Patent US3758888A successfully refreshed from Google Patents.
US3758888A
Expired / Lapsed
US
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Toroidal deflection yoke
Assignee: Panasonic Holdings Corp
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Filing: 1972-03-07
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Granted: 1973-09-11
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Expires: 1992-03-07
Abstract
Abstract A toroidal deflection yoke comprising a toroidal core, a pair of guide rings mounted on the toroidal core, each guide ring having a plurality of coil isolating partitions formed thereon, and horizontal and vertical deflection coils disposed between these partitions in such a manner that they are isolated from each other.
Inventors
- 👤 T Kadota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:26
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/72; H01J29/76; H01J29/764
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A toroidal deflection yoke, comprising: an annular core of a magnetic material; deflection coil guide means provided at the opposite ends of said annular coil and having a plurality of blade-shaped partitions extending radially and longitudinally of said annular core, said partitions dividing said core into a plurality of blocks; and a plurality of deflection coil portions, each portion comprising a plurality of turns wound in a corresponding one of said blocks, said partitions having a height larger than the full height of the plurality of turns of each coil portion would in the block form by adjacent partitions.
Claim 2
Dependent Claim
99 words
A toroidal deflection yoke, comprising: an annular core of a magnetic material; deflection coil guide means provided at the opposite ends of said annular coil and having a plurality of blade-shaped partitions extending radially and longitudinally of said annular core, said partitions dividing said core into a plurality of blocks; and a plurality of deflection coil portions, each portion comprising a plurality of turns wound in a corresponding one of said blocks, said partitions having a height larger than the full height of the plurality of turns of each coil portion would in the block form by adjacent partitions.
Claim 3
Dependent Claim
61 words
A toroidal deflection yoke as claimed in claim 6, in which said guide means comprises two annular guide rings, one disposed at each end of said annular core and each having a plurality of said blade-shaped partitions extending radially and longitudinally of the annular core so as to divide the outer periphery of said annular core into a plurality of blocks.
Claim 4
Dependent Claim
28 words
A toroidal deflection yoke as claimed in claim 6, in which said plurality of partitions provided on each of said guide means are equally spaced from each other.
Claim 5
Dependent Claim
91 words
The toroidal deflection yoke defined in claim 1, wherein said deflection coil portions comprise respective portions of horizontal and vertical deflection coils for an electron beam tube, and wherein the spacing between adjacent blade-shaped partitions between which one coil portion of one of said horizontal and vertical deflection coils is wound decreases from a maximum at the location of the coil portion forming the center of said one of said horizontal and vertical deflection coils to a minimum at the furthest circumferentially distant ends of said one coil from said center.
Claim 6
Dependent Claim
33 words
The toroidal deflection yoke defined in claim 4, wherein the coil portions forming said horizontal deflection coil are wound in said blocks in alternating relation with the portions forming said vertical deflection coil.
Claim 7
Dependent Claim
43 words
The toroidal deflection yoke defined in claim 5, wherein the height of all of said coil portions in their respective blocks is substantially the same around the circumference of said annular core, the winding distribution being in the form of a cosine distribution.
Claim 8
Dependent Claim
53 words
The toroidal deflection yoke defined in claim 6, wherein said deflection coil portions comprise respective portions of horizontal and vertical deflection coils for an electron beam tube and wherein the coil portions forming said horizontal deflection coil are wound in said blocks in alternating relation with coil portions forming said vertical dEflection coil.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |