Patent US3832592A successfully refreshed from Google Patents.
US3832592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mask electrode support for color picture tube
Assignee: Hitachi Ltd
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Filing: 1972-06-30
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Granted: 1974-08-27
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Expires: 1992-06-30
Abstract
Abstract A color picture tube in which a color selective mask is supported by mask support means made of a plurality of elastic material sheets each shaped and arranged so as to have a relatively large elasticity in a direction being in a plane parallel to a side face of a mask frame to which the sheet is secured and perpendicular to the length of the side face, thus serving as a torsion spring, so that the path of local displacement of the color selective mask and its peripheral frame due to thermal expansion or their displacement due to any external force is substantially coincident with the path of a deflected electron beam, thereby compensating for the deviations of relative positions between phosphor dots and corresponding apertures in the mask.
Inventors
- 👤 E Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:48
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/06; H01J29/07; H01J29/073
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
259 words
In a color picture tube including electron gun means, an envelope having a neck portion accommodating said electron gun means, a funnel portion and a panel portion provided with a phosphor screen on the inner surface thereof, a color selective mask mounted on an annular mask frame and mask support means for supporting said mask frame on said panel portion to position said color selective mask in place in front of said screen within said envelope, the improvement comprising a mask support means forming a torsion spring which includes a plurality of integral flexible sheet spring sections each consisting of opposite end sections bonded to different points spaced circumferentially along the surface of said mask frame, at least one intermediate leg section extending from said end sections away from said surface of said mask frame and away from said phosphor screen and an engaging section extending from said one intermediate leg section substantially parallel to said surface of said mask frame and provided with a hole, the axis of said hole in said engaging section being in a first plane transverse to the axis of said tube and intersecting said tube axis at a first point, and all corresponding bonding points of said opposite end sections at which they are bonded to said surface of said mask frame being in second planes substantially parallel to said first plane and intersecting said tube axis at second points, said first point being further from said phosphor screen than said second points, whereby each said integral sheet serves as a torsion spring.
Claim 2
Dependent Claim
259 words
In a color picture tube including electron gun means, an envelope having a neck portion accommodating said electron gun means, a funnel portion and a panel portion provided with a phosphor screen on the inner surface thereof, a color selective mask mounted on an annular mask frame and mask support means for supporting said mask frame on said panel portion to position said color selective mask in place in front of said screen within said envelope, the improvement comprising a mask support means forming a torsion spring which includes a plurality of integral flexible sheet spring sections each consisting of opposite end sections bonded to different points spaced circumferentially along the surface of said mask frame, at least one intermediate leg section extending from said end sections away from said surface of said mask frame and away from said phosphor screen and an engaging section extending from said one intermediate leg section substantially parallel to said surface of said mask frame and provided with a hole, the axis of said hole in said engaging section being in a first plane transverse to the axis of said tube and intersecting said tube axis at a first point, and all corresponding bonding points of said opposite end sections at which they are bonded to said surface of said mask frame being in second planes substantially parallel to said first plane and intersecting said tube axis at second points, said first point being further from said phosphor screen than said second points, whereby each said integral sheet serves as a torsion spring.
Claim 3
Dependent Claim
35 words
The color picture tube according to claim 1 in which said each integral elastic sheet has two intermediate leg sections of a parallelogrammic form and said engaging section bridges said two parallelogrammic intermediate leg sections.
Claim 4
Dependent Claim
61 words
The color picture tube according to claim 1 in which each integral elastic sheet has two intermediate leg sections and said engaging section bridges said two intermediate sections, said engaging section having a protrusion extending in a direction away from said phosphor screen and parallel to the axis of the color picture tube and said hole being formed in said protrusion.
Claim 5
Dependent Claim
38 words
The color picture tube according to claim 1 in which said each integral elastic sheet has one intermediate leg section and said end sections being united with a central section, said leg section extending from said central section.
Claim 6
Dependent Claim
55 words
The color picture tube according to claim 1 in which said each integral elastic sheet has a U-shaped section having a pair of leg members serving as said end sections to be bonded and a central section joining said leg members, the U-shaped sheet being bonded to the mask frame only at said leg members.
Claim 7
Dependent Claim
219 words
In a color picture tube including electron gun means, an envelope having a neck portion accommodating said electron gun means, a funnel portion and a panel portion provided with a phosphor screen on the inner surface thereof, a color selective mask mounted on an annular mask frame, and mask support means for supporting said mask frame on said panel portion coaxially with said electron gun means to position said color selective mask in place in front of said screen within said envelope, the improvement comprising a mask support means which includes a plurality of flexible strips spaced about the periphery of said mask frame with an orientation transverse to the axis thereof, each strip being a one-piece member consisting of opposite end sections bonded to the surface of said mask frame, A pair of intermediate leg sections of non-rectangular parallelogrammic shape extending from respective ones of said end sections in directions away from said surface of said mask frame and away from said phosphor screen and an engaging section bridging said intermediate leg sections in a plane substantially parallel to said surface of said mask frame, said engaging section being provided with a hole for engagement by said panel portion, which hole is positioned further from said screen than the bonded portions of the end sections of the strip.
Claim 8
Dependent Claim
219 words
In a color picture tube including electron gun means, an envelope having a neck portion accommodating said electron gun means, a funnel portion and a panel portion provided with a phosphor screen on the inner surface thereof, a color selective mask mounted on an annular mask frame, and mask support means for supporting said mask frame on said panel portion coaxially with said electron gun means to position said color selective mask in place in front of said screen within said envelope, the improvement comprising a mask support means which includes a plurality of flexible strips spaced about the periphery of said mask frame with an orientation transverse to the axis thereof, each strip being a one-piece member consisting of opposite end sections bonded to the surface of said mask frame, A pair of intermediate leg sections of non-rectangular parallelogrammic shape extending from respective ones of said end sections in directions away from said surface of said mask frame and away from said phosphor screen and an engaging section bridging said intermediate leg sections in a plane substantially parallel to said surface of said mask frame, said engaging section being provided with a hole for engagement by said panel portion, which hole is positioned further from said screen than the bonded portions of the end sections of the strip.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |