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US3585431A
Expired / Lapsed
US
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Shadow-mask cathode-ray tube including a masking member comprising a skirt having indentations and projections overlapping and attached to a frame
Assignee: RCA Licensing Corp
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Filing: 1970-06-15
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Granted: 1971-06-15
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Expires: 1990-06-15
Abstract
Abstract A cathode-ray tube including an envelope comprising an outwardly domed generally rectangularly shaped faceplate, a phosphor screen disposed on the internal surface of said faceplate, means for projecting electrons towards the screen, and a generally rectangularly shaped shadow-mask assembly mounted adjacent to the screen in the path of the electrons. The mask assembly comprises a rigid metal frame and a metal masking member welded to the frame. The masking member includes a domed shadow mask integral with a peripheral skirt having a plurality of alternate projections and indentations, which may extend the length of the skirt substantially parallel to the longitudinal axis of the tube.
Inventors
- 👤 Kenneth Adelpert Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:44
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/06; H01J29/07; H01J29/073; H01J2229/00; H01J2229/07; H01J2229/0722; H01J2229/0727; H01J2229/0766; H01J2229/0772
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A shadow-mask cathode-ray tube including: a. an envelope comprising an outwardly domed generally rectangular faceplate, b. a mosaic phosphor screen disposed on the internal surface of said faceplate, c. electron-gun means for projecting electrons towards said screen, and d. a generally rectangular shadow-mask assembly mounted adjacent to said screen in the paths of said electrons, said assembly comprising a rigid metal frame and a thin sheet metal masking member welded at a limited number of points to said frame, said masking member including i. a multiapertured, domed mask integral with ii. a peripheral skirt substantially normal to the plane of said mask, the improvement comprising: said peripheral skirt having a plurality of alternate projections and indentations therein forming means for attaching said skirt to said frame.
Claim 2
Dependent Claim
126 words
A shadow-mask cathode-ray tube including: a. an envelope comprising an outwardly domed generally rectangular faceplate, b. a mosaic phosphor screen disposed on the internal surface of said faceplate, c. electron-gun means for projecting electrons towards said screen, and d. a generally rectangular shadow-mask assembly mounted adjacent to said screen in the paths of said electrons, said assembly comprising a rigid metal frame and a thin sheet metal masking member welded at a limited number of points to said frame, said masking member including i. a multiapertured, domed mask integral with ii. a peripheral skirt substantially normal to the plane of said mask, the improvement comprising: said peripheral skirt having a plurality of alternate projections and indentations therein forming means for attaching said skirt to said frame.
Claim 3
Dependent Claim
31 words
The tube of claim 1 wherein the faces of said indentations are substantially parallel to said frame, said indentations forming a surface for overlapping attachment to a surface of said frame.
Claim 4
Dependent Claim
25 words
The tube of claim 2 wherein said indentations are substantially parallel to the longitudinal axis of said tube and extend the length of said skirt.
Claim 5
Dependent Claim
18 words
The tube of claim 2 wherein said projections are substantially parallel to the longitudinal axis of said tube.
Claim 6
Dependent Claim
31 words
The tube of claim 4 wherein said projections and indentations are in the range of 0.250 to 0.625 inch wide and in the range of 0.030 to 0.050 inch in depth.
Claim 7
Dependent Claim
16 words
The tube of claim 1 wherein said projections extend less than the length of said skirt.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |