke assembly according to claim 5 wherein at least one of said castellated members is of a substantially different width measured around the circumference of said magnets relative to the other of said castellated members.
Claim 9
Dependent Claim
43 words
A deflection yoke assembly according to claim 4 wherein said castellated members exert pressure against at least one of said magnets to enable rotation of said at least one magnet and to retain said at least one magnet in a desired rotational position.
Claim 10
Dependent Claim
50 words
A deflection yoke assembly according to claim 4 wherein said castellated members are disposed at one end thereof in a cylindrical recess in said yoke assembly for enabling rotation of said members and magnets relative to said recess and for retaining said members and magnets in a desired rotational position.
References Cited (Backward Citations)
US2854598A
Cited
US2900544A
Cited
US2941102A
Cited
US2963609A
Cited
US3701065A
Cited
US3899710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |