Patent US3622927A successfully refreshed from Google Patents.
US3622927A
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US
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Deflection yoke
Assignee: Individual
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Filing: 1970-01-20
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Granted: 1971-11-23
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Expires: 1990-01-20
Abstract
Abstract Several substantially circular deflection yoke structures for cathode-ray tubes are disclosed. Their common principal characteristics include means whereby the features of orthogonal (x, y) deflection axes are identical. This results in symmetry about the diagonal (45*) deflection positions as well as about the deflection axes. These structures each employ eight identical toroidally wound coil segments. Four coils, symmetrically placed on both sides of the x-axis, provide x-axis deflection. Four coils similarly located with respect to the y-axis provide y-axis deflection. Each coil occupies a 45* segment from its axis outwardly along an annular core piece.
Inventors
- 👤 Clayton A Washburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:31
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/72; H01J29/76; H01J29/766; H01J29/764
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
115 words
A deflection yoke providing a magnetic field suitable for beam deflection, comprising in combination: toroidal coils symmetrically wound in a first plurality of angular segments adjacent to a first axis of deflection for contributing to the magnetic field in a given direction to deflect the beam in the direction of said first axis of deflection, and means positioned substantially totally within a second plurality of angular segments, each angular segment of said second plurality of angular segments constituting the complement of a corresponding one of said angular segments of said first plurality of angular segments, said means contributing to the magnetic field in said given direction to render said field substantially uniform throughout said yoke.
Claim 2
Dependent Claim
115 words
A deflection yoke providing a magnetic field suitable for beam deflection, comprising in combination: toroidal coils symmetrically wound in a first plurality of angular segments adjacent to a first axis of deflection for contributing to the magnetic field in a given direction to deflect the beam in the direction of said first axis of deflection, and means positioned substantially totally within a second plurality of angular segments, each angular segment of said second plurality of angular segments constituting the complement of a corresponding one of said angular segments of said first plurality of angular segments, said means contributing to the magnetic field in said given direction to render said field substantially uniform throughout said yoke.
Claim 3
Dependent Claim
21 words
A deflection yoke in accordance with claim 1, in which the toroidal coils have substantially linear distribution within 45* angular segments.
Claim 4
Dependent Claim
37 words
A deflection yoke in accordance with claim 1, and having substantial length, wherein said means comprises pole pieces at one end and saddle coils having portions thereof at the other end to control the deflection field distribution.
Claim 5
Dependent Claim
32 words
A deflection yoke in accordance with claim 1, in which said means comprises a pair of pole pieces whose dimensions are proportioned to control the field distribution of said magnetic field component.
Claim 6
Dependent Claim
48 words
A short deflection yoke in accordance with claim 4, in which the toroidal coils are positioned at radius R with respect to a beam axis, and in which each pole piece extends for a distance approximately equal to R/2 in a direction substantially parallel to said beam axis.
Claim 7
Dependent Claim
27 words
A deflection yoke in accordance with claim 5, in which each pole piece includes a dimension in a direction toward said beam axis approximately equal to R/8.
Claim 8
Dependent Claim
33 words
A deflection yoke in accordance with claim 1, and having substantial length, in which the toroidal coil turns have a distribution function which is shifted from front to rear along the yoke length.
Claim 9
Dependent Claim
51 words
A deflection yoke in accordance with claim 7, in which the turns of each coil at one end of the yoke are uniformly distributed, and the turns of each coil at the other end are distributed in proportion to the cosine of the angle of any turn from a reference position.
Claim 10
Dependent Claim
31 words
A deflection yoke in accordance with claim 1, in which the toroidal coils adjacent to the first axis of deflection comprise four toroidal coil segments wound on an annular magnetic core.
Claim 11
Dependent Claim
36 words
A deflection yoke in accordance with claim 9, including a pair of saddle coils positioned opposite each other and centered orthogonally to said deflection axis, each saddle coil occupying a pair of said complementary angular segments.
Claim 12
Dependent Claim
40 words
A deflection yoke in accordance with claim 9, having a second axis of deflection substantially perpendicular to said first deflection axis, and including four additional toroidal coil segments symmetrically wound in complementary angular segments adjacent to said second deflection axis.
Claim 13
Dependent Claim
31 words
A deflection yoke in accordance with claim 11, including two pairs of pole pieces, the pole pieces of each pair being positioned substantially opposite each other on a corresponding deflection axis.
Claim 14
Dependent Claim
40 words
A deflection yoke in accordance with claim 11, in which said means positioned substantially totally within complementary angular segments comprises two pairs of saddle coils, the coils of each pair being positioned substantially opposite each other on a deflection axis.
Claim 15
Dependent Claim
34 words
A deflection yoke in accordance with claim 1, having a desired angular turns distribution which is provided by said toroidal coils within their angular segments and by saddle coils within the complementary angular segments.
Claim 16
Dependent Claim
33 words
A deflection yoke in accordance with claim 14, in which the desired angular turns distribution is proportional to the cosine of the angular position of a coil turn referred to the deflection axis.
Claim 17
Dependent Claim
33 words
A deflection yoke in accordance with claim 14, in which at least one of the saddle coils comprises a lumped coil of uniform distribution positioned to most closely approximate the desired distribution function.
Claim 18
Dependent Claim
47 words
A deflection yoke in accordance with claim 16, in which each toroidal coil segment is 45*, each saddle coil occupies a 90* segment and comprises a single coil of uniform turns distribution which subtends an angular segment of about 0.56 radian adjacent the corresponding toroidal coil segments.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |