US4620933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflecting yoke for electromagnetic deflection type cathode-ray tubes and method for manufacturing it
Assignee: Toshiba Corp
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Filing: 1985-08-08
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Granted: 1986-11-04
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Expires: 2005-08-08
Abstract
Abstract Disclosed are deflecting yoke for electromagnetic deflection type cathode-ray tubes which comprises a compressively molded products consisting substantially of an iron powder or an iron-based alloy magnetic powder; an electrically insulating powdery resin; an organic metallic coupling agent; and an electrically insulating powdery inorganic compound; and a method for manufacturing it which comprises the steps of: mixing an iron powder or an iron-based alloy magnetic powder, an electrically insulating powdery resin and an organometallic coupling agent with one other; then mixing an electrically insulating powdery inorganic compound therewith; and compressively molding the prepared mixture. The deflecting yoke of the present invention has more excellent properties, as compared with conventional ferrite cores and dust cores. Moreover, the deflecting yoke of the present invention can restrain the temperature rise more satisfactorily than the conventional deflecting yoke. Further, the deflecting yoke of the present invention can be manufactured with extreme ease and is suitable for mass production.
Inventors
- 👤 Kumi Ochiai
- 👤 Hiromichi Horie
- 👤 Itsuo Arima
- 👤 Mikio Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:51
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24; H01F1/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
44 words
A deflecting yoke for an electromagnetic deflection type cathode-ray tube which comprises a compressively molded products consisting essentially of an iron powder or an iron-based alloy magnetic powder; an electrically insulating powdery resin; an organometallic coupling agent; and an electrically insulating powdery inorganic compound.
Claim 2
Dependent Claim
44 words
A deflecting yoke for an electromagnetic deflection type cathode-ray tube which comprises a compressively molded products consisting essentially of an iron powder or an iron-based alloy magnetic powder; an electrically insulating powdery resin; an organometallic coupling agent; and an electrically insulating powdery inorganic compound.
Claim 3
Dependent Claim
44 words
A deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 1, wherein a blending proportion of said iron or iron-based alloy magnetic powder is between 65% or more and less than 98.5% based on the whole volume of said deflecting yoke.
Claim 4
Dependent Claim
40 words
A deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 1, wherein said organometallic coupling agent is an organometallic coupling agent in which a central atom is any one of titanium, silicon, aluminum, zirconium, indium and chromium.
Claim 5
Dependent Claim
40 words
A deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 3, wherein a blending proportion of said organometallic coupling agent is a volume ratio of 0.3% or more based on the whole volume of said deflecting yoke.
Claim 6
Dependent Claim
154 words
A deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 1, wherein said organometallic coupling agent is one selected from the group consisting of a titanate coupling agent represented by the general formula: R.sup.1.sub.m --Ti--X.sub.n wherein R 1 is a group which is easy to be hydrolyzed, Ti is titanium, X is a lipophilic group, m is an integer of 1 to 4, n is an integer of 1 to 5, and m+n is 4 or 6; a silane coupling agent represented by the general formula: ##STR2## wherein R 2 is a substituted or unsubstituted alkyl group, Si is silicon, Y is an organic functional group and p is an integer of 2 or 3; and an aluminum coupling agent represented by the general formula: (R.sup.2 O).sub.q --Al--X.sub.3-q wherein R 2 and X are the same as defined above, Al is aluminum and q is an integer of 1 or 2.
Claim 7
Dependent Claim
32 words
A deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 1, wherein a primary average particle diameter of said electrically insulating powdery inorganic compound is 0.5 μm or less.
Claim 8
Dependent Claim
42 words
A deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 6, wherein a blending proportion of said electrically insulating powdery inorganic compound is a volume ratio of 0.1% or more based on the whole volume of said deflecting yoke.
Claim 9
Independent Claim
57 words
A method for manufacturing a deflecting yoke for an electromagnetic deflection type cathode-ray tube which comprises the steps of: mixing an iron powder or an iron-based alloy magnetic powder, an electrically insulating powdery resin and an organometallic coupling agent with one other; then mixing an electrically insulating powdery inorganic compound therewith; and compressively molding the prepared mixture.
Claim 10
Independent Claim
57 words
A method for manufacturing a deflecting yoke for an electromagnetic deflection type cathode-ray tube which comprises the steps of: mixing an iron powder or an iron-based alloy magnetic powder, an electrically insulating powdery resin and an organometallic coupling agent with one other; then mixing an electrically insulating powdery inorganic compound therewith; and compressively molding the prepared mixture.
Claim 11
Dependent Claim
48 words
A method for preparing a deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 8, wherein a blending proportion of said iron or iron-based alloy magnetic powder is between 65% or more and less than 98.5% based on the whole volume of said deflecting yoke.
Claim 12
Dependent Claim
44 words
A method for preparing a deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 8, wherein said organometallic coupling agent is an organometallic coupling agent in which a central atom is any one of titanium, silicon, aluminum, zirconium, indium and chromium.
Claim 13
Dependent Claim
44 words
A method for preparing a deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 8, wherein a blending proportion of said organometallic coupling agent is a volume ratio of 0.3% or more based on the whole volume of said deflecting yoke.
Claim 14
Dependent Claim
44 words
A method for preparing a deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 8, wherein a blending proportion of said organometallic coupling agent is a volume ratio of 0.3% or more based on the whole volume of said deflecting yoke.
Claim 15
Dependent Claim
36 words
A method for preparing a deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 8, wherein a primary average particle diameter of said electrically insulating powdery inorganic compound is 0.5 μm or less.
Claim 16
Dependent Claim
46 words
A method for preparing a deflecting yoke for an electromagnetic deflection type cathode-ray tube according to claim 8, wherein a blending proportion of said electrically insulating powdery inorganic compound is a volume ratio of 0.1% or more based on the whole volume of said deflecting yoke.
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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) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |