GB434278A - Improvements in the synchronising of television apparatus - Google Patents
Improvements in the synchronising of television apparatusInfo
- Publication number
- GB434278A GB434278A GB6149/34A GB614934A GB434278A GB 434278 A GB434278 A GB 434278A GB 6149/34 A GB6149/34 A GB 6149/34A GB 614934 A GB614934 A GB 614934A GB 434278 A GB434278 A GB 434278A
- Authority
- GB
- United Kingdom
- Prior art keywords
- synchronizing
- signals
- film
- discharge tube
- gas
- 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
- H04N5/073—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations
-
- 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
Abstract
434,278. Television. RADIOAKT.- GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. Feb. 26, 1934, No. 6149. Convention date, Feb. 25, 1933. [Class 40 (iii)] Synchronizing impulses are transmitted on the same carrier as the picture signals, and no picture signals are transmitted during the transmission of synchronizing signals. The synchronizing signals are produced optically by a clear margin on a film with a picture of less width than the aperture spacing of a scanning disc. The clear margin is strongly illuminated by an appropriately shaped beam of light. The film with the light margin may be projected on the scanning disc on a slightly reduced scale so that the total area corresponds with the normal area of the film. The Specification as open to inspection under Sect. 91 also describes producing the synchronizing signal by a gas-discharge tube as described in Specification 431,521. Whena separate photo-electric cell 25 is used for generating the synchronizing signals, the latter control, directly or through tuned circuits, a gas-discharge tube 31 with a parallel condenser which short-circuits the picturesignal amplifier 27, during the transmission of synchronizing signals. A rotary switch may be used instead of the gas discharge tube. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE434278X | 1933-02-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB434278A true GB434278A (en) | 1935-08-26 |
Family
ID=6505087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6149/34A Expired GB434278A (en) | 1933-02-25 | 1934-02-26 | Improvements in the synchronising of television apparatus |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR769003A (en) |
| GB (1) | GB434278A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE740116C (en) * | 1934-12-02 | 1943-10-12 | Opta Radio Ag | Arrangement for the optical-electrical generation of synchronization characters in television |
-
1934
- 1934-02-23 FR FR769003D patent/FR769003A/en not_active Expired
- 1934-02-26 GB GB6149/34A patent/GB434278A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR769003A (en) | 1934-08-17 |
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