FR742835A - - Google Patents
Info
- Publication number
- FR742835A FR742835A FR742835DA FR742835A FR 742835 A FR742835 A FR 742835A FR 742835D A FR742835D A FR 742835DA FR 742835 A FR742835 A FR 742835A
- Authority
- FR
- France
- 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
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
- H04N5/165—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level to maintain the black level constant
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Lasers (AREA)
- Picture Signal Circuits (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Measurement Of Radiation (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US563016A US2274686A (en) | 1931-09-16 | 1931-09-16 | Electro-optical system |
| US99023A US2274709A (en) | 1936-09-02 | 1936-09-02 | Electro-optical image production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742835A true FR742835A (es) | 1933-03-17 |
Family
ID=26795407
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742835D Expired FR742835A (es) | 1931-09-16 | ||
| FR48747D Expired FR48747E (fr) | 1931-09-16 | 1937-08-28 | Systèmes électro-optiques de production d'images avec dispositif pour la réduction de la distorsion de l'image |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR48747D Expired FR48747E (fr) | 1931-09-16 | 1937-08-28 | Systèmes électro-optiques de production d'images avec dispositif pour la réduction de la distorsion de l'image |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2274686A (es) |
| DE (1) | DE628663C (es) |
| FR (2) | FR48747E (es) |
| GB (2) | GB406672A (es) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE882416C (de) * | 1934-09-18 | 1953-07-09 | Emi Ltd | Schaltungsanordnung zur Wiedereinfuehrung der Gleichstrom-komponente in elektrische Signale |
| DE919236C (de) * | 1933-03-01 | 1954-10-18 | Rca Corp | Schaltungsanordnung zur Wiedereinfuehrung der mittleren Helligkeit bei Braunschen Fernsehempfangsroehren |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE401713A (es) * | 1933-02-28 | |||
| BE402568A (es) * | 1933-04-13 | |||
| DE753789C (de) * | 1935-03-09 | 1952-11-17 | Siemens & Halske A G | Schaltungsanordnung zur Beeinflussung von Einschwing- und Abklingzeit eines elektrischen Stromkreises |
| DE741785C (de) * | 1937-11-29 | 1943-11-17 | Fernseh Gmbh | Verfahren zur UEbertragung von Fernsehbildern, deren Helligkeitsumfang geringer ist als der zur Verfuegung stehende Modulationsbereich |
| US2476349A (en) * | 1944-09-04 | 1949-07-19 | Hartford Nat Bank & Trust Comp | Phase or frequency modulation system |
| US2705740A (en) * | 1949-12-14 | 1955-04-05 | Zenith Radio Corp | Subscription type signalling system |
-
0
- FR FR742835D patent/FR742835A/fr not_active Expired
-
1931
- 1931-09-16 US US563016A patent/US2274686A/en not_active Expired - Lifetime
-
1932
- 1932-08-31 GB GB24286/32A patent/GB406672A/en not_active Expired
- 1932-09-13 DE DEE43258A patent/DE628663C/de not_active Expired
-
1937
- 1937-08-26 GB GB23379/37A patent/GB483451A/en not_active Expired
- 1937-08-28 FR FR48747D patent/FR48747E/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE919236C (de) * | 1933-03-01 | 1954-10-18 | Rca Corp | Schaltungsanordnung zur Wiedereinfuehrung der mittleren Helligkeit bei Braunschen Fernsehempfangsroehren |
| DE882416C (de) * | 1934-09-18 | 1953-07-09 | Emi Ltd | Schaltungsanordnung zur Wiedereinfuehrung der Gleichstrom-komponente in elektrische Signale |
Also Published As
| Publication number | Publication date |
|---|---|
| US2274686A (en) | 1942-03-03 |
| GB483451A (en) | 1938-04-20 |
| FR48747E (fr) | 1938-06-21 |
| GB406672A (en) | 1934-02-28 |
| DE628663C (de) | 1936-04-08 |