GB1318156A - Current detector for signalling and like systems - Google Patents

Current detector for signalling and like systems

Info

Publication number
GB1318156A
GB1318156A GB3607271A GB3607271A GB1318156A GB 1318156 A GB1318156 A GB 1318156A GB 3607271 A GB3607271 A GB 3607271A GB 3607271 A GB3607271 A GB 3607271A GB 1318156 A GB1318156 A GB 1318156A
Authority
GB
United Kingdom
Prior art keywords
relay
current
line
range
output
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
GB3607271A
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.)
Alcatel CIT SA
Original Assignee
Compagnie Industrielle de Telecommunication CIT Alcatel SA
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 Compagnie Industrielle de Telecommunication CIT Alcatel SA filed Critical Compagnie Industrielle de Telecommunication CIT Alcatel SA
Publication of GB1318156A publication Critical patent/GB1318156A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
GB3607271A 1970-07-30 1971-07-30 Current detector for signalling and like systems Expired GB1318156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7028235A FR2098898A5 (enExample) 1970-07-30 1970-07-30

Publications (1)

Publication Number Publication Date
GB1318156A true GB1318156A (en) 1973-05-23

Family

ID=9059541

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3607271A Expired GB1318156A (en) 1970-07-30 1971-07-30 Current detector for signalling and like systems

Country Status (9)

Country Link
US (1) US3777068A (enExample)
BE (1) BE770464A (enExample)
CA (1) CA972092A (enExample)
CH (1) CH549922A (enExample)
DE (1) DE2138212A1 (enExample)
FR (1) FR2098898A5 (enExample)
GB (1) GB1318156A (enExample)
IT (1) IT951971B (enExample)
NL (1) NL7110619A (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3036801C2 (de) * 1980-09-30 1982-08-26 Ritto-Werk Loh GmbH & Co KG, 6348 Herborn Schaltungsanordnung zur Übertragung von Gleichstrom-Kennzeichen über eine zweiradrige Leitung von einer Sendestelle zu einer Empfangsstelle, insbesondere von einer Sprechstelle zu der Zentrale einer Sprechanlage
CA2091940C (en) * 1993-03-18 2000-05-02 Robert St. Louis Dual element electrical clothes dryer with single element interrupt circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008563A (en) * 1935-07-16 Electrical selector system
US1761115A (en) * 1927-09-02 1930-06-03 John E Gardner Automatic telephone system
BE669624A (enExample) * 1964-09-15
FR1462275A (fr) * 1965-09-10 1966-04-15 Cit Alcatel Dispositif de numérotation par clavier
NL6604015A (enExample) * 1966-03-26 1967-09-27

Also Published As

Publication number Publication date
FR2098898A5 (enExample) 1972-03-10
US3777068A (en) 1973-12-04
CA972092A (en) 1975-07-29
IT951971B (it) 1973-07-10
DE2138212A1 (de) 1972-02-03
NL7110619A (enExample) 1972-02-01
CH549922A (fr) 1974-05-31
BE770464A (fr) 1972-01-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee