US3435269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin cathode ray tube with array of planar vertical deflection elements
Assignee: LEO A SHANAFELT
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Filing: 1965-10-23
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Granted: 1969-03-25
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Leo A Shanafelt
- 👤 Abraham Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:04
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/72; H01J29/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN A CATHODE RAY TUBE HAVING AN ENVELOPE, A TARGET SCREEN IN SAID ENVELOPE AND AN ARRAY OF PLANAR VERTICAL DEFLECTION ELEMENTS DISPOSED SUBSTANTIALLY ADJACENT TO A SURFACE SPACED FROM AND OPPOSITE TO SAID TARGET SCREEN TO CONTROL VERTICAL SWEEP OF AN ELECTRON BEAM IN THE PROVISION OF A RASTER ON SAID TARGET SCREEN, AN ELECTRON GUN IN A SYMMETRICAL POSITION WITH RESPECT TO THE ENDS OF SAID VERTICAL DEFLECTION ELEMENTS, BELOW SAID ELEMENTS, FOR INJECTING AN ELECTRON BEAM BETWEEN SAID ELEMENTS AND SAID TARGET SCREEN, MEANS FOR SCANNING SAID BEAM IN A FAN-SHAPED PATTERN BETWEEN SAID ARRAY AND SAID TARGET SCREEN, SAID PATTERN BEING IN A PLANE IF VOLTAGES ON SAID ELEMENTS AND SAID SCREEN ARE EQUAL, EACH OF SAID VERTICAL DEFLECTION ELEMENTS HAVING AN UPPER AND LOWER EDGE AND HAVING AT LEAST ONE OF SAID EDGES CURVED FOR ALTERING THE ELECTROSTATIC FIELD BETWEEN SAID VERTICAL DEFLECTION ARRAY AND SAID TARGET SCREEN TO STRAIGHTEN THE HORIZONTAL LINES OF SAID RASTER.
Claim 2
Dependent Claim
161 words
IN A CATHODE RAY TUBE HAVING AN ENVELOPE, A TARGET SCREEN IN SAID ENVELOPE AND AN ARRAY OF PLANAR VERTICAL DEFLECTION ELEMENTS DISPOSED SUBSTANTIALLY ADJACENT TO A SURFACE SPACED FROM AND OPPOSITE TO SAID TARGET SCREEN TO CONTROL VERTICAL SWEEP OF AN ELECTRON BEAM IN THE PROVISION OF A RASTER ON SAID TARGET SCREEN, AN ELECTRON GUN IN A SYMMETRICAL POSITION WITH RESPECT TO THE ENDS OF SAID VERTICAL DEFLECTION ELEMENTS, BELOW SAID ELEMENTS, FOR INJECTING AN ELECTRON BEAM BETWEEN SAID ELEMENTS AND SAID TARGET SCREEN, MEANS FOR SCANNING SAID BEAM IN A FAN-SHAPED PATTERN BETWEEN SAID ARRAY AND SAID TARGET SCREEN, SAID PATTERN BEING IN A PLANE IF VOLTAGES ON SAID ELEMENTS AND SAID SCREEN ARE EQUAL, EACH OF SAID VERTICAL DEFLECTION ELEMENTS HAVING AN UPPER AND LOWER EDGE AND HAVING AT LEAST ONE OF SAID EDGES CURVED FOR ALTERING THE ELECTROSTATIC FIELD BETWEEN SAID VERTICAL DEFLECTION ARRAY AND SAID TARGET SCREEN TO STRAIGHTEN THE HORIZONTAL LINES OF SAID RASTER.
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) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |