US3376450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnets assembly means for correction of pincushion distortion in cathode ray tubes
Assignee: TDK Micronas GmbH
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Filing: 1966-08-24
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Granted: 1968-04-02
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Expires: 1986-08-24
Abstract
No abstract record available.
Inventors
- 👤 Chester A Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:04
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A VACUUM TUBE PRODUCING A BEAM OF ELECTRONS WHICH IS DEFLECTED IN A MANNER TO FORM A DESIRED IMAGE ON A FLUORESCENT SCREEN, A DEVICE FOR MODIFYING THE GEOMETRIC SHAPE OF THE IMAGE COMPRISING: A MOUNTING PLATE FOR SURROUNDING A PORTION OF THE TUBE THROUGH WHICH THE BEAM PASSES; A PAIR OF SPACED SPRING RETAINERS ATTACHED TO SAID PLATE; A RETAINING ELEMENT ATTACHED TO AND EXTENDING BETWEEN SAID SPRING RETAINERS; A PERMANENT MAGNET CLAMPED BETWEEN SAID ELEMENT AND SAID PLATE AS URGED BY SAID SPRING RETAINERS, THE DIMENSIONAL RELATION OF SAID ELEMENT AND RETAINERS BEING SUCH AS TO PERMIT SAID MAGNET TO BE POSITIONED IN ALL DIRECTIONS IN A PLANE PARALLEL TO SAID PLATE AND TO PERMIT SAID MAGNET TO BE ROTATED ON ITS OWN AXIS.
Claim 2
Dependent Claim
127 words
IN A VACUUM TUBE PRODUCING A BEAM OF ELECTRONS WHICH IS DEFLECTED IN A MANNER TO FORM A DESIRED IMAGE ON A FLUORESCENT SCREEN, A DEVICE FOR MODIFYING THE GEOMETRIC SHAPE OF THE IMAGE COMPRISING: A MOUNTING PLATE FOR SURROUNDING A PORTION OF THE TUBE THROUGH WHICH THE BEAM PASSES; A PAIR OF SPACED SPRING RETAINERS ATTACHED TO SAID PLATE; A RETAINING ELEMENT ATTACHED TO AND EXTENDING BETWEEN SAID SPRING RETAINERS; A PERMANENT MAGNET CLAMPED BETWEEN SAID ELEMENT AND SAID PLATE AS URGED BY SAID SPRING RETAINERS, THE DIMENSIONAL RELATION OF SAID ELEMENT AND RETAINERS BEING SUCH AS TO PERMIT SAID MAGNET TO BE POSITIONED IN ALL DIRECTIONS IN A PLANE PARALLEL TO SAID PLATE AND TO PERMIT SAID MAGNET TO BE ROTATED ON ITS OWN AXIS.
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) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |