US3844006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making and adjusting deflection yoke
Assignee: Pemcor Inc
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Filing: 1974-02-28
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Granted: 1974-10-29
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Expires: 1994-02-28
Abstract
Abstract The core and deflection coils of a deflection yoke assembly for a color television cathode tube are initially assembled and mounted to provide for the relative fine adjustment of the core and deflection coils along at least the vertical axis and most desirably also along the horizontal axis. Separate screw adjusting means or the like, either permanently or temporarily affixed to the deflection yoke assembly, relatively adjusts the relative positions of the deflection coils and the core. The adjustment along the vertical axis is used to vary the red-green trace crossover of a cross-hatch video pattern at the 3 and 9 o''clock positions of the cathode ray tube face to zero or a finite value. The adjustment along the horizontal axis is used to equalize or reduce to zero the red trace height of a cross-hatch video pattern at the 12 and 6 o''clock positions of the cathode ray tube face.
Inventors
- 👤 K Mcglashan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:35
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/82; H01J29/823; H01J29/826; H01J29/70; H01J29/701; H01J29/702; H01J29/705; H01J2229/00; H01J2229/56; H01J2229/563; H01J2229/5637
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
277 words
A method of manufacturing a deflection yoke assembly with optimized beam deflecting parameteRs permitting the beams of a color television cathode ray tube to be properly dynamically converged over the face of the cathode ray tube, said method comprising: fabricating the deflection yoke assembly so it includes a frame mountable around the neck of a color television cathode ray tube, the frame supporting vertical and horizontal deflection coils and a core related to said vertical and horizontal deflection coils to form a low reluctance path for the magnetic field outside the neck of the cathode ray tube, one of said core and deflection coils being mounted for fine adjustment with respect to the other of same parallel to at least one of the horizontal and vertical axes of the deflection yoke assembly, mounting the deflection yoke assembly on the neck of a standard test color television cathode ray tube including beam intensity control terminals for controlling the intensity of the electron beams thereof striking the cathode ray tube screen, mounting purity and static convergence apparatus mounted around the neck of said cathode ray tube, making the usual purity and static convergence adjustments with said apparatus and, while applying signals to said cathode ray tube control terminals and to one of said horizontal and vertical deflection coils of said deflection yoke assembly to produce colored horizontal beam traces to be converged at least at two points spaced on opposite sides of the center point of the screen, adjusting the relative position between the core and at least one of said horizontal and vertical deflection coils to produce the desired convergence of said horizontal beam traces at said points.
Claim 2
Independent Claim
277 words
A method of manufacturing a deflection yoke assembly with optimized beam deflecting parameteRs permitting the beams of a color television cathode ray tube to be properly dynamically converged over the face of the cathode ray tube, said method comprising: fabricating the deflection yoke assembly so it includes a frame mountable around the neck of a color television cathode ray tube, the frame supporting vertical and horizontal deflection coils and a core related to said vertical and horizontal deflection coils to form a low reluctance path for the magnetic field outside the neck of the cathode ray tube, one of said core and deflection coils being mounted for fine adjustment with respect to the other of same parallel to at least one of the horizontal and vertical axes of the deflection yoke assembly, mounting the deflection yoke assembly on the neck of a standard test color television cathode ray tube including beam intensity control terminals for controlling the intensity of the electron beams thereof striking the cathode ray tube screen, mounting purity and static convergence apparatus mounted around the neck of said cathode ray tube, making the usual purity and static convergence adjustments with said apparatus and, while applying signals to said cathode ray tube control terminals and to one of said horizontal and vertical deflection coils of said deflection yoke assembly to produce colored horizontal beam traces to be converged at least at two points spaced on opposite sides of the center point of the screen, adjusting the relative position between the core and at least one of said horizontal and vertical deflection coils to produce the desired convergence of said horizontal beam traces at said points.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the horizontal and vertical deflection coils are immovably mounted relative to said frame, and said adjusting operation is performed by moving the core.
Claim 4
Dependent Claim
37 words
The method of claim 1 wherein said deflection yoke assembly frame is held in a fixed position and said core is clamped to a finely adjustable support structure which supports the core for movement along said axis.
Claim 5
Dependent Claim
60 words
The method of claim 3 wherein said adjustable structure includes means for holding said deflection yoke assembly frame in a fixed position, said frame and holding means forms a re-usable assembly which is only temporarily attached to the deflection yoke assembly, the core being adhesively secured in place on the deflection yoke assembly frame after said adjustment thereof is made.
Claim 6
Independent Claim
279 words
A method of manufacturing a deflection yoke assembly with optimized beam deflecting parameters permitting the beams of a color television cathode ray tube to be properly dynamically converged over the face of the cathode ray tube, said method comprising: fabricating the deflection yoke assembly so it includes a frame mountable around the neck of a color television cathode ray tube, the frame supporting vertical and horizontal deflection coils and a core related to said vertical and horizontal deflection coils to form a low reluctance path for the magnetic fields outside the neck of the cathode ray tube, one of said core and horizontal deflection coils being mounted for fine adjustment with respect to the other of same parallel to the vertical axis of the deflection yoke assembly, mounting the deflection yoke assembly on the neck of the standard test color television cathode ray tube including beam intensity control terminals for controlling the intensity of the electron beams thereof striking the cathode ray tube screen, mounting purity and static convergence apparatus around the neck of said cathode ray tube, making the usual purity and static convergence adjustments with said apparatus and, while applying signals to said cathode ray tube control terminals and at least to said horizontal deflection coils of said deflection yoke assembly to produce at least across the horizontal center band of the screen of the cathode ray tube colored horizontal beam traces, adjusting the relative vertical position between said core and horizontal deflection coils to produce a desired degree of coNvergence between at least two of the horizontal traces along said center band of said cathode ray tube screen at the 3 and 9 o''clock positions thereof.
Claim 7
Independent Claim
279 words
A method of manufacturing a deflection yoke assembly with optimized beam deflecting parameters permitting the beams of a color television cathode ray tube to be properly dynamically converged over the face of the cathode ray tube, said method comprising: fabricating the deflection yoke assembly so it includes a frame mountable around the neck of a color television cathode ray tube, the frame supporting vertical and horizontal deflection coils and a core related to said vertical and horizontal deflection coils to form a low reluctance path for the magnetic fields outside the neck of the cathode ray tube, one of said core and horizontal deflection coils being mounted for fine adjustment with respect to the other of same parallel to the vertical axis of the deflection yoke assembly, mounting the deflection yoke assembly on the neck of the standard test color television cathode ray tube including beam intensity control terminals for controlling the intensity of the electron beams thereof striking the cathode ray tube screen, mounting purity and static convergence apparatus around the neck of said cathode ray tube, making the usual purity and static convergence adjustments with said apparatus and, while applying signals to said cathode ray tube control terminals and at least to said horizontal deflection coils of said deflection yoke assembly to produce at least across the horizontal center band of the screen of the cathode ray tube colored horizontal beam traces, adjusting the relative vertical position between said core and horizontal deflection coils to produce a desired degree of coNvergence between at least two of the horizontal traces along said center band of said cathode ray tube screen at the 3 and 9 o''clock positions thereof.
Claim 8
Dependent Claim
39 words
The method of claim 5 wherein said adjusting operation is made to produce a zero or near zero convergence between the horizontal red and green traces at the 3 and 9 o''clock positions of the cathode ray tube screen.
Claim 9
Dependent Claim
29 words
The method of claim 5 wherein the horizontal and vertical deflection coils are immovably mounted relative to said frame, and said adjusting operation is performed by moving the core.
Claim 10
Dependent Claim
36 words
The method of claim 5 wherein said deflection yoke assembly frame is held in fixed position and said core is clamped to a finely adjustable support structure which supports the core for movement along said axis.
Claim 11
Dependent Claim
60 words
The method of claim 8 wherein said adjustable structure includes means for holding said deflection yoke assembly frame in a fixed position, said frame and holding means forms a re-usable assembly which is only temporarily attached to the deflection yoke assembly, the core being adhesively secured in place on the deflection yoke assembly frame after said adjustment thereof is made.
