GB769369A - Improvements in or relating to a telephone signalling system employing low frequencyalternating current - Google Patents

Improvements in or relating to a telephone signalling system employing low frequencyalternating current

Info

Publication number
GB769369A
GB769369A GB9452/55A GB945255A GB769369A GB 769369 A GB769369 A GB 769369A GB 9452/55 A GB9452/55 A GB 9452/55A GB 945255 A GB945255 A GB 945255A GB 769369 A GB769369 A GB 769369A
Authority
GB
United Kingdom
Prior art keywords
relay
pulses
pulse
condenser
line
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
GB9452/55A
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.)
FRANCOIS LE GEUN
Original Assignee
FRANCOIS LE GEUN
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 FRANCOIS LE GEUN filed Critical FRANCOIS LE GEUN
Publication of GB769369A publication Critical patent/GB769369A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Meter Arrangements (AREA)
GB9452/55A 1954-03-31 1955-03-31 Improvements in or relating to a telephone signalling system employing low frequencyalternating current Expired GB769369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1102151T 1954-03-31

Publications (1)

Publication Number Publication Date
GB769369A true GB769369A (en) 1957-03-06

Family

ID=9621464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9452/55A Expired GB769369A (en) 1954-03-31 1955-03-31 Improvements in or relating to a telephone signalling system employing low frequencyalternating current

Country Status (4)

Country Link
BE (1) BE535840A (enExample)
CH (1) CH321343A (enExample)
FR (1) FR1102151A (enExample)
GB (1) GB769369A (enExample)

Also Published As

Publication number Publication date
BE535840A (enExample)
FR1102151A (fr) 1955-10-18
CH321343A (fr) 1957-04-30

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