US3801941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil winding
Assignee: Plessey Handel und Investments AG
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Filing: 1973-01-26
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Granted: 1974-04-02
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Expires: 1993-01-26
Abstract
Abstract A cone-shaped magnetic core structure for receiving toroidal beam deflection coils for use with cathode ray tubes. The magnetic core structure has attached to the respective front and rear ends thereof relatively large and small diameter grooved insulating structures. The grooves in the insulating structure are mutually arranged so that in one pair of opposite quadrants looking along the central axis of the core grooves of the rear insulating structure are aligned with even-numbered grooves in the front insulating structure. In the other pair of opposite quadrants the grooves of the rear insulating structure are aligned with odd-numbered grooves of the front insulating structure.
Inventors
- 👤 P Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/72; H01J29/76; H01J29/764
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
A magnetic core structure of generally truncated-core shape for receiving toroidal beam deflection coils of cathode-ray tubes, said magnetic structure having attached to it grooved front and rear insulating structures of relatively large and small diameters for receiving the turns of said coils, in which the grooves in the insulating structure are mutually arranged so that in one pair of opposite quadrants looking along the control axis of the core grooves of the rear insulating structure are aligned with even-numbered grooves in the front insulating structure and in the other pair of opposite quadrants grooves of the rear insulating structure are aligned with odd-numbered grooves of the front insulating structure.
Claim 2
Dependent Claim
110 words
A magnetic core structure of generally truncated-core shape for receiving toroidal beam deflection coils of cathode-ray tubes, said magnetic structure having attached to it grooved front and rear insulating structures of relatively large and small diameters for receiving the turns of said coils, in which the grooves in the insulating structure are mutually arranged so that in one pair of opposite quadrants looking along the control axis of the core grooves of the rear insulating structure are aligned with even-numbered grooves in the front insulating structure and in the other pair of opposite quadrants grooves of the rear insulating structure are aligned with odd-numbered grooves of the front insulating structure.
Claim 3
Dependent Claim
42 words
A magnetic core structure as claimed in claim 1, in which the alignment between grooves in the rear and front insulating structures is achieved by modifying the spacing between the grooves in the rear insulating structure close to the boundaries between quadrants.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |