FR987801A - Générateur de signaux électriques - Google Patents

Générateur de signaux électriques

Info

Publication number
FR987801A
FR987801A FR987801DA FR987801A FR 987801 A FR987801 A FR 987801A FR 987801D A FR987801D A FR 987801DA FR 987801 A FR987801 A FR 987801A
Authority
FR
France
Prior art keywords
electrical signal
signal generator
generator
electrical
signal
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
Application number
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zenith Electronics LLC
Original Assignee
Zenith Radio Corp
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.)
Filing date
Publication date
Application filed by Zenith Radio Corp filed Critical Zenith Radio Corp
Application granted granted Critical
Publication of FR987801A publication Critical patent/FR987801A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Radio Relay Systems (AREA)
  • Transmitters (AREA)
FR987801D 1948-07-21 1949-06-03 Générateur de signaux électriques Expired FR987801A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US39970A US2570187A (en) 1948-07-21 1948-07-21 Subscriber signaling system

Publications (1)

Publication Number Publication Date
FR987801A true FR987801A (fr) 1951-08-20

Family

ID=21908365

Family Applications (2)

Application Number Title Priority Date Filing Date
FR987802D Expired FR987802A (fr) 1948-07-21 1949-06-03 Récepteur de signaux électriques
FR987801D Expired FR987801A (fr) 1948-07-21 1949-06-03 Générateur de signaux électriques

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR987802D Expired FR987802A (fr) 1948-07-21 1949-06-03 Récepteur de signaux électriques

Country Status (4)

Country Link
US (1) US2570187A (fr)
FR (2) FR987802A (fr)
GB (2) GB669582A (fr)
NL (2) NL147062B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE489203A (fr) * 1948-06-05
US2769026A (en) * 1951-05-10 1956-10-30 Internat Telemeter Corp Prepaid entertainment distribution system
US2816156A (en) * 1951-06-08 1957-12-10 Zenith Radio Corp Subscription television system
US2881244A (en) * 1951-08-30 1959-04-07 Zenith Radio Corp Subscriber television system with code reset bursts in audio channel
US2843654A (en) * 1951-12-01 1958-07-15 Internat Telemeter Corp Subscription television system using land line
US2843655A (en) * 1951-12-03 1958-07-15 Internat Telemeter Corp Subscription television with scrambled transmission and marquee and barker
US2864885A (en) * 1951-12-08 1958-12-16 Zenith Radio Corp Subscriber television system
US2989580A (en) * 1952-09-09 1961-06-20 Rca Corp Television systems
US3116363A (en) * 1960-07-20 1963-12-31 Teleglobe Pay Tv System Inc Television communication system
US4638357A (en) * 1984-01-20 1987-01-20 Home Box Office, Inc. Audio scrambler

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790486A (en) * 1931-01-27 Broadcasting system
US1754876A (en) * 1924-02-09 1930-04-15 Edward F Colladay Regional system of radio broadcast distribution
US2056247A (en) * 1932-01-16 1936-10-06 Rca Corp Television apparatus
FR809489A (fr) * 1935-11-27 1937-03-03 Perfectionnement aux systèmes de synchronisation destinés notamment à la réception des images en télévision
US2136789A (en) * 1936-06-16 1938-11-15 William G H Finch Telepicture electro-optical system
GB530776A (en) * 1939-03-06 1940-12-20 Scophony Ltd Improvements in or relating to the secret transmission of television and like signals
US2403059A (en) * 1940-05-11 1946-07-02 Times Telephoto Equipment Inc Secrecy telefacsimile system
US2402058A (en) * 1941-06-25 1946-06-11 Hazeltine Research Inc Secrecy communication system
US2402067A (en) * 1941-10-30 1946-06-11 Rca Corp Device for secret communication
US2419568A (en) * 1943-07-16 1947-04-29 Standard Telephones Cables Ltd Transmission system
US2472774A (en) * 1945-10-17 1949-06-07 Farnsworth Res Corp Irregular interlace scanning system

Also Published As

Publication number Publication date
US2570187A (en) 1951-10-09
FR987802A (fr) 1951-08-20
NL147062B (nl)
GB669582A (en) 1952-04-02
GB669583A (en) 1952-04-02
NL147061B (nl)

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