NL74917C - - Google Patents

Info

Publication number: NL74917C
Authority: NL; Netherlands

Application number

Priority date (The priority date 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 date listed.)

1949-01-26

Publication of NL74917C publication Critical patent/NL74917C/xx

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
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
- 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
- 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
- H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
- H04N5/185—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level

NL74917D 1949-01-26 NL74917C (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US72800A US2630486A (en)	1949-01-26	1949-01-26	Low-frequency restoration circuit

Publications (1)

Publication Number	Publication Date
NL74917C true NL74917C (xx)

Family

ID=22109829

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL74917D NL74917C (xx)	1949-01-26

Country Status (6)

Country	Link
US (1)	US2630486A (xx)
BE (1)	BE493511A (xx)
CH (1)	CH284637A (xx)
FR (1)	FR1008047A (xx)
GB (1)	GB668491A (xx)
NL (1)	NL74917C (xx)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE967770C (de) *	1952-04-17	1957-12-12	Marconi Wireless Telegraph Co	Schaltungsanordnung zur Verminderung oder Beseitigung von Brummspannungen in Fernsehsignalen
US2883621A (en) *	1953-05-01	1959-04-21	Honeywell Regulator Co	Electrical measuring apparatus
US2843662A (en) *	1954-08-11	1958-07-15	Bell Telephone Labor Inc	Shunt clamper of the feedback type
US2929928A (en) *	1955-07-01	1960-03-22	Hughes Aircraft Co	Signal conversion system
US3008007A (en) *	1956-09-27	1961-11-07	Philips Corp	Receiver for use in frequency shift telegraphy
NL94889C (xx) *	1956-09-27
NL223074A (xx) *	1956-12-15
US3196361A (en) *	1961-07-24	1965-07-20	Blonder Tongue Elect	Wide-band video signal amplifier system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1773772A (en) *	1926-12-30	1930-08-26	American Telephone & Telegraph	Harmonic suppressor
DE878512C (de) *	1935-03-20	1953-04-16	Emi Ltd	Verfahren zur Fadingregelung oder zur Wiedereinfuehrung der Gleich-stromkomponente in elektrische Signale, insbesondere beim Fernsehen
US2151145A (en) *	1935-11-08	1939-03-21	Emi Ltd	Reduction of interference in electric signal transmission systems
US2223982A (en) *	1937-01-29	1940-12-03	Rca Corp	Radio system
GB505057A (en) *	1937-02-08	1939-05-04	Cfcmug	Improvements in or relating to television or telecinema transmitters
GB525629A (en) *	1938-02-25	1940-09-02	Telefunken Gmbh	Improvements in or relating to television systems
GB515362A (en) *	1938-05-30	1939-12-04	Alan Dower Blumlein	Improvements in or relating to the transmission of electrical signals having a direct current component
US2323762A (en) *	1940-01-31	1943-07-06	Rca Corp	Measurement and recording of transient peak voltages

0
- BE BE493511D patent/BE493511A/xx unknown
- NL NL74917D patent/NL74917C/xx active
1949
- 1949-01-26 US US72800A patent/US2630486A/en not_active Expired - Lifetime
- 1949-12-30 CH CH284637D patent/CH284637A/de unknown
1950
- 1950-01-06 FR FR1008047D patent/FR1008047A/fr not_active Expired
- 1950-01-20 GB GB1561/50A patent/GB668491A/en not_active Expired

Also Published As

Publication number	Publication date
US2630486A (en)	1953-03-03
GB668491A (en)	1952-03-19
FR1008047A (fr)	1952-05-13
BE493511A (xx)
CH284637A (de)	1952-07-31

Publication	Publication Date	Title
AT166754B (xx)	1950-09-25
AT193848B (xx)	1957-12-10
NL75691C (xx)	1954-08-16
BE487732A (xx)	1949-03-31
BE437616A (xx)
BE457200A (xx)
NL74917C (xx)
BE449134A (xx)
BE487748A (xx)
BE155588A (xx)
BE487776A (xx)	1949-03-31
BE476829A (xx)
BE495368A (xx)	1950-08-16
BE496052A (xx)	1950-09-16
BE479156A (xx)
BE480597A (xx)
BE480618A (xx)
BE482756A (xx)
BE483443A (xx)
BE483689A (xx)
BE485768A (xx)
BE485770A (xx)
BE486689A (xx)	1949-01-31
BE486819A (xx)
BE487077A (xx)	1949-02-15