Patent US3913043A successfully refreshed from Google Patents.
US3913043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflection device for a color television display tube
Assignee: US Philips Corp
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Filing: 1974-10-01
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Granted: 1975-10-14
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Expires: 1994-10-01
Abstract
Abstract A deflection device for a color television display tube having three electron beams which extend in one plane, comprising two pairs of ferromagnetic control members which are diametrically arranged and which are rotatable about the tube neck, and which serve for the adjustment of the quantity of magnetic flux applied from the stray field of the deflection coils to the electron beams.
Inventors
- 👤 Cornelis Johannes He Paridaens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:33
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/18; H04N9/20; H04N9/28; H01J2229/00; H01J2229/56; H01J2229/568; H01J2229/5681; H01J2229/5684
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A deflection device for a color television display tube, which includes a device for generating three electron beams which are situated in substantially one plane and two parallel ferromagnetic correction plates, arranged between the central beam path on the one side and each of the outer two beam paths on the other side, the edges of the plates parallel to the beam paths being bent outwards, comprising two pairs of softferromagnetic control members which are diametrically arranged with respect to the tube neck and which extend approximately at the area of the correction plates along the circumference of the tube neck at angles of less than 90*, the said pairs being rotable about the tube neck.
Claim 2
Dependent Claim
116 words
A deflection device for a color television display tube, which includes a device for generating three electron beams which are situated in substantially one plane and two parallel ferromagnetic correction plates, arranged between the central beam path on the one side and each of the outer two beam paths on the other side, the edges of the plates parallel to the beam paths being bent outwards, comprising two pairs of softferromagnetic control members which are diametrically arranged with respect to the tube neck and which extend approximately at the area of the correction plates along the circumference of the tube neck at angles of less than 90*, the said pairs being rotable about the tube neck.
Claim 3
Dependent Claim
59 words
A device as claimed in claim 1, wherein the control members are flat plates in the form of identical arcs of a cricle of less than 90* which are coaxial with respect to the tube neck, the two pairs being separately connected to the two facing sides of two non-magnetic annular discs which are rotatable about the tube neck.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |