Patent US3340443A successfully refreshed from Google Patents.
US3340443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television degaussing apparatus
Assignee: Packard Bell Electronics Corp
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Filing: 1964-04-30
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Granted: 1967-09-05
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Expires: 1984-04-30
Abstract
No abstract record available.
Inventors
- 👤 Harold F Rieth
- 👤 O'leary George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:04
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/29; H01; H01J; H01J2229/00; H01J2229/0007; H01J2229/0046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN A COLOR TELEVISION RECEIVER, A COLOR PICTURE TUBE HAVING A DISPLAY FACE WITH A PLURALITY OF DIFFERENT PHOSPHORS DISTRIBUTED ACROSS THE DISPLAY FACE, SAID PHOSHORS IN THE PLURALITY BEING EFFECTIVE TO LUMINESCE WITH VISIBLE LIGHT OF PARTICULAR COLORS WHEN BOMBARDED BY ELECTRONS; ELECTRON MEANS FOR SCANNING THE DISPLAY FACE WITH ELECTRONS TO EXCITE THE PHOSHOR INTO LUMINESCING WITH THE PARTICULAR COLORS; A MASK DISPOSED IN SAID TUBE BETWEEN THE FACE AND SAID ELECTRON MEANS, SAID MASK BEING POSITIONED TO SHIELD THE DIFFERENT PHOSPHORS IN THE PLURALITY FROM ELECTRONS REPRESENTING DIFFERENT COLORS; AT LEAST A PAIR OF COILS POSITIONED ADJACENT THE MASK AT SPACED POSITIONS AND EXTENDING IN A DIRECTION TRANSVERSE TO THE MASK TO PRODUCE A MAGNETIC FLUX FIELD IN THE MASK WITHOUT ANY DEAD SPOT ANY POSITION ON THE FACE OF THE COLOR PICTURE TUBE, AND MEANS COUPLED TO THE PAIR OF COILS FOR ENERGIZING THE COILS WITH A SIGNAL OF DECAYING INTENSITY TO GRADUALLY REDUCE THE INTENSITY OF THE MAGNETIC FLUX FIELD IN SAID MASK AND DEGAUSS THE COLOR PICTURE TUBE.
Claim 2
Dependent Claim
174 words
IN A COLOR TELEVISION RECEIVER, A COLOR PICTURE TUBE HAVING A DISPLAY FACE WITH A PLURALITY OF DIFFERENT PHOSPHORS DISTRIBUTED ACROSS THE DISPLAY FACE, SAID PHOSHORS IN THE PLURALITY BEING EFFECTIVE TO LUMINESCE WITH VISIBLE LIGHT OF PARTICULAR COLORS WHEN BOMBARDED BY ELECTRONS; ELECTRON MEANS FOR SCANNING THE DISPLAY FACE WITH ELECTRONS TO EXCITE THE PHOSHOR INTO LUMINESCING WITH THE PARTICULAR COLORS; A MASK DISPOSED IN SAID TUBE BETWEEN THE FACE AND SAID ELECTRON MEANS, SAID MASK BEING POSITIONED TO SHIELD THE DIFFERENT PHOSPHORS IN THE PLURALITY FROM ELECTRONS REPRESENTING DIFFERENT COLORS; AT LEAST A PAIR OF COILS POSITIONED ADJACENT THE MASK AT SPACED POSITIONS AND EXTENDING IN A DIRECTION TRANSVERSE TO THE MASK TO PRODUCE A MAGNETIC FLUX FIELD IN THE MASK WITHOUT ANY DEAD SPOT ANY POSITION ON THE FACE OF THE COLOR PICTURE TUBE, AND MEANS COUPLED TO THE PAIR OF COILS FOR ENERGIZING THE COILS WITH A SIGNAL OF DECAYING INTENSITY TO GRADUALLY REDUCE THE INTENSITY OF THE MAGNETIC FLUX FIELD IN SAID MASK AND DEGAUSS THE COLOR PICTURE TUBE.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |