GB428557A - Improvements in or relating to television and like apparatus - Google Patents
Improvements in or relating to television and like apparatusInfo
- Publication number
- GB428557A GB428557A GB3673133A GB3673133A GB428557A GB 428557 A GB428557 A GB 428557A GB 3673133 A GB3673133 A GB 3673133A GB 3673133 A GB3673133 A GB 3673133A GB 428557 A GB428557 A GB 428557A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wave
- grid
- valve
- television
- transmitter
- 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
- H04N5/067—Arrangements or circuits at the transmitter end
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Studio Circuits (AREA)
Abstract
428,557. Valve generating circuits; television. LANCE, T. M. C., JOHNSTONE, D. M., and BAIRD TELEVISION, Ltd., 58, Victoria Street, London. Dec. 30, 1933, No. 36731. [Classes 40 (iii) and 40 (v)] In a television or like system, the wave-form of the relaxation oscillator at the receiver is made to conform with that at the transmitter by means of a correcting-wave derived at the transmitter and sent with the synchronizing signal. As shown in Fig. 1, the condenser 2 is charged from a D.C. source through a constantcurrent device such as a screen-grid valve 5, and is discharged through a device 1 when a synchronizing signal is applied at B to its grid. The charging-valve 5 has its control grid biassed by a fixed source connected across the terminals D, E and a correcting-wave is also applied to this grid at the terminals E, F. Thus if curve a represents the saw-tooth wave-form at the transmitter, the rectilinear rising portion of the receiver wave-form c is modified by applying to the grid of valve 5 a wave b so as to result in a curve similar to a. Specification 420,091 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3673133A GB428557A (en) | 1933-12-30 | 1933-12-30 | Improvements in or relating to television and like apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3673133A GB428557A (en) | 1933-12-30 | 1933-12-30 | Improvements in or relating to television and like apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB428557A true GB428557A (en) | 1935-05-15 |
Family
ID=10390731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3673133A Expired GB428557A (en) | 1933-12-30 | 1933-12-30 | Improvements in or relating to television and like apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB428557A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741537C (en) * | 1938-01-11 | 1943-11-12 | Fernseh Gmbh | Switching arrangement for automatic elimination of the distortions that occur with electromagnetic beam deflection |
US2652796A (en) * | 1951-01-12 | 1953-09-22 | Greist Mfg Co | Blind stitch attachment for sewing machines |
-
1933
- 1933-12-30 GB GB3673133A patent/GB428557A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741537C (en) * | 1938-01-11 | 1943-11-12 | Fernseh Gmbh | Switching arrangement for automatic elimination of the distortions that occur with electromagnetic beam deflection |
US2652796A (en) * | 1951-01-12 | 1953-09-22 | Greist Mfg Co | Blind stitch attachment for sewing machines |
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