US3727159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic convergence device for use in an in-line type color cathode ray tube
Assignee: Toshiba Corp
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Filing: 1972-03-17
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Granted: 1973-04-10
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Expires: 1992-03-17
Abstract
Abstract A mounting plate having first and second arcuate slits is mounted on the neck portion of an in-line type color cathode ray tube. On both surfaces of the mounting plate are slidably disposed first and second arcuate racks and first and second magnetic convergence units each having an E-shaped convergence core, by means of screws passing through the arcuate slits. First and second pinions geared to the arcuate racks are fixed to one end of first and second shafts rotatably fitted to the mounting plate, the other end of the shafts being fixed to the first and second adjusting wheels.
Inventors
- 👤 S Takenaka
- 👤 K Idaka
- 👤 Y Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:17
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
A magnetic convergence device for use in an in-line type color cathode ray tube comprising a nonmagnetic mounting plate having first and second arcuate slits and a plurality of split pieces being clamped by a clamping means so as to fix said mounting plate on the outer surface of the neck portion of said cathode ray tube; first and second magnetic convergence units positioned on one surface of said mounting plate; and means for adjustably fitting said magnetic convergence units to permit their displacement along said arcuate slits, each of said magnetic convergence units having a nonmagnetic frame, a dynamic convergence electromagnet including an E-shaped core and two disc-shaped permanent magnets associated with said electromagnet.
Claim 2
Dependent Claim
115 words
A magnetic convergence device for use in an in-line type color cathode ray tube comprising a nonmagnetic mounting plate having first and second arcuate slits and a plurality of split pieces being clamped by a clamping means so as to fix said mounting plate on the outer surface of the neck portion of said cathode ray tube; first and second magnetic convergence units positioned on one surface of said mounting plate; and means for adjustably fitting said magnetic convergence units to permit their displacement along said arcuate slits, each of said magnetic convergence units having a nonmagnetic frame, a dynamic convergence electromagnet including an E-shaped core and two disc-shaped permanent magnets associated with said electromagnet.
Claim 3
Dependent Claim
93 words
A magnetic convergence device as claimed in claim 1 wherein said means for adjustably fitting said magnetic convergence units comprise first and second arcuate racks positioned on the other surface of said mounting plate; connecting means for connecting a pair of arcuate racks to a pair of magnetic convergence units through said arcuate slits; first and second pinions geared to said arcuate racks and fixed to one end of first and second shafts rotatably disposed on said mounting plate; and first and second adjusting wheels fixed to the other end of said shafts.
Claim 4
Dependent Claim
55 words
A magnetic convergence device as claimed in claim 1 wherein said means for adjustably fitting said magnetic convergence units comprises a plurality of screws for fixing said magnetic convergence units to said mounting plate through said arcuate slits, the diameter of the head of the screw being larger than the width of the arcuate slit.
Claim 5
Dependent Claim
32 words
A magnetic convergence device as claimed in claim 2 wherein said adjusting wheel is graduated on the periphery to indicate the rotating position of said magnetic convergence units on said mounting plate.
References Cited (Backward Citations)
US3021445A
Cited
US3305807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |