US3601731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil form for a magnetic deflection york
Assignee: International Business Machines Corp
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Filing: 1970-01-30
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Granted: 1971-08-24
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Expires: 1990-01-30
Abstract
Abstract A magnetic deflection yoke has internal longitudinal slots and two end caps. Each of the end caps has hook members to allow a deflection yoke to be wound with each wire in each coil being precisely positioned to reduce deflection distortion. The core may be cylindrical or tapered in shape. A flattened trumpetshaped wire feeder is used for feeding wire under tension between the end caps and hooking the wire behind them.
Inventors
- 👤 William R Christiana
- 👤 Joseph F Hevesi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:07
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/72; H01J29/76; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/071; H01F2041/0711; H01J2209/00; H01J2209/236; H01J2209/2363; H01J2209/2366
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
An electromagnetic deflection yoke for deflecting an electron beam, comprising: a core portion; first and second end caps, one of said end caps at each end of said core portion, wherein said end caps comprise a plurality of hook members separated by a plurality of slots, said plurality of slots being aligned to form troughs along the axis of said core portion; a plurality of windings for carrying electrical current, the longitudinal portions of said windings being placed in said plurality of slots for precise positioning of said longitudinal portions and end portions being held by said hook members to reduce defocusing and distortion.
Claim 2
Dependent Claim
104 words
An electromagnetic deflection yoke for deflecting an electron beam, comprising: a core portion; first and second end caps, one of said end caps at each end of said core portion, wherein said end caps comprise a plurality of hook members separated by a plurality of slots, said plurality of slots being aligned to form troughs along the axis of said core portion; a plurality of windings for carrying electrical current, the longitudinal portions of said windings being placed in said plurality of slots for precise positioning of said longitudinal portions and end portions being held by said hook members to reduce defocusing and distortion.
Claim 3
Dependent Claim
32 words
An electromagnetic deflection yoke as in claim 1 wherein said core portion comprises magnetic core material formed with a plurality of longitudinal slots spaced around the inner perimeter of said magnetic core.
Claim 4
Dependent Claim
16 words
An electromagnetic deflection yoke as in claim 2 wherein said core portion has a cylindrical form.
Claim 5
Dependent Claim
45 words
An electromagnetic deflection yoke as in claim 1 wherein said core portion comprises a plurality of magnetic ring portions of a first character separated by a plurality of spacer ring portions of a different character to shape the magnetic flux pattern produced by said yoke.
Claim 6
Dependent Claim
55 words
An electromagnetic deflection yoke as in claim 1 wherein said core portion comprises a tapered magnetic core body; said first end cap further comprises an extension which includes a plurality of troughs formed by slots along the inner surface of said extension, said extension being mounted on the inner perimeter of said magnetic core body.
Claim 7
Dependent Claim
57 words
An electromagnetic deflection yoke as in claim 1 wherein each of said end caps contains a plurality of radially directed hook members spaced around the perimeter of said end caps shaped to define annular troughs operative to hold the end portions of said windings in a precise position outwardly displaced from said longitudinal portions of said windings.
Claim 8
Dependent Claim
89 words
An electromagnetic yoke for use on a cathode-ray tube comprising: a core element; a longitudinal winding alignment means on said core element directed along the inner surface of said core element; a plurality of windings defining a coil, the longitudinal portions of said windings being located by said alignment means to extend along the inner surface of said core element, and transverse winding retraining means on said core element, the end portions of said windings extending beyond said core element and being held in position by said retaining means.
Claim 9
Dependent Claim
89 words
An electromagnetic yoke for use on a cathode-ray tube comprising: a core element; a longitudinal winding alignment means on said core element directed along the inner surface of said core element; a plurality of windings defining a coil, the longitudinal portions of said windings being located by said alignment means to extend along the inner surface of said core element, and transverse winding retraining means on said core element, the end portions of said windings extending beyond said core element and being held in position by said retaining means.
Claim 10
Dependent Claim
32 words
An electromagnetic yoke as in claim 7, wherein said yoke is for use on a cathode-ray tube having a flaring bell portion, said core element being flared to fit said bell portion.
Claim 11
Dependent Claim
24 words
An electromagnetic yoke as in claim 7 wherein said longitudinal winding alignment beams are uniformly spaced around the inner surface of said core element.
References Cited (Backward Citations)
US3310763A
Cited
US3430169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |