US4606729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a deflection unit for color television display tubes which is pre-adjusted for color purity
Assignee: US Philips Corp
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Filing: 1980-10-27
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Granted: 1986-08-19
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Expires: 2000-10-27
Abstract
Abstract A deflection unit for a color television display tube comprising line and frame deflection coils and a magnet core cooperating with said coils can be manufactured by placing the deflection coils and the magnet core around the part of the transition neck-cone of a color display tube in such manner that the deflection coils engage or substantially engage the tube, which display tube comprises an adjusted color purity magnet, after which the tube is adjusted so as to be color pure by moving the magnet core along the axis of the tube, after which, if desired, the magnet core is moved in known manner in a plane perpendicular to the tube axis so as to remove convergence errors and the magnet core and the coils are then connected together to form the deflection unit.
Inventors
- 👤 Albert J. Kuiper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:59
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/82; H01J29/823; H01J29/826; H01J29/70; H01J29/72; H01J29/76; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/071; H01F2041/0711
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A method of manufacturing a deflection unit for a color television display tube of the type having a neck portion containing means for generating a plurality of electron beams and a cone portion with a display screen remote from said neck portion, and further having a pre-adjusted color purity magnet, said deflection unit comprising line and field deflection coils and a magnet core which cooperates with said deflection coils, said method comprising placing said deflection coils around the transition neck-cone of said color display tube in such manner that said deflection coils substantially engage the tube, placing said magnet core over said deflection coils, adjusting said tube so as to be color pure by energizing said deflection coils and display tube and moving said magnet core along the longtitudinal axis of said tube with respect to said deflection coils to adjust for color purity, and securing together said magnet core and said deflection coils.
Claim 2
Independent Claim
154 words
A method of manufacturing a deflection unit for a color television display tube of the type having a neck portion containing means for generating a plurality of electron beams and a cone portion with a display screen remote from said neck portion, and further having a pre-adjusted color purity magnet, said deflection unit comprising line and field deflection coils and a magnet core which cooperates with said deflection coils, said method comprising placing said deflection coils around the transition neck-cone of said color display tube in such manner that said deflection coils substantially engage the tube, placing said magnet core over said deflection coils, adjusting said tube so as to be color pure by energizing said deflection coils and display tube and moving said magnet core along the longtitudinal axis of said tube with respect to said deflection coils to adjust for color purity, and securing together said magnet core and said deflection coils.
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1, wherein said deflection coils and said magnet core are secured together by pouring or spraying a curing and/or hardening synthetic resin between said deflection coils and said magnet core.
Claim 4
Dependent Claim
35 words
A method for manufacturing a deflection unit as claimed in claim 1 which further comprises moving said magnet core in a plane perpendicular to the tube axis to remove convergence errors in the tube display.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |