US4390815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for influencing electron beam movement
Assignee: RCA Licensing Corp
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Filing: 1981-03-17
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Granted: 1983-06-28
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Expires: 2001-03-17
Abstract
Abstract An apparatus for influencing the movement of electron beams of a cathode ray tube comprises means for magnetizing a strip of magnetizable material disposed about the neck of the tube. The magnetizing means includes a pair of members each incorporating magnetizing coils. Means including a hinge is coupled to the members for providing a first opened position of the members for placing the magnetization on the tube neck and a second closed position of the members for encircling the tube neck. A source of magnetizing current is coupled to the magnetizing coils for developing magnetic fields in the vicinity of the coils for magnetizing the magnetizable strip.
Inventors
- 👤 Charles W. Key
- 👤 II Edward W. Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:37
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/44; H01F; H01F13/00; H01F13/003
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
155 words
Apparatus for influencing movement of electron beams in a cathode ray tube, comprising: means for magnetizing a strip of magnetizable material disposed about the neck of said tube to produce permanently magnetized regions on said strip for influencing the movement of said beams, comprising: a first member incorporating first magnetizing coils; a second member separate from said first member and incorporating second magnetizing coils coupled to said first coils; means coupled to said first and second members for selectively providing a first opened position of said members for placing said magnetizing means on said tube neck from a position substantially perpendicular to said tube neck and a second closed position of said members with said magnetizing means encircling said neck; a source of magnetizing current; and means coupling said source of magnetizing current to said first and second magnetizing coils for developing magnetic fields in the vicinity of said coils for magnetizing said magnetizable strip.
Claim 2
Dependent Claim
155 words
Apparatus for influencing movement of electron beams in a cathode ray tube, comprising: means for magnetizing a strip of magnetizable material disposed about the neck of said tube to produce permanently magnetized regions on said strip for influencing the movement of said beams, comprising: a first member incorporating first magnetizing coils; a second member separate from said first member and incorporating second magnetizing coils coupled to said first coils; means coupled to said first and second members for selectively providing a first opened position of said members for placing said magnetizing means on said tube neck from a position substantially perpendicular to said tube neck and a second closed position of said members with said magnetizing means encircling said neck; a source of magnetizing current; and means coupling said source of magnetizing current to said first and second magnetizing coils for developing magnetic fields in the vicinity of said coils for magnetizing said magnetizable strip.
Claim 3
Dependent Claim
22 words
The arrangement defined in claim 1, wherein said first and second members each comprises a semi-circular neck-encircling portion and a handle portion.
Claim 4
Dependent Claim
22 words
The arrangement defined in claim 1, wherein said means for selectively providing first and second positions of said members comprises a hinge.
Claim 5
Dependent Claim
24 words
The arrangement defined in claim 3, further comprising biasing means coupled to said members for normally maintaining said members in said second closed position.
Claim 6
Dependent Claim
13 words
The arrangement defined in claim 4, wherein said biasing means comprises a spring.
Claim 7
Dependent Claim
35 words
The arrangement defined in claim 1, wherein said members comprise indexing means adapted to cooperate with said cathode ray tube for providing a predetermined radial orientation of said coils with respect to said tube neck.
Claim 8
Dependent Claim
18 words
The arrangement defined in claim 1, wherein said magnetizing coils establish a two-pole magnetic field in said strip.
Claim 9
Dependent Claim
20 words
The arrangement defined in claim 1, wherein said coils establish a four-pole and a six-pole magnetic field in said strip.
Claim 10
Independent Claim
149 words
A method for influencing movement of electron beams in a cathode ray tube, comprising the steps of: placing a strip of magnetizable material about the neck of said tube; placing a magnetizing apparatus about said tube neck adjacent said strip from a position substantially perpendicular to said tube neck, said apparatus comprising: a first member incorporating first magnetizing coils; a second member incorporating second magnetizing coils coupled to said first coils; means coupled to said first and second members for selectively providing a first opened position of said members for placing said magnetizing means on said tube neck and a second closed position of said members with said magnetizing means encircling said tube neck; providing a source of magnetizing current; and coupling said source of magnetizing current to said first and second magnetizing coils for developing magnetic fields in the vicinity of said coils for magnetizing said magnetizable strip.
Claim 11
Independent Claim
149 words
A method for influencing movement of electron beams in a cathode ray tube, comprising the steps of: placing a strip of magnetizable material about the neck of said tube; placing a magnetizing apparatus about said tube neck adjacent said strip from a position substantially perpendicular to said tube neck, said apparatus comprising: a first member incorporating first magnetizing coils; a second member incorporating second magnetizing coils coupled to said first coils; means coupled to said first and second members for selectively providing a first opened position of said members for placing said magnetizing means on said tube neck and a second closed position of said members with said magnetizing means encircling said tube neck; providing a source of magnetizing current; and coupling said source of magnetizing current to said first and second magnetizing coils for developing magnetic fields in the vicinity of said coils for magnetizing said magnetizable strip.
Claim 12
Independent Claim
132 words
A method for influencing movement of electron beams in a cathode ray tube, comprising the steps of: placing a strip of magnetizable material about the neck of said tube; opening a magnetizing apparatus comprising: a first member incorporating first magnetizing coils; a second member incorporating second magnetizing coils coupled to said first coils; and hinge means coupling said first and second members such that said first and second members pivot with respect to each other about said hinge means; placing said magnetizing apparatus about said tube neck; closing said apparatus such that said first and second magnetizing coils are adjacent said magnetizable strip; and coupling a source of magnetizing current to said first and second magnetizing coils for developing magnetic fields in the vicinity of said coils for magnetizing said magnetizable strip.
Claim 13
Independent Claim
132 words
A method for influencing movement of electron beams in a cathode ray tube, comprising the steps of: placing a strip of magnetizable material about the neck of said tube; opening a magnetizing apparatus comprising: a first member incorporating first magnetizing coils; a second member incorporating second magnetizing coils coupled to said first coils; and hinge means coupling said first and second members such that said first and second members pivot with respect to each other about said hinge means; placing said magnetizing apparatus about said tube neck; closing said apparatus such that said first and second magnetizing coils are adjacent said magnetizable strip; and coupling a source of magnetizing current to said first and second magnetizing coils for developing magnetic fields in the vicinity of said coils for magnetizing said magnetizable strip.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |