FR953780A - Electrical signaling systems - Google Patents

Electrical signaling systems

Info

Publication number
FR953780A
FR953780A FR953780DA FR953780A FR 953780 A FR953780 A FR 953780A FR 953780D A FR953780D A FR 953780DA FR 953780 A FR953780 A FR 953780A
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)
Inventor
Esmond Philip Goodwin Wright
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR953780A publication Critical patent/FR953780A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
FR953780D 1946-01-18 1947-01-17 Electrical signaling systems Expired FR953780A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB163147A GB642538A (en) 1946-01-18 1946-01-18 Improvements in or relating to alternating current signalling equipment systems

Publications (1)

Publication Number Publication Date
FR953780A true FR953780A (en) 1949-12-13

Family

ID=9725280

Family Applications (1)

Application Number Title Priority Date Filing Date
FR953780D Expired FR953780A (en) 1946-01-18 1947-01-17 Electrical signaling systems

Country Status (2)

Country Link
FR (1) FR953780A (en)
GB (1) GB642538A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954616C (en) * 1953-09-10 1956-12-20 Siemens Ag Key counter with capacitor storage

Also Published As

Publication number Publication date
GB642538A (en) 1950-09-06

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