FR951383A - Electrical communication systems - Google Patents

Electrical communication systems

Info

Publication number
FR951383A
FR951383A FR951383DA FR951383A FR 951383 A FR951383 A FR 951383A FR 951383D A FR951383D A FR 951383DA FR 951383 A FR951383 A FR 951383A
Authority
FR
France
Prior art keywords
communication systems
electrical communication
electrical
systems
communication
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
French (fr)
Inventor
Irving A Krause
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR951383A publication Critical patent/FR951383A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/006—Secret communication by varying or inverting the phase, at periodic or random intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR951383D 1944-04-20 1947-08-07 Electrical communication systems Expired FR951383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US531859A US2426225A (en) 1944-04-20 1944-04-20 Communication system

Publications (1)

Publication Number Publication Date
FR951383A true FR951383A (en) 1949-10-24

Family

ID=24119350

Family Applications (1)

Application Number Title Priority Date Filing Date
FR951383D Expired FR951383A (en) 1944-04-20 1947-08-07 Electrical communication systems

Country Status (5)

Country Link
US (1) US2426225A (en)
BE (1) BE479062A (en)
FR (1) FR951383A (en)
GB (1) GB591884A (en)
NL (1) NL81626C (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384705A (en) * 1944-08-29 1968-05-21 Rosen Leo Facsimile privacy apparatus
US2509064A (en) * 1945-08-23 1950-05-23 Bell Telephone Labor Inc Reduction of noise in pulse position modulation systems
US2629857A (en) * 1946-08-10 1953-02-24 Int Standard Electric Corp Communication system utilizing constant amplitude pulses of opposite polarities
US2605410A (en) * 1946-08-27 1952-07-29 Rca Corp Pulse-time discriminator
US2548796A (en) * 1947-06-02 1951-04-10 Rca Corp Double polarity pulse generator system
US2629053A (en) * 1948-03-15 1953-02-17 Phillips Petroleum Co Detonation meter calibrator
US2640151A (en) * 1949-07-14 1953-05-26 Westinghouse Electric Corp Blocking oscillator system
BE567481A (en) * 1954-06-08
CA888373A (en) * 1949-12-21 1971-12-14 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government Secret signalling system
US2678425A (en) * 1950-02-21 1954-05-11 Raytheon Mfg Co Analogue computer
US2623952A (en) * 1950-04-01 1952-12-30 Magnetic Equipment Inc Modulating system
US2714704A (en) * 1951-03-23 1955-08-02 Rca Corp Quantizing modulation circuit arrangement
US2689344A (en) * 1951-05-15 1954-09-14 Stanley R Rich Pulse modulated speech transmission system
US2863999A (en) * 1953-04-21 1958-12-09 Rca Corp Wave shaper
US2880320A (en) * 1953-04-23 1959-03-31 Syrl K Ferguson Electronic message timing circuit
US2896501A (en) * 1953-05-28 1959-07-28 Faximile Inc Apparatus for outlining contours
US2813151A (en) * 1953-10-06 1957-11-12 Bell Telephone Labor Inc Impulse signal distortion circuit
US2853634A (en) * 1954-01-05 1958-09-23 Westinghouse Electric Corp Saturable reactor keying for radio transmitters
US2961651A (en) * 1954-04-20 1960-11-22 Frank B Uphoff Synchronized system of interlaced scanning
US2855509A (en) * 1954-04-20 1958-10-07 Edward A Moore Variable delay time pulse generator
US2866094A (en) * 1954-09-29 1958-12-23 Hoffman Electronics Corp Symmetrical to asymmetrical signal conversion circuit
US3008244A (en) * 1954-11-30 1961-11-14 Smith Meeker Engineering Compa Sonar simulator
US2864954A (en) * 1957-11-01 1958-12-16 Edward L Byrne Pulse regenerator circuit
US3095508A (en) * 1959-02-06 1963-06-25 Cons Electrodynamics Corp Alternating current power control system
EP1317809A4 (en) * 2000-08-09 2005-05-18 Avway Com Inc Method and system for steganographically embedding information bits in source signals

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB431794A (en) * 1933-01-18 1935-07-16 Emanuele Boselli Improvements in or relating to electric communication systems

Also Published As

Publication number Publication date
GB591884A (en) 1947-09-01
BE479062A (en)
NL81626C (en)
US2426225A (en) 1947-08-26

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