Claim 12
Independent Claim
275 words
A method of manufacturing a deflection yoke assembly with optimized beam deflecting parameters permitting the beams of a color television cathode ray tube to be properly dynamically converged over the face of the cathode ray tube, said method comprising: fabricating the deflection yoke assembly so it includes a frame mountable around the neck of a color television cathode ray tube, the frame supporting vertical and horizontal deflection coils and a core related to said vertical and horizontal deflection coils to form a low reluctance path for the magnetic fields outside the neck of the cathode ray tube, one of said core and vertical deflection coils being mounted for fine adjustment with respect to the other of same parallel to the horizontal axis of the deflection yoke assembly, mounting the deflection yoke assembly on the neck of a standard test color television cathode ray tube including beam intensity control terminals for controlling the intensity of the electron beams thereof striking the cathode ray tube screen, mounting purity and static convergence apparatus around the neck of said cathode ray tube, making the usual purity and static convergence adjustments with said apparatus and, while applying signals to said cathode ray tube control terminals and to said horizontal and vertical deflection coils of said deflection yoke assembly to produce at least across the uppermost and lowermost portions of said screen of the cathode ray tube colored horizontal beam traces, adjusting the relative horizontal position between said core and vertical deflection coils to produce a desired degree of convergence between at least two of the horizontal traces at the 12 and 6 o''clock positions of the cathode ray tube screen.
Claim 13
Independent Claim
275 words
A method of manufacturing a deflection yoke assembly with optimized beam deflecting parameters permitting the beams of a color television cathode ray tube to be properly dynamically converged over the face of the cathode ray tube, said method comprising: fabricating the deflection yoke assembly so it includes a frame mountable around the neck of a color television cathode ray tube, the frame supporting vertical and horizontal deflection coils and a core related to said vertical and horizontal deflection coils to form a low reluctance path for the magnetic fields outside the neck of the cathode ray tube, one of said core and vertical deflection coils being mounted for fine adjustment with respect to the other of same parallel to the horizontal axis of the deflection yoke assembly, mounting the deflection yoke assembly on the neck of a standard test color television cathode ray tube including beam intensity control terminals for controlling the intensity of the electron beams thereof striking the cathode ray tube screen, mounting purity and static convergence apparatus around the neck of said cathode ray tube, making the usual purity and static convergence adjustments with said apparatus and, while applying signals to said cathode ray tube control terminals and to said horizontal and vertical deflection coils of said deflection yoke assembly to produce at least across the uppermost and lowermost portions of said screen of the cathode ray tube colored horizontal beam traces, adjusting the relative horizontal position between said core and vertical deflection coils to produce a desired degree of convergence between at least two of the horizontal traces at the 12 and 6 o''clock positions of the cathode ray tube screen.
Claim 14
Dependent Claim
37 words
The method of claim 5 wherein said adjusting operation is made to produce a substantially equal spacing between the horizontal red and green traces at the 3 and 9 o''clock positions of the cathode ray tube screen.
Claim 15
Dependent Claim
95 words
The method of claim 11 wherein said signals produce also across the horizontal center band of the cathode ray tube screen colored horizontal traces, the adjustable one of said core and deflection coils is mounted for independent adjustment respectively along the horizontal and vertical axes of the deflection yoke assembly, and the adjustable one of said core and horizontal deflection coils is also adjusted along said vertical axis to produce zero or near zero convergence between the horizontal red and green traces at the 3 and 9 o''clock positions of the cathode ray tube screen.
Claim 16
Dependent Claim
29 words
The method of claim 10 wherein the horizontal and vertical deflection coils are immovably mounted relative to said frame, the said adjusting operation is performed by moving the core.
Claim 17
Dependent Claim
37 words
The method of claim 13 wherein said defleCtion yoke assembly frame is held in a fixed position and said core is clamped to a finely adjustable support structure which supports the core for movement along said axis.
Claim 18
Dependent Claim
60 words
The method of claim 14 wherein said adjustable structure includes means for holding said deflection yoke assembly frame in a fixed position, said frame and holding means forms a re-usable assembly which is only temporarily attached to the deflection yoke assembly, the core being adhesively secured in place on the deflection yoke assembly frame after said adjustment thereof is made.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |