GB495902A - Synchronisation of television scanning means - Google Patents
Synchronisation of television scanning meansInfo
- Publication number
- GB495902A GB495902A GB22852/37A GB2285237A GB495902A GB 495902 A GB495902 A GB 495902A GB 22852/37 A GB22852/37 A GB 22852/37A GB 2285237 A GB2285237 A GB 2285237A GB 495902 A GB495902 A GB 495902A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ray
- cell
- frame
- scanned
- glass sheets
- 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)
- Facsimile Scanning Arrangements (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
495,902. Television ; cathode - ray tubes. RADIOAKT.-GES. D. S. LOEWE, Aug. 20, 1937, No. 22852. Convention date. Aug. 21, 1936. [Classes 39 (i) and 40 (iii)] When a scanning ray enters a glass sheet 4 at the edge of a scanned frame 3, the ray is reflected internally through a right-angle by a rear reflecting edge 5 at an angle of 45‹ and is led to a photo-electric cell 8. A condensing lens 7 focuses the ray on the cell. Line and framing signals are produced by glass sheets at the vertical and the horizontal edge of the frame, and both sheets lead the ray to the same cell, Fig. 2 (not shown). The cell 8 and the cell 10, which is behind the scanning frame and produces the image signal, are connected to a common amplifier 11. Alternatively the glass sheets lead the ray to the cell 10. A scene is scanned by projecting the scanning frame on it, Fig. 5 (not shown). When the fluorescent screen of a cathode-ray tube is scanned by an electronic ray and projected on the scene to be transmitted, the glass sheets are on the edges of the screen and are covered with a fluorescent layer, Fig. 6 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER96843D DE741786C (en) | 1936-07-17 | 1936-07-17 | Television scanning arrangement in which the light beam scanning the image is also used to generate synchronizing characters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB495902A true GB495902A (en) | 1938-11-22 |
Family
ID=25944726
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19631/37A Expired GB498841A (en) | 1936-07-17 | 1937-07-15 | Improvements in the production of synchronizing signals in television transmitters |
| GB22852/37A Expired GB495902A (en) | 1936-07-17 | 1937-08-20 | Synchronisation of television scanning means |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19631/37A Expired GB498841A (en) | 1936-07-17 | 1937-07-15 | Improvements in the production of synchronizing signals in television transmitters |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2185445A (en) |
| DE (1) | DE741786C (en) |
| FR (2) | FR824451A (en) |
| GB (2) | GB498841A (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2050363A (en) * | 1927-12-28 | 1936-08-11 | Bell Telephone Labor Inc | Synchronizing system |
| FR742671A (en) * | 1931-09-30 | 1933-03-13 | ||
| GB413561A (en) * | 1932-12-02 | 1934-07-19 | Telefunken Gmbh | Improvements in or relating to television and like facsimile telegraph systems |
| NL43702C (en) * | 1933-10-11 | |||
| FR787336A (en) * | 1934-03-03 | 1935-09-20 | Director device and controller for subsequent synchronization of sound films |
-
1936
- 1936-07-17 DE DER96843D patent/DE741786C/en not_active Expired
-
1937
- 1937-07-10 US US152950A patent/US2185445A/en not_active Expired - Lifetime
- 1937-07-15 GB GB19631/37A patent/GB498841A/en not_active Expired
- 1937-07-16 FR FR824451D patent/FR824451A/en not_active Expired
- 1937-08-20 FR FR48734D patent/FR48734E/en not_active Expired
- 1937-08-20 GB GB22852/37A patent/GB495902A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR824451A (en) | 1938-02-09 |
| DE741786C (en) | 1943-11-17 |
| GB498841A (en) | 1939-01-16 |
| FR48734E (en) | 1938-06-21 |
| US2185445A (en) | 1940-01-02 |
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