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FR733759A - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR733759A
FR733759A FR733759DA FR733759A FR 733759 A FR733759 A FR 733759A FR 733759D A FR733759D A FR 733759DA FR 733759 A FR733759 A FR 733759A
Authority
FR
France
Prior art keywords
signaling systems
electrical signaling
electrical
systems
signaling
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.)
AUTOMATIC ELECTRIC CO Ltd
Original Assignee
AUTOMATIC ELECTRIC CO Ltd
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 AUTOMATIC ELECTRIC CO Ltd filed Critical AUTOMATIC ELECTRIC CO Ltd
Application granted granted Critical
Publication of FR733759A publication Critical patent/FR733759A/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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)
  • Amplifiers (AREA)
FR733759D 1931-03-17 1932-03-16 Improvements to electrical signaling systems Expired FR733759A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8156/31A GB375346A (en) 1931-03-17 1931-03-17 Improvements in audio frequency signalling systems

Publications (1)

Publication Number Publication Date
FR733759A true FR733759A (en) 1932-10-11

Family

ID=9846823

Family Applications (1)

Application Number Title Priority Date Filing Date
FR733759D Expired FR733759A (en) 1931-03-17 1932-03-16 Improvements to electrical signaling systems

Country Status (3)

Country Link
US (1) US1932679A (en)
FR (1) FR733759A (en)
GB (1) GB375346A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468574A (en) * 1945-03-23 1949-04-26 Teletype Corp Selective control of printer motors at outlying telegraph stations
US2596977A (en) * 1947-10-08 1952-05-20 Int Standard Electric Corp Ringing equipment
DE954519C (en) * 1951-12-13 1956-12-20 Standard Elek K Ag Circuit arrangement for receiving call and dialing signals

Also Published As

Publication number Publication date
GB375346A (en) 1932-06-17
US1932679A (en) 1933-10-31

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