GB466571A - Improvements in or relating to television - Google Patents
Improvements in or relating to televisionInfo
- Publication number
- GB466571A GB466571A GB33144/35A GB3314435A GB466571A GB 466571 A GB466571 A GB 466571A GB 33144/35 A GB33144/35 A GB 33144/35A GB 3314435 A GB3314435 A GB 3314435A GB 466571 A GB466571 A GB 466571A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- source
- varied
- conducting
- varying
- 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1607—Supply circuits
- H04B1/1623—Supply circuits using tubes
-
- 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
-
- 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
- H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/08—Separation of synchronising signals from picture signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/52—Automatic gain control
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
- Picture Signal Circuits (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Synchronizing For Television (AREA)
- Television Systems (AREA)
Abstract
466,571. Television transmitters. RADIOAKT.-GES. D. S. LOEWE. Nov. 29, 1935, No. 33144. Convention date, Dec. 1, 1934. Addition to 441,761. [Class 40 (iii)] The parent Specification discloses a system of inserting synchronizing signals in the image signal train by rendering a valve 10, Fig. 1, conducting and so reducing the potential of the line 5 connecting the image signal amplifier 2 to the transmitter 4. According to the present invention, the condensers 6, 7, are avoided and the line 5 is connected to a source of negative potential during the synchronizing signal periods. Control signals are applied from 12, Fig. 2, to render valve 10 conducting and connect the line 5 to a source 9<1> of negative potential. The amplitude of the synchronizing signals may be varied by varying the voltage of 91, but the grid bias 11<1> must also be varied and this is preferably done by varying an earthed tapping on a single source comprising 91 and 11<1>. The control signals are preferably produced by light 13, Fig. 3, falling on a cell 17 through the scanning aperture at the end of each line. Specification 464,049 is referred to.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE445428X | 1933-10-11 | ||
| DE2226992X | 1933-12-06 | ||
| DE2163215X | 1934-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB466571A true GB466571A (en) | 1937-05-31 |
Family
ID=32073686
Family Applications (6)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15148/34A Expired GB441761A (en) | 1933-10-11 | 1934-05-22 | Improvements in or relating to the method and means for the synchronisation of television receivers by the transmitter |
| GB29094/34A Expired GB445428A (en) | 1933-10-11 | 1934-10-11 | Method for synchronising the reception of television images |
| GB34895/34A Expired GB451578A (en) | 1933-10-11 | 1934-12-05 | Improvements in television systems |
| GB19660/35A Expired GB453463A (en) | 1933-10-11 | 1934-12-05 | Method and arrangement for producing regulating biasses |
| GB16431/35A Expired GB459602A (en) | 1933-10-11 | 1935-06-06 | Method of and arrangement for producing synchronising impulses for television transmitters |
| GB33144/35A Expired GB466571A (en) | 1933-10-11 | 1935-11-29 | Improvements in or relating to television |
Family Applications Before (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15148/34A Expired GB441761A (en) | 1933-10-11 | 1934-05-22 | Improvements in or relating to the method and means for the synchronisation of television receivers by the transmitter |
| GB29094/34A Expired GB445428A (en) | 1933-10-11 | 1934-10-11 | Method for synchronising the reception of television images |
| GB34895/34A Expired GB451578A (en) | 1933-10-11 | 1934-12-05 | Improvements in television systems |
| GB19660/35A Expired GB453463A (en) | 1933-10-11 | 1934-12-05 | Method and arrangement for producing regulating biasses |
| GB16431/35A Expired GB459602A (en) | 1933-10-11 | 1935-06-06 | Method of and arrangement for producing synchronising impulses for television transmitters |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US2226992A (en) |
| BE (3) | BE395149A (en) |
| FR (6) | FR773649A (en) |
| GB (6) | GB441761A (en) |
| NL (3) | NL44585C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2254204A (en) * | 1936-05-15 | 1941-09-02 | Emi Ltd | Television system |
| DE741786C (en) * | 1936-07-17 | 1943-11-17 | Opta Radio Ag | Television scanning arrangement in which the light beam scanning the image is also used to generate synchronizing characters |
| DE755948C (en) * | 1937-01-09 | 1955-07-28 | Opta Radio A G | Amplitude filter circuit for the separation of picture content signals and synchronization characters in television |
| DE757397C (en) * | 1937-03-18 | 1952-12-01 | Emi Ltd | Circuit for separating parts of a voltage curve that fluctuates over time |
| DE882252C (en) * | 1938-11-10 | 1953-07-06 | Telefunken Gmbh | Circuit for the decrease of the control voltages for the line and line extension deflection in television receivers |
| DE742435C (en) * | 1938-12-25 | 1943-12-03 | Fernseh Gmbh | Arrangement for separating the line and picture change pulses of the same amplitude, but different duration and frequency, when watching television |
| US2532799A (en) * | 1944-08-01 | 1950-12-05 | Rca Corp | Facsimile system having rotating scanner moving longitudinally within stationary transparent drum |
| NL74227C (en) * | 1948-09-11 | |||
| AU3412095A (en) | 1994-08-26 | 1996-03-22 | Kensington Microware Limited | Security device for a portable computer |
| US6662602B1 (en) | 1996-11-08 | 2003-12-16 | Acco Brands, Inc. | Security device for a portable computer |
-
0
- NL NL43702D patent/NL43702C/xx active
- BE BE412530D patent/BE412530A/xx unknown
- NL NL45395D patent/NL45395C/xx active
- BE BE405608D patent/BE405608A/xx unknown
- BE BE395149D patent/BE395149A/xx unknown
- NL NL44585D patent/NL44585C/xx active
-
1934
- 1934-05-18 FR FR773649D patent/FR773649A/en not_active Expired
- 1934-05-22 GB GB15148/34A patent/GB441761A/en not_active Expired
- 1934-10-10 FR FR779533D patent/FR779533A/en not_active Expired
- 1934-10-11 GB GB29094/34A patent/GB445428A/en not_active Expired
- 1934-12-05 US US756125A patent/US2226992A/en not_active Expired - Lifetime
- 1934-12-05 GB GB34895/34A patent/GB451578A/en not_active Expired
- 1934-12-05 GB GB19660/35A patent/GB453463A/en not_active Expired
- 1934-12-05 FR FR45574D patent/FR45574E/en not_active Expired
-
1935
- 1935-04-04 FR FR46082D patent/FR46082E/en not_active Expired
- 1935-04-05 US US14846A patent/US2163215A/en not_active Expired - Lifetime
- 1935-06-06 GB GB16431/35A patent/GB459602A/en not_active Expired
- 1935-06-06 FR FR46290D patent/FR46290E/en not_active Expired
- 1935-11-29 FR FR46739D patent/FR46739E/en not_active Expired
- 1935-11-29 GB GB33144/35A patent/GB466571A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR46082E (en) | 1936-02-15 |
| FR45574E (en) | 1935-10-17 |
| GB445428A (en) | 1936-04-09 |
| GB453463A (en) | 1936-09-07 |
| GB459602A (en) | 1937-01-06 |
| FR779533A (en) | 1934-04-08 |
| GB451578A (en) | 1936-08-05 |
| NL44585C (en) | |
| BE412530A (en) | |
| BE395149A (en) | |
| US2163215A (en) | 1939-06-20 |
| GB441761A (en) | 1936-01-22 |
| NL43702C (en) | |
| BE405608A (en) | |
| FR773649A (en) | 1934-11-22 |
| US2226992A (en) | 1940-12-31 |
| FR46739E (en) | 1936-08-10 |
| NL45395C (en) | |
| FR46290E (en) | 1936-04-08 |
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