FR848015A - Signal receiver for carrier wave telephony systems - Google Patents

Signal receiver for carrier wave telephony systems

Info

Publication number
FR848015A
FR848015A FR848015DA FR848015A FR 848015 A FR848015 A FR 848015A FR 848015D A FR848015D A FR 848015DA FR 848015 A FR848015 A FR 848015A
Authority
FR
France
Prior art keywords
carrier wave
signal receiver
telephony systems
wave telephony
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR848015A publication Critical patent/FR848015A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/14—Arrangements providing for calling or supervisory signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Noise Elimination (AREA)
  • Near-Field Transmission Systems (AREA)
FR848015D 1937-12-27 1938-12-26 Signal receiver for carrier wave telephony systems Expired FR848015A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP2125D DE1080615B (en) 1937-12-27 1937-12-27 Signal receiver for carrier wave telephony systems

Publications (1)

Publication Number Publication Date
FR848015A true FR848015A (en) 1939-10-20

Family

ID=7357758

Family Applications (2)

Application Number Title Priority Date Filing Date
FR848016D Expired FR848016A (en) 1937-12-27 1938-12-26 Signal receiver for carrier wave telephone systems
FR848015D Expired FR848015A (en) 1937-12-27 1938-12-26 Signal receiver for carrier wave telephony systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR848016D Expired FR848016A (en) 1937-12-27 1938-12-26 Signal receiver for carrier wave telephone systems

Country Status (7)

Country Link
US (1) US2210957A (en)
BE (3) BE431843A (en)
CH (1) CH206315A (en)
DE (2) DE1080615B (en)
FR (2) FR848016A (en)
GB (3) GB523068A (en)
NL (1) NL52757C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564378A (en) * 1946-05-06 1951-08-14 Punch Engineering Pty Ltd Carrier system signaling circuits
FR965368A (en) * 1947-04-29 1950-09-11
NL72570C (en) * 1949-09-02
US2721979A (en) * 1950-07-07 1955-10-25 Westinghouse Air Brake Co Switching and control means for carrier signaling and communication equipments
BE557017A (en) * 1956-04-26

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT91298B (en) * 1915-12-01 1923-02-10 Western Electric Co Ltd Device for simultaneous telegraphing and telephoning with or without wire.
US1484405A (en) * 1920-01-12 1924-02-19 Western Electric Co Signaling system
DE497115C (en) * 1928-12-29 1930-05-02 Lorenz Akt Ges C Arrangement for achieving high selectivity of electrical receiving devices
AT140823B (en) * 1932-12-22 1935-02-25 Siemens Ag Multiple transmission system with carrier currents, especially for cable lines.
GB460428A (en) * 1935-08-24 1937-01-27 Philips Nv Improvements in or relating to the transmission of ringing signals in carrier frequency telephony systems

Also Published As

Publication number Publication date
DE1080615B (en) 1960-04-28
US2210957A (en) 1940-08-13
BE431870A (en)
GB504711A (en) 1939-04-28
GB523067A (en) 1940-07-04
BE431843A (en)
NL52757C (en)
CH206315A (en) 1939-07-31
GB523068A (en) 1940-07-04
FR848016A (en) 1939-10-20
BE431842A (en)
DE753441C (en) 1944-08-03

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