US3887827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Target assembly of image pick-up tube
Assignee: Panasonic Holdings Corp
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Filing: 1973-10-23
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Granted: 1975-06-03
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Expires: 1993-10-23
Abstract
Abstract A target assembly of an image pick-up tube is provided which includes a stepped annular support member for a target substrate secured between a face plate and a front end portion of a tubular envelope of the image pick-up tube. The target substrate is affixed within the outwardly offset portion of the support member. The support member enables a fabrication sequence to be used which obviates exposure of the target substrate to mechanical or thermal shock during manufacture, permits the affixing material to be out of the field of view in a straightsides image pick-up tube, and furnishes automatically accurate centering of the target substrate. In combination with a softmetal sealing ring having an annular width extending from the inwardly offset portion of the support member to the inner side of a signal ring capping the face plate and the envelope, the support member also insulates the target substrate from mechanical shock during use of the image pick-up tube.
Inventors
- 👤 Mitsumasa Katayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:50
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
231 words
A target assembly of an image pick-up tube including a tubular envelope, comprising: a transparent face plate having the diameter of said tubular envelope; an annular, stepped metallic support member comprising an inwardly offset portion adjacent said face plate, an outwardly offset portion, and a step portion therebetween, said offset portions being parallel to said tubular envelope and said step portion being perpendicular thereto; an annular, electrically conductive signal ring of cylindrical shape which is disposed along the rim of said face plate; an annular binding and sealing ring of soft metal which is sealingly and bindingly interposed between and welded to said face plate and said tubular envelope, has an outer diameter which is greater than the outer diameter of said tubular envelope, and has an inner diameter which is less than the inner diameter of said tubular Envelope minus the radially measured width of said step portion, said binding and sealing ring being additionally welded to said inwardly offset portion along said inner diameter, whereby said binding and sealing ring has sufficient annular width to extend from said inwardly offset portion to said signal ring, said signal ring is annularly spaced from the exterior of said tubular envelope, and said outwardly offset portion is annularly spaced from the interior of said tubular envelope so that damage from mechanical shock while said image pick-up tube is in use is minimized.
Claim 2
Dependent Claim
231 words
A target assembly of an image pick-up tube including a tubular envelope, comprising: a transparent face plate having the diameter of said tubular envelope; an annular, stepped metallic support member comprising an inwardly offset portion adjacent said face plate, an outwardly offset portion, and a step portion therebetween, said offset portions being parallel to said tubular envelope and said step portion being perpendicular thereto; an annular, electrically conductive signal ring of cylindrical shape which is disposed along the rim of said face plate; an annular binding and sealing ring of soft metal which is sealingly and bindingly interposed between and welded to said face plate and said tubular envelope, has an outer diameter which is greater than the outer diameter of said tubular envelope, and has an inner diameter which is less than the inner diameter of said tubular Envelope minus the radially measured width of said step portion, said binding and sealing ring being additionally welded to said inwardly offset portion along said inner diameter, whereby said binding and sealing ring has sufficient annular width to extend from said inwardly offset portion to said signal ring, said signal ring is annularly spaced from the exterior of said tubular envelope, and said outwardly offset portion is annularly spaced from the interior of said tubular envelope so that damage from mechanical shock while said image pick-up tube is in use is minimized.
Claim 3
Dependent Claim
231 words
A target assembly of an image pick-up tube including a tubular envelope, comprising: a transparent face plate having the diameter of said tubular envelope; an annular, stepped metallic support member comprising an inwardly offset portion adjacent said face plate, an outwardly offset portion, and a step portion therebetween, said offset portions being parallel to said tubular envelope and said step portion being perpendicular thereto; an annular, electrically conductive signal ring of cylindrical shape which is disposed along the rim of said face plate; an annular binding and sealing ring of soft metal which is sealingly and bindingly interposed between and welded to said face plate and said tubular envelope, has an outer diameter which is greater than the outer diameter of said tubular envelope, and has an inner diameter which is less than the inner diameter of said tubular Envelope minus the radially measured width of said step portion, said binding and sealing ring being additionally welded to said inwardly offset portion along said inner diameter, whereby said binding and sealing ring has sufficient annular width to extend from said inwardly offset portion to said signal ring, said signal ring is annularly spaced from the exterior of said tubular envelope, and said outwardly offset portion is annularly spaced from the interior of said tubular envelope so that damage from mechanical shock while said image pick-up tube is in use is minimized.
Claim 4
Dependent Claim
231 words
A target assembly of an image pick-up tube including a tubular envelope, comprising: a transparent face plate having the diameter of said tubular envelope; an annular, stepped metallic support member comprising an inwardly offset portion adjacent said face plate, an outwardly offset portion, and a step portion therebetween, said offset portions being parallel to said tubular envelope and said step portion being perpendicular thereto; an annular, electrically conductive signal ring of cylindrical shape which is disposed along the rim of said face plate; an annular binding and sealing ring of soft metal which is sealingly and bindingly interposed between and welded to said face plate and said tubular envelope, has an outer diameter which is greater than the outer diameter of said tubular envelope, and has an inner diameter which is less than the inner diameter of said tubular Envelope minus the radially measured width of said step portion, said binding and sealing ring being additionally welded to said inwardly offset portion along said inner diameter, whereby said binding and sealing ring has sufficient annular width to extend from said inwardly offset portion to said signal ring, said signal ring is annularly spaced from the exterior of said tubular envelope, and said outwardly offset portion is annularly spaced from the interior of said tubular envelope so that damage from mechanical shock while said image pick-up tube is in use is minimized.
Claim 5
Dependent Claim
50 words
The target assembly of claim 1 wherein said binding and sealing ring exerts a strong inward pressure upon said inwardly offset portion when sealing pressure is applied to compress the soft metal thereof while said binding and sealing ring is being welded, thereby providing a strong structure against external shock.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |