Patent US3819984A successfully refreshed from Google Patents.
US3819984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side-by-side dual gun crt having horizontal deflector plates provided with side shields for correction of geometric distortion
Assignee: Tektronix Inc
•
Filing: 1973-02-12
•
Granted: 1974-06-25
•
Expires: 1993-02-12
Abstract
Abstract A cathode ray tube having dual electron beam guns and associated deflection means is described in which the electron beam guns are disposed in a plane containing the tube axis and such that the electron beam guns are located in planes spaced to the left and right of the tube axis which are normal to the first mentioned plane so that the electron beam guns are parallel to provide asymmetrical horizontal scanning thereby requiring less space in the tube neck. The horizontal deflection plate means is provided with side shields which provides dynamic geometry correction as the tube is operated.
Inventors
- 👤 K Hawken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:43
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702; H01J29/705; H01J29/72; H01J29/74; H01J29/80
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
83 words
An electron beam apparatus comprising: an evacuated envelope having target means; dual electron gun means disposed side-by-side in said envelope on each side of a central axis of said envelope and spaced from said target means for generating electron beams therefrom; and deflection means for each of said dual electron gun means disposed between said electron gun means and said target means for deflecting said electron beams over said target means in accordance with signal voltages applied thereto to provide image displays thereover.
Claim 2
Dependent Claim
83 words
An electron beam apparatus comprising: an evacuated envelope having target means; dual electron gun means disposed side-by-side in said envelope on each side of a central axis of said envelope and spaced from said target means for generating electron beams therefrom; and deflection means for each of said dual electron gun means disposed between said electron gun means and said target means for deflecting said electron beams over said target means in accordance with signal voltages applied thereto to provide image displays thereover.
Claim 3
Dependent Claim
19 words
An electron beam apparatus according to claim 1 wherein said dual electron gun means are parallel to each other.
Claim 4
Dependent Claim
27 words
An electron beam apparatus according to claim 1 wherein said deflection means are disposed to deflect said electron beams over said target means in simultaneous overlapping relationship.
Claim 5
Dependent Claim
90 words
An electron beam apparatus according to claim 1 wherein said deflection means comprise vertical deflection means and horizontal deflection means with the vertical and horizontal deflection means for one of said dual electron gun means deflecting the electron beam thereof a small angle and then a large angle during a horizontal scanning operation thereof and with the vertical and horizontal deflection means for the other of said dual electron gun meaNs deflecting the electron beam thereof a large angle and then a small angle during a horizontal scanning operation thereof.
Claim 6
Dependent Claim
25 words
An electron beam apparatus according to claim 1 wherein means are provided by said deflection means to correct for trapezoidal deflection of said electron beams.
Claim 7
Dependent Claim
25 words
An electron beam apparatus according to claim 5 wherein said means provided by said deflection means comprise side shield means for horizontal deflection means thereof.
Claim 8
Dependent Claim
27 words
An electron beam apparatus according to claim 6 wherein said side shield means is integrally connected to one of the horizontal plates of said horizontal deflection means.
Claim 9
Dependent Claim
98 words
A cathode ray tube comprising: an evacuated envelope having target means; electron gun means disposed in said envelope for generating electron beam means and being spaced from said target means; deflection means disposed in said envelope between said target means and said electron gun means and including vertical and horizontal deflection plate means for deflecting said electron beam means over said target means in accordance with signal voltages applied to said vertical and horizontal deflection plate means; and side shield means provided by said horizontal deflection plate means for correction of trapezoidal distortion of said electron beam means.
Claim 10
Dependent Claim
98 words
A cathode ray tube comprising: an evacuated envelope having target means; electron gun means disposed in said envelope for generating electron beam means and being spaced from said target means; deflection means disposed in said envelope between said target means and said electron gun means and including vertical and horizontal deflection plate means for deflecting said electron beam means over said target means in accordance with signal voltages applied to said vertical and horizontal deflection plate means; and side shield means provided by said horizontal deflection plate means for correction of trapezoidal distortion of said electron beam means.
Claim 11
Dependent Claim
23 words
A cathode ray tube according to claim 8 wherein said electron gun means comprise dual electron gun means disposed side-by-side in said envelope.
Claim 12
Dependent Claim
22 words
A cathode ray tube according to claim 8 wherein said side shield means are integrally connected to said horizontal deflection plate means.
Claim 13
Dependent Claim
37 words
A cathode ray tube according to claim 8 wherein said electron gun means comprise dual electron gun means and said deflection means comprise independent vertical and horizontal deflection means for each of said dual electron gun means.
Claim 14
Dependent Claim
39 words
A horizontal deflection system for an electron beam apparatus comprising: spaced plate means having rear sections and forward sections; and side shield means disposed at right angles relative to at least said forward sections and covering the gap therebetween.
Claim 15
Dependent Claim
39 words
A horizontal deflection system for an electron beam apparatus comprising: spaced plate means having rear sections and forward sections; and side shield means disposed at right angles relative to at least said forward sections and covering the gap therebetween.
Claim 16
Dependent Claim
22 words
A horizontal deflection system according to claim 12 wherein said side shield means are integrally connected to one of said plate means.
Claim 17
Dependent Claim
38 words
A horizontal deflection system according to claim 12 wherein said plate means comprise pairs of spaced plate means disposed in alignment and said side shield means are integrally connected to outer plate members which extend toward each other.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |