US2104012A - Multiplex radio signaling system - Google Patents

Multiplex radio signaling system Download PDF

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Publication number
US2104012A
US2104012A US40548A US4054835A US2104012A US 2104012 A US2104012 A US 2104012A US 40548 A US40548 A US 40548A US 4054835 A US4054835 A US 4054835A US 2104012 A US2104012 A US 2104012A
Authority
US
United States
Prior art keywords
frequency
channel
current
amplifier
modulation
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 - Lifetime
Application number
US40548A
Other languages
English (en)
Inventor
Edwin H Armstrong
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.)
Individual
Original Assignee
Individual
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 NL51362D priority Critical patent/NL51362C/xx
Application filed by Individual filed Critical Individual
Priority to US40548A priority patent/US2104012A/en
Priority to GB24941/36A priority patent/GB481527A/en
Priority to FR811208D priority patent/FR811208A/fr
Application granted granted Critical
Publication of US2104012A publication Critical patent/US2104012A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/20—Frequency-division multiplex systems in which at least one carrier is angle-modulated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/002—Transmission systems not characterised by the medium used for transmission characterised by the use of a carrier modulation
    • H04B14/006—Angle modulation

Definitions

  • 2I0 and 2 are amplifiers whose input circuits are connected across the two reactance paths and whose outputs supply the two linear rectifiers'2 I6, 2I1.
  • 222 and 223 represent two balanced transformers whose secondaries are connected to act cumulatively for frequency variations.
  • 224 is an amplifier for supplying the frequencies of channel #1 to a low pass filter 225 which eliminates undesired frequencies from the output 221 of channel one.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)
US40548A 1935-09-14 1935-09-14 Multiplex radio signaling system Expired - Lifetime US2104012A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL51362D NL51362C (fr) 1935-09-14
US40548A US2104012A (en) 1935-09-14 1935-09-14 Multiplex radio signaling system
GB24941/36A GB481527A (en) 1935-09-14 1936-09-12 Improvements in or relating to multiplex radio signalling systems
FR811208D FR811208A (fr) 1935-09-14 1936-09-14 Perfectionnements aux systèmes de radiosignalisation multiplex

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40548A US2104012A (en) 1935-09-14 1935-09-14 Multiplex radio signaling system

Publications (1)

Publication Number Publication Date
US2104012A true US2104012A (en) 1938-01-04

Family

ID=21911589

Family Applications (1)

Application Number Title Priority Date Filing Date
US40548A Expired - Lifetime US2104012A (en) 1935-09-14 1935-09-14 Multiplex radio signaling system

Country Status (4)

Country Link
US (1) US2104012A (fr)
FR (1) FR811208A (fr)
GB (1) GB481527A (fr)
NL (1) NL51362C (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746192C (de) * 1938-11-12 1944-06-19 Aeg Sendeverfahren mit Frequenzmodulation
US2481516A (en) * 1946-03-22 1949-09-13 Lance R Jacobsen Mobile telephone system
US2546307A (en) * 1947-10-01 1951-03-27 Walter C Johnson Limiter circuit for telemetering systems
US2621325A (en) * 1946-08-20 1952-12-09 Radio Electr Soc Fr Plural modulation multiplex system
US2776429A (en) * 1951-01-27 1957-01-01 Multiplex Dev Corp Multiplex communications system
US3222452A (en) * 1956-07-16 1965-12-07 Jr Thomas A Banning Pre-pay or subscription radio or television operations
US3854094A (en) * 1972-11-01 1974-12-10 Regency Electronics Crystal controlled, frequency modulated transmitter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746192C (de) * 1938-11-12 1944-06-19 Aeg Sendeverfahren mit Frequenzmodulation
US2481516A (en) * 1946-03-22 1949-09-13 Lance R Jacobsen Mobile telephone system
US2621325A (en) * 1946-08-20 1952-12-09 Radio Electr Soc Fr Plural modulation multiplex system
US2546307A (en) * 1947-10-01 1951-03-27 Walter C Johnson Limiter circuit for telemetering systems
US2776429A (en) * 1951-01-27 1957-01-01 Multiplex Dev Corp Multiplex communications system
US3222452A (en) * 1956-07-16 1965-12-07 Jr Thomas A Banning Pre-pay or subscription radio or television operations
US3854094A (en) * 1972-11-01 1974-12-10 Regency Electronics Crystal controlled, frequency modulated transmitter

Also Published As

Publication number Publication date
GB481527A (en) 1938-03-14
NL51362C (fr)
FR811208A (fr) 1937-04-09

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