US3102923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variation of cathode emission area with shift from monochrome to color
Assignee: Lanteris Space LLC
•
Filing: 1960-07-18
•
Granted: 1963-09-03
•
Expires: 1980-07-18
Abstract
No abstract record available.
Inventors
- 👤 Richard G Clapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:27
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A COLOR TELEVISION RECEIVER CAPABLE OF RECEIVING BOTH COLOR AND MONOCHROME SIGNALS, A CATHODE RAY TUBE HAVING A SCREEN COMPRISING ELEMENTS ARRANGED FOR SUCCESSIVE IMPINGEMENT BY AN ELECTRON BEAM AND AN ELECTRON GUN FOR PRODUCING SAID BEAM, SAID GUN COMPRISING A CATHODE, A CONTROL GRID, A SCREEN GRID AND AN ANODE, MEANS FOR APPLYING TO SAID SCREEN GRID A RELATIVELY HIGH POSITIVE UNIDIRECTIONAL VOLTAGE OF PREDETERMINED CONSTANT AMPLITUDE SUCH THAT ELECTRON BEAM CURRENT IS DRAWN FROM A VERY SMALL AREA OF SAID CATHODE TO ESTABLISH A VERY NARROW BEAM WIDTH, AND MEANS FOR APPLYING A SUBSTANTIALLY LOWER POSITIVE UNIDIRECTIONAL VOLTAGE OF PREDETERMINED CONSTANT AMPLITUDE TO SAID SCREEN GRID WHENEVER A MONOCHROME SIGNAL IS RECEIVED, THEREBY TO CAUSE THE ELECTRON BEAM CURRENT TO BE DRAWN FROM A LARGER AREA OF SAID CATHODE DURING MONOCHROME RECEPTION.
Claim 2
Dependent Claim
135 words
IN A COLOR TELEVISION RECEIVER CAPABLE OF RECEIVING BOTH COLOR AND MONOCHROME SIGNALS, A CATHODE RAY TUBE HAVING A SCREEN COMPRISING ELEMENTS ARRANGED FOR SUCCESSIVE IMPINGEMENT BY AN ELECTRON BEAM AND AN ELECTRON GUN FOR PRODUCING SAID BEAM, SAID GUN COMPRISING A CATHODE, A CONTROL GRID, A SCREEN GRID AND AN ANODE, MEANS FOR APPLYING TO SAID SCREEN GRID A RELATIVELY HIGH POSITIVE UNIDIRECTIONAL VOLTAGE OF PREDETERMINED CONSTANT AMPLITUDE SUCH THAT ELECTRON BEAM CURRENT IS DRAWN FROM A VERY SMALL AREA OF SAID CATHODE TO ESTABLISH A VERY NARROW BEAM WIDTH, AND MEANS FOR APPLYING A SUBSTANTIALLY LOWER POSITIVE UNIDIRECTIONAL VOLTAGE OF PREDETERMINED CONSTANT AMPLITUDE TO SAID SCREEN GRID WHENEVER A MONOCHROME SIGNAL IS RECEIVED, THEREBY TO CAUSE THE ELECTRON BEAM CURRENT TO BE DRAWN FROM A LARGER AREA OF SAID CATHODE DURING MONOCHROME RECEPTION.
References Cited (Backward Citations)
US2713606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |