US3725831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic beam adjusting arrangements
Assignee: RCA Licensing Corp
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Filing: 1972-01-14
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Granted: 1973-04-03
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Expires: 1992-01-14
Abstract
Abstract A pair of four-pole magnet rings, each mounted for independent, concentric rotational adjustment about the neck of an in-line, tri-beam shadow-mask color kinescope, constitute a facility for introducing mutually opposing shifts of the outer beams of the in-line trio in any desired direction, without substantially affecting the central, axial beam, and without requiring internal pole piece structures for field directing purposes. A pair of 6pole magnet rings, each mounted for independent, concentric rotational adjustment about an adjacent region of the color kinescope neck, constitute an additional facility for introducing like-direction shifts of the outer beams of the in-line trio in any desired direction, without substantially affecting the central beam, and without requiring internal pole piece structures for field directing purposes. The two magnet ring pairs together provide an arrangement for effecting static convergence of the beam trio at the kinescope screen. A third pair of two-pole magnet rings, similarly subject to rotational adjustment about the kinescope neck, provide means for introducing like-direction shifts of all three beams in any desired direction for conventional purity adjustment purposes. In a preferred application of the invention, the two-pole ring pair, six-pole ring pair and four-pole ring pair, appear in axially spaced relation of a common mount surrounding the kinescope neck to the rear of a deflection yoke (with the ring pairs in the order named, progressing from the neck base toward the yoke rear) and constitute the only neck components (exclusive of the deflection yoke) required in set-up and operation of the color kinescope.
Inventors
- 👤 R Barbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:33
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702; H01J29/703
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
The combination comprising: a tri-beam color kinescope having a cylindrical neck enclosing a trio of in-line beam paths, a central one of said in-line beam paths substantially coinciding with the longitudinal axis of said neck with the remaining outer ones of said in-line beam paths being substantially symmetrically disposed on opposite sides of said axis, and with all of said in-line beam paths traversing a region of the interior of said neck which is free of magnetizable structures; a first adjustable magnetic field producing means mounted on said neck for causing mutually opposing shifts of said outer beam paths in said region without substantially disturbing said central beam path; and a second adjustable magnetic field producing means mounted on said neck for causing like direction shifts of said outer beam paths in said region without substantially disturbing said central beam path.
Claim 2
Dependent Claim
141 words
The combination comprising: a tri-beam color kinescope having a cylindrical neck enclosing a trio of in-line beam paths, a central one of said in-line beam paths substantially coinciding with the longitudinal axis of said neck with the remaining outer ones of said in-line beam paths being substantially symmetrically disposed on opposite sides of said axis, and with all of said in-line beam paths traversing a region of the interior of said neck which is free of magnetizable structures; a first adjustable magnetic field producing means mounted on said neck for causing mutually opposing shifts of said outer beam paths in said region without substantially disturbing said central beam path; and a second adjustable magnetic field producing means mounted on said neck for causing like direction shifts of said outer beam paths in said region without substantially disturbing said central beam path.
Claim 3
Dependent Claim
38 words
A combination in accordance with claim 1 wherein: said first field producing means developing a quadripolar field pattern in said region; and said second field producing means comprises means for developing a sextipolar field pattern in said region.
Claim 4
Dependent Claim
54 words
A combination in accordance with claim 2 wherein: said quadripolar field pattern developing means comprises a pair of four-pole magnet rings encircling a portion of said region; and said sextipolar field pattern developing means comprises a pair Of six-pole magnet rings encircling a second portion of said region axially spaced from said first-named region.
Claim 5
Dependent Claim
19 words
A combination in accordance with claim 3 wherein all of said magnet rings comprise individually rotatable permanent magnet rings.
Claim 6
Dependent Claim
103 words
In combination, an in-line, tri-beam, shadow-mask color kinescope having a cylindrical neck, a region of the interior of said neck being substantially free of magnetizable structures; a cylindrical support encircling said neck region; a pair of two-pole magnet rings, each magnetized across a ring diameter; a pair of four-pole magnet rings, each having poles, alternating in polarity, at 90* intervals about the ring periphery; and a pair of six-pole magnet rings, each having poles, alternating in polarity, at 60* intervals about the ring periphery; said ring pairs being mounted for rotation concentrically about said support at respective longitudinally spaced locations on said support.
Claim 7
Dependent Claim
103 words
In combination, an in-line, tri-beam, shadow-mask color kinescope having a cylindrical neck, a region of the interior of said neck being substantially free of magnetizable structures; a cylindrical support encircling said neck region; a pair of two-pole magnet rings, each magnetized across a ring diameter; a pair of four-pole magnet rings, each having poles, alternating in polarity, at 90* intervals about the ring periphery; and a pair of six-pole magnet rings, each having poles, alternating in polarity, at 60* intervals about the ring periphery; said ring pairs being mounted for rotation concentrically about said support at respective longitudinally spaced locations on said support.
Claim 8
Dependent Claim
72 words
Apparatus in accordance with claim 5 also including a deflection yoke mounted on said neck, said four-pole magnet rings being mounted on said support in a location adjacent to said defection yoke, said two-pole magnet rings being mounted on said support in a location remote from said deflection yoke, and said six-pole magnet rings being mounted on said support in a location intermediate the locations of said two-pole and four-pole magnet rings.
Claim 9
Dependent Claim
150 words
The combination comprising: a tri-beam color kinescope having a cylindrical neck enclosing a trio of in-line beam paths, a central one of said in-line beam paths substantially coinciding with the longitudinal axis of said neck with the remaining outer ones of said in-line beam paths being substantially symmetrically disposed on opposite sides of said axis, and with all of said in-line beam paths traversing a region of the interior of said neck which is free of magnetizable structures; a pair of four-pole magnet rings rotatably mounted on said neck for causing mutually opposing shifts of said outer beam paths in said region without substantially disturbing said central beam path; and a pair of six-pole magnet rings rotatably mounted on said neck, in axially spaced relation to said first named pair, for causing like direction shifts of said outer beam paths in said region without substantially disturbing said central beam path.
Claim 10
Dependent Claim
150 words
The combination comprising: a tri-beam color kinescope having a cylindrical neck enclosing a trio of in-line beam paths, a central one of said in-line beam paths substantially coinciding with the longitudinal axis of said neck with the remaining outer ones of said in-line beam paths being substantially symmetrically disposed on opposite sides of said axis, and with all of said in-line beam paths traversing a region of the interior of said neck which is free of magnetizable structures; a pair of four-pole magnet rings rotatably mounted on said neck for causing mutually opposing shifts of said outer beam paths in said region without substantially disturbing said central beam path; and a pair of six-pole magnet rings rotatably mounted on said neck, in axially spaced relation to said first named pair, for causing like direction shifts of said outer beam paths in said region without substantially disturbing said central beam path.
Claim 11
Dependent Claim
88 words
A beam adjusting device for use with an in-line, tri-beam, shadow-mask color kinescope comprising: a cylindrical support; a pair of two pole magnet rings, each magnetized across a ring diameter; a pair of four-pole magnet rings, each having poles, alternating in polarity, at 90* intervals about the ring periphery; and a pair of six-pole magnet rings, each having poles, alternating in polarity, at 60* intervals about the ring periphery; said ring pairs being mounted for rotation concentrically about said support at respective longitudinally spaced locations on said support.
Claim 12
Dependent Claim
88 words
A beam adjusting device for use with an in-line, tri-beam, shadow-mask color kinescope comprising: a cylindrical support; a pair of two pole magnet rings, each magnetized across a ring diameter; a pair of four-pole magnet rings, each having poles, alternating in polarity, at 90* intervals about the ring periphery; and a pair of six-pole magnet rings, each having poles, alternating in polarity, at 60* intervals about the ring periphery; said ring pairs being mounted for rotation concentrically about said support at respective longitudinally spaced locations on said support.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |