Patent US3793602A successfully refreshed from Google Patents.
US3793602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convergence device for short neck in-line cathode ray tube
Assignee: RCA Licensing Corp
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Filing: 1973-04-13
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Granted: 1974-02-19
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Expires: 1993-04-13
Abstract
Abstract A pair of convergence devices lying in a single plane generate and direct fluxes for imparting both horizontal and vertical motion to the outer electron beams in a planar array of three color beams to obtain convergence of the beams. The single magnetic device for each outer beam is a combination of the normal U-shaped device for controlling horizontal movement and the E-shaped device for controlling vertical movement. By the selection and placement of flux controlling means, such as air gaps, isolation between the fluxes is achieved.
Inventors
- 👤 J Lister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:57
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
In a color television receiver including a cathode ray tube having a neck portion containing electron gun means for producing a planar array of electron beams, a convergence assembly for converging the outer ones of said beams, comprising: a pair of flux conductive means located adjacent said neck portion proximate to respective outer ones of said beams and lying in a single plane orthogonal to said planar array and radial to the axis of said neck portion, said flux conductive means each having first flux generating means for generating flux imparting horizontal motion to the proximate outer one of said beams and second flux generating means for generating flux imparting vertical motion to the proximate outer one of said beams, said flux conductive means each including flux controlling means to mutually isolate the fluxes generated by said first and second generating means.
Claim 2
Dependent Claim
142 words
In a color television receiver including a cathode ray tube having a neck portion containing electron gun means for producing a planar array of electron beams, a convergence assembly for converging the outer ones of said beams, comprising: a pair of flux conductive means located adjacent said neck portion proximate to respective outer ones of said beams and lying in a single plane orthogonal to said planar array and radial to the axis of said neck portion, said flux conductive means each having first flux generating means for generating flux imparting horizontal motion to the proximate outer one of said beams and second flux generating means for generating flux imparting vertical motion to the proximate outer one of said beams, said flux conductive means each including flux controlling means to mutually isolate the fluxes generated by said first and second generating means.
Claim 3
Dependent Claim
49 words
The convergence assembly recited in claim 1 wherein said flux conductive means each includes E-shaped flux conductive means for predominantly conducting the flux imparting vertical motion to the proximate outer beam and U-shaped flux conductive means for predominantly conducting the flux imparting horizontal motion to the proximate outer beam.
Claim 4
Dependent Claim
32 words
The convergence assembly recited in claim 2 wherein said flux controlling means include air gap means positioned to optimize isolation between said E-shaped flux conductive means and said U-shaped flux conductive means.
Claim 5
Dependent Claim
73 words
The convergence assembly recited in claim 3 wherein said E-shaped flux conductive means and said U-shaped flux conductive means are superposed such that the U-shaped flux conductive means comprises the outer legs and base of said E-shaped flux conductive means and the E-shaped flux conductive means includes a center leg, said center leg including air gap means separating said center leg from said base to minimize interference with said flux imparting horizontal motion.
Claim 6
Dependent Claim
62 words
The convergence assembly recited in claim 4 wherein said first flux generating means is a magnet adjustably positioned at the base of said U-shaped flux conductive means to control said flux imparting horizontal motion and said second flux generating means is a magnet adjustably positioned in the center leg of said E-shaped flux conductive means to control said flux imparting vertical motion.
Claim 7
Dependent Claim
36 words
The convergence assembly recited in claim 2 wherein said U-shaped flux conductive means includes said first flux generating means, said first flux generating means comprising magnet means positioned to adjustably control said flux imparting horizontal motion.
Claim 8
Dependent Claim
36 words
The convergence assembly recited in claim 6 wherein said E-shaped flux conductive means includes said second flux generating means, said second flux generating means comprising magnet means positioned to adjustably control said flux imparting vertical motion.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |