GB320091A - Secrecy systems for signalling - Google Patents

Secrecy systems for signalling

Info

Publication number
GB320091A
GB320091A GB1936128A GB1936128A GB320091A GB 320091 A GB320091 A GB 320091A GB 1936128 A GB1936128 A GB 1936128A GB 1936128 A GB1936128 A GB 1936128A GB 320091 A GB320091 A GB 320091A
Authority
GB
United Kingdom
Prior art keywords
band
frequency
filter
oscillator
bands
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
GB1936128A
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.)
WESTERN ELECTRIC Y
Original Assignee
WESTERN ELECTRIC Y
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
Priority to NL24635D priority Critical patent/NL24635C/xx
Priority to BE353045D priority patent/BE353045A/xx
Application filed by WESTERN ELECTRIC Y filed Critical WESTERN ELECTRIC Y
Priority to GB1936128A priority patent/GB320091A/en
Priority to FR658499D priority patent/FR658499A/fr
Publication of GB320091A publication Critical patent/GB320091A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
GB1936128A 1928-07-04 1928-07-04 Secrecy systems for signalling Expired GB320091A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL24635D NL24635C (enrdf_load_stackoverflow) 1928-07-04
BE353045D BE353045A (enrdf_load_stackoverflow) 1928-07-04
GB1936128A GB320091A (en) 1928-07-04 1928-07-04 Secrecy systems for signalling
FR658499D FR658499A (fr) 1928-07-04 1928-08-02 Systèmes de transmission d'ondes électriques assurant le secret des communications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1936128A GB320091A (en) 1928-07-04 1928-07-04 Secrecy systems for signalling

Publications (1)

Publication Number Publication Date
GB320091A true GB320091A (en) 1929-10-04

Family

ID=10128057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1936128A Expired GB320091A (en) 1928-07-04 1928-07-04 Secrecy systems for signalling

Country Status (4)

Country Link
BE (1) BE353045A (enrdf_load_stackoverflow)
FR (1) FR658499A (enrdf_load_stackoverflow)
GB (1) GB320091A (enrdf_load_stackoverflow)
NL (1) NL24635C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE353045A (enrdf_load_stackoverflow)
FR658499A (fr) 1929-06-15
NL24635C (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US2270899A (en) Frequency modulation system
US2577731A (en) High-frequency traffic system over power supply lines
US2212338A (en) Frequency modulation
US2378298A (en) Composite-modulation radio service system
US1773116A (en) Single-side-band system
US3824470A (en) Communications system and method for transmitting over a limited bandwidth transmission link
GB320091A (en) Secrecy systems for signalling
US2276863A (en) Signaling by modulated waves
US2284706A (en) Arrangement for the transmission of intelligence
US1984451A (en) Short wave radio signaling
US1638925A (en) High-frequency signaling system
US1474426A (en) Secret-communication system
US2378013A (en) Synthetic modulator system
US1502889A (en) Method of and system for radiosignaling
US1911091A (en) Signaling
US1593365A (en) Method and system of high-frequency transmission
GB253152A (en) Improvements in or relating to wireless telegraphy and telephony
US3490044A (en) Communications system
US1838762A (en) System and apparatus for secret radio communication
US1954185A (en) Method of transmitting signals on short radiowaves
US1465357A (en) Radiocommunication
US1464097A (en) Two-way-signaling system
GB336096A (en) Improvements in multiplex high frequency signalling systems
US2315567A (en) Secret signaling system
US1738235A (en) Signaling