GB430502A - Improvements in or relating to electric signalling systems - Google Patents

Improvements in or relating to electric signalling systems

Info

Publication number
GB430502A
GB430502A GB3589733A GB3589733A GB430502A GB 430502 A GB430502 A GB 430502A GB 3589733 A GB3589733 A GB 3589733A GB 3589733 A GB3589733 A GB 3589733A GB 430502 A GB430502 A GB 430502A
Authority
GB
United Kingdom
Prior art keywords
frequencies
energy
signalling
circuits
relay
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
GB3589733A
Other languages
English (en)
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.)
Thomas Samuel Skillman & Allem
STC PLC
Original Assignee
Thomas Samuel Skillman & Allem
Standard Telephone and Cables PLC
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 BE405429D priority Critical patent/BE405429A/xx
Application filed by Thomas Samuel Skillman & Allem, Standard Telephone and Cables PLC filed Critical Thomas Samuel Skillman & Allem
Priority to GB3589733A priority patent/GB430502A/en
Priority to FR786537D priority patent/FR786537A/fr
Priority to DEI51268D priority patent/DE667311C/de
Publication of GB430502A publication Critical patent/GB430502A/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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Feeding And Controlling Fuel (AREA)
GB3589733A 1933-12-20 1933-12-20 Improvements in or relating to electric signalling systems Expired GB430502A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE405429D BE405429A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1933-12-20
GB3589733A GB430502A (en) 1933-12-20 1933-12-20 Improvements in or relating to electric signalling systems
FR786537D FR786537A (fr) 1933-12-20 1934-12-14 Perfectionnements aux systèmes électriques de signalisation
DEI51268D DE667311C (de) 1933-12-20 1934-12-21 Signalanlage, bei der zur Vermeidung von Stoerungen durch fremde Wechselstroeme die Zeichengabe mittels mehrerer stets saemtlich und gleichzeitig ausgesandter Wechselstroeme verschiedener Frequenz erfolgt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3589733A GB430502A (en) 1933-12-20 1933-12-20 Improvements in or relating to electric signalling systems

Publications (1)

Publication Number Publication Date
GB430502A true GB430502A (en) 1935-06-20

Family

ID=10382754

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3589733A Expired GB430502A (en) 1933-12-20 1933-12-20 Improvements in or relating to electric signalling systems

Country Status (4)

Country Link
BE (1) BE405429A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE667311C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR786537A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB430502A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Also Published As

Publication number Publication date
FR786537A (fr) 1935-09-05
DE667311C (de) 1938-11-10
BE405429A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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