GB461273A - Improvements in or relating to television or like systems - Google Patents
Improvements in or relating to television or like systemsInfo
- Publication number
- GB461273A GB461273A GB2290235A GB2290235A GB461273A GB 461273 A GB461273 A GB 461273A GB 2290235 A GB2290235 A GB 2290235A GB 2290235 A GB2290235 A GB 2290235A GB 461273 A GB461273 A GB 461273A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valves
- television
- wave
- potential
- impulses
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Circuits (AREA)
- Fluid-Pressure Circuits (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
461,273. Television. JOHNSTONE, D. M., and BAIRD TELEVISION, Ltd. Aug. 14, 1935, No. 22902. [Classes 40 (iii) and 40 (v)] To produce trains of synchronizing impulses, an alternating potential is applied in phase opposition to a pair of valves 1, 2, which are so controlled that only one operates during one train of impulses, but each in turn operates during successive trains, and the outputs are combined. The valves are rendered normally inoperative by a negative grid bias 4 and alternatively operative by a square-wave potential of such value as to overcome partially the negative bias on alternate valves during successive half cycles. The wave length of the square wave is exactly an even integral multiple of that of the sinusoidal alternating potential. The input circuits of the valves are in push-pull, and the valves have a common anode resistance 5. Specification 437,339 is referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2290235A GB461273A (en) | 1935-08-14 | 1935-08-14 | Improvements in or relating to television or like systems |
DEF81610D DE721055C (en) | 1935-08-14 | 1936-08-15 | Arrangement for generating mutually shifted pulse trains |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2290235A GB461273A (en) | 1935-08-14 | 1935-08-14 | Improvements in or relating to television or like systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB461273A true GB461273A (en) | 1937-02-15 |
Family
ID=10186904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2290235A Expired GB461273A (en) | 1935-08-14 | 1935-08-14 | Improvements in or relating to television or like systems |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE721055C (en) |
GB (1) | GB461273A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1140971B (en) * | 1961-01-19 | 1962-12-13 | Philips Nv | Circuit for generating two identical meander-shaped pulse trains phase-shifted by 180íÒ |
-
1935
- 1935-08-14 GB GB2290235A patent/GB461273A/en not_active Expired
-
1936
- 1936-08-15 DE DEF81610D patent/DE721055C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE721055C (en) | 1942-05-22 |
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