FR591134A - Improvements to electrical carrier wave signaling systems - Google Patents

Improvements to electrical carrier wave signaling systems

Info

Publication number
FR591134A
FR591134A FR591134DA FR591134A FR 591134 A FR591134 A FR 591134A FR 591134D A FR591134D A FR 591134DA FR 591134 A FR591134 A FR 591134A
Authority
FR
France
Prior art keywords
carrier wave
electrical carrier
signaling systems
wave signaling
systems
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)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR591134A publication Critical patent/FR591134A/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)
  • Amplitude Modulation (AREA)
FR591134D 1923-05-12 1924-12-03 Improvements to electrical carrier wave signaling systems Expired FR591134A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US638461A US1665328A (en) 1923-05-12 1923-05-12 Carrier-wave transmission

Publications (1)

Publication Number Publication Date
FR591134A true FR591134A (en) 1925-06-29

Family

ID=24560127

Family Applications (1)

Application Number Title Priority Date Filing Date
FR591134D Expired FR591134A (en) 1923-05-12 1924-12-03 Improvements to electrical carrier wave signaling systems

Country Status (2)

Country Link
US (1) US1665328A (en)
FR (1) FR591134A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530140A (en) * 1944-08-11 1950-11-14 Tung Sol Lamp Works Inc Secret signaling system

Also Published As

Publication number Publication date
US1665328A (en) 1928-04-10

Similar Documents

Publication Publication Date Title
FR615107A (en) Carrier wave signaling systems
FR561507A (en) Improvements to telegraph systems
FR591134A (en) Improvements to electrical carrier wave signaling systems
FR588702A (en) Improvements to electrical signaling systems
FR26006E (en) Improvements to electrical carrier wave signaling systems
FR576669A (en) Improvements to electrical carrier wave transmission systems
FR585788A (en) Improvements to secret signaling systems
FR615211A (en) Improvements to electrical wave signaling systems
FR570943A (en) Improvements to electrical signaling systems
FR569019A (en) Improvements to electric wave transmission systems
FR655685A (en) Improvements to electrical signaling systems
FR27497E (en) Improvements to electrical signaling systems
FR572171A (en) Improvements to electrical signaling systems
FR610895A (en) Improvements to high frequency current signaling systems
FR615760A (en) Improvements to electrical signaling systems
FR606386A (en) Improvements to electrical signaling systems
FR580294A (en) Improvements to electrical signaling systems
FR588932A (en) Improvements to electrical signaling systems
FR608335A (en) Improvements to multiplex carrier wave signaling systems
FR534079A (en) Improvements to electrical signaling systems
FR606311A (en) Improvements to signaling systems
FR617699A (en) Improvements to modulated carrier wave signaling systems
FR563306A (en) Improvements to signaling systems
FR34032E (en) Improvements to modulated carrier wave signaling systems
FR569300A (en) Improvements to telegraph systems