US4405949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid cooling in projection cathode ray tubes
Assignee: Zenith Electronics LLC
•
Filing: 1982-03-22
•
Granted: 1983-09-20
•
Expires: 2002-03-22
Abstract
Abstract Cooling means are disclosed for cooling the face panel of a projection cathode ray tube. The cooling means comprises a housing having a rearwardly extending flange with a forwardly tapering section configured to nest with the forwardly tapering section of the face panel when mated therewith. The housing has a window section for framing and passing the image formed on a cathodoluminescent screen on the inner surface of the face panel. Spacing means are provided for spacing the window section of the housing from the face panel window section, and bonding means provide for bonding and hermetically sealing the tapering sections together. A cooling medium is located in the space between the windows for cooling the face panel. The tapering sections provide for mechanically attaching the housing and the tube into firm exact adjacency for sealing, in conjunction with the bonding means, the housing to the face panel, and for physically supporting the tube in conjunction with mounting ears in the corner regions of the housing.
Inventors
- 👤 Richard L. Hockenbrock
- 👤 Paul Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7408; H01; H01J; H01J29/00; H01J29/006; H01J29/86; H01J29/861
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
Cooling means for cooling the face panel of a projection cathode ray tube, said face panel including a window section and a rearwardly extending flange having a forwardly tapering section, and a cathodoluminescent screen on the inner surface thereof for forming a television image, said cooling means comprising: a housing having a rearwardly extending flange with a forwardly tapering section configured to nest with the forwardly tapering section of the face panel when mated therewith, said housing having a window section for framing and passing said image, and including tube mounting ears in the corner regions thereof for supporting said cathode ray tube; spacing means for spacing said window section of said housing from said face panel window section bonding means for bonding and sealing said tapering sections together; a cooling medium located in the space between said windows for cooling the entirety said face panel; such that said tapering sections provide for mechanically attaching said housing and said tube into firm exact adjacency for sealing, in conjunction with said bonding means, said housing to said face panel, and for physically supporting said tube in conjunction with said mounting ears.
Claim 2
Dependent Claim
190 words
Cooling means for cooling the face panel of a projection cathode ray tube, said face panel including a window section and a rearwardly extending flange having a forwardly tapering section, and a cathodoluminescent screen on the inner surface thereof for forming a television image, said cooling means comprising: a housing having a rearwardly extending flange with a forwardly tapering section configured to nest with the forwardly tapering section of the face panel when mated therewith, said housing having a window section for framing and passing said image, and including tube mounting ears in the corner regions thereof for supporting said cathode ray tube; spacing means for spacing said window section of said housing from said face panel window section bonding means for bonding and sealing said tapering sections together; a cooling medium located in the space between said windows for cooling the entirety said face panel; such that said tapering sections provide for mechanically attaching said housing and said tube into firm exact adjacency for sealing, in conjunction with said bonding means, said housing to said face panel, and for physically supporting said tube in conjunction with said mounting ears.
Claim 3
Dependent Claim
12 words
Cooling means according to claim 1 wherein said face panel is round.
Claim 4
Dependent Claim
12 words
Cooling means according to claim 1 wherein said face panel is rectangular.
Claim 5
Dependent Claim
227 words
Cooling means for cooling the face panel of a rectangular projection cathode ray tube, said tube having a funnel joined to said face panel at a seal line, said face panel including a window section and a rearwardly extending flange having a forwardly tapering section, and a cathodoluminescent screen on the inner surface thereof for forming a television image, said cooling means comprising: a stainless steel, sheet-metal housing having a rearwardly extending flange for covering said seal line, and a forwardly tapering section configured to nest with the forwardly tapering section of the face panel when mated therewith, said housing having a window section recessed in said housing for passing said image, and including mounting ears in the corner regions for supporting said cathode ray tube; spacing means for spacing said window section of said housing from said face panel window section; bonding means for bonding sealing said tapering sections together; a cooling medium located in the space between said windows for cooling the entirety of said face panel; such that said tapering sections provide for mechanically attaching said housing and said tube into firm exact adjacency for sealing, in conjunction with said bonding means, said housing to said face panel; and for physically supporting said tube in conjunction with said mounting ears; and said rearwardly extending flange provides for shielding against X-radiation from said seal line.
Claim 6
Dependent Claim
227 words
Cooling means for cooling the face panel of a rectangular projection cathode ray tube, said tube having a funnel joined to said face panel at a seal line, said face panel including a window section and a rearwardly extending flange having a forwardly tapering section, and a cathodoluminescent screen on the inner surface thereof for forming a television image, said cooling means comprising: a stainless steel, sheet-metal housing having a rearwardly extending flange for covering said seal line, and a forwardly tapering section configured to nest with the forwardly tapering section of the face panel when mated therewith, said housing having a window section recessed in said housing for passing said image, and including mounting ears in the corner regions for supporting said cathode ray tube; spacing means for spacing said window section of said housing from said face panel window section; bonding means for bonding sealing said tapering sections together; a cooling medium located in the space between said windows for cooling the entirety of said face panel; such that said tapering sections provide for mechanically attaching said housing and said tube into firm exact adjacency for sealing, in conjunction with said bonding means, said housing to said face panel; and for physically supporting said tube in conjunction with said mounting ears; and said rearwardly extending flange provides for shielding against X-radiation from said seal line.
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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |