GB455479A - Improvements in or relating to electrical circuits associated with cathode-ray tubes - Google Patents
Improvements in or relating to electrical circuits associated with cathode-ray tubesInfo
- Publication number
- GB455479A GB455479A GB10010/36A GB1001036A GB455479A GB 455479 A GB455479 A GB 455479A GB 10010/36 A GB10010/36 A GB 10010/36A GB 1001036 A GB1001036 A GB 1001036A GB 455479 A GB455479 A GB 455479A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- screen
- relating
- april
- electrical circuits
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000001419 dependent effect Effects 0.000 abstract 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/20—Prevention of damage to cathode-ray tubes in the event of failure of scanning
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
455,479. Television receivers. FERNSEH AKT.-GES., Goerzallee, Zehlendorf, Berlin. April 4, 1936, No. 10010. Convention date, April 9, 1935. [Class 40 (iii)] To prevent burning of a fluorescent screen, the production or concentration of the electron beam in a cathode ray tube is dependent on the passage of anode current through at least one associated scanning oscillator 1. A focusing coil 2 is in series with the hightension supply to the oscillator or to both of the scanning oscillators. Alternatively, a relay, in series with the high-tension supply, controls the high-tension potential or the cathode-heating current to the cathode-ray tube, or renders the area of incidence of the beam on the screen equal to the area of the screen.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE455479X | 1935-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB455479A true GB455479A (en) | 1936-10-21 |
Family
ID=6539045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10010/36A Expired GB455479A (en) | 1935-04-09 | 1936-04-04 | Improvements in or relating to electrical circuits associated with cathode-ray tubes |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2155486A (en) |
| FR (1) | FR804851A (en) |
| GB (1) | GB455479A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4723167A (en) * | 1987-02-24 | 1988-02-02 | Zenith Electronics Corporation | Turn-off circuit for projection television CRT |
| US5349382A (en) * | 1991-01-25 | 1994-09-20 | Canon Kabushiki Kaisha | Image pickup apparatus with image light focus prevention |
-
1936
- 1936-04-02 US US72408A patent/US2155486A/en not_active Expired - Lifetime
- 1936-04-04 GB GB10010/36A patent/GB455479A/en not_active Expired
- 1936-04-09 FR FR804851D patent/FR804851A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2155486A (en) | 1939-04-25 |
| FR804851A (en) | 1936-11-04 |
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