FR1599099A - - Google Patents

Info

Publication number
FR1599099A
FR1599099A FR1599099DA FR1599099A FR 1599099 A FR1599099 A FR 1599099A FR 1599099D A FR1599099D A FR 1599099DA FR 1599099 A FR1599099 A FR 1599099A
Authority
FR
France
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
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 filed Critical
Application granted granted Critical
Publication of FR1599099A publication Critical patent/FR1599099A/fr
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
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
FR1599099D 1967-11-30 1968-10-22 Expired FR1599099A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB54588/67A GB1200909A (en) 1967-11-30 1967-11-30 Loop current detector

Publications (1)

Publication Number Publication Date
FR1599099A true FR1599099A (fr) 1970-07-15

Family

ID=10471497

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1599099D Expired FR1599099A (fr) 1967-11-30 1968-10-22

Country Status (9)

Country Link
US (1) US3579106A (fr)
BE (1) BE724752A (fr)
BR (1) BR6804450D0 (fr)
CH (1) CH483765A (fr)
DE (1) DE1811645A1 (fr)
ES (1) ES360942A1 (fr)
FR (1) FR1599099A (fr)
GB (1) GB1200909A (fr)
NL (1) NL6817093A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2360375C3 (de) * 1973-12-04 1978-05-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur Bewertung eines Stromes nach Größe und Richtung
JPS5637793A (en) * 1979-09-05 1981-04-11 Hitachi Ltd Loop detecting circuit
JPS6022571B2 (ja) * 1979-12-05 1985-06-03 株式会社日立製作所 地絡保護方式
CA2926612A1 (fr) * 2013-09-30 2015-04-02 Welladv Oil Service Limited Un dispositif auxiliaire de forage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047804A (en) * 1962-07-31 Apparatus for removing spurious signals
US2851638A (en) * 1957-07-03 1958-09-09 Reeves Instrument Corp Voltage magnitude comparison circuit

Also Published As

Publication number Publication date
BE724752A (fr) 1969-06-02
CH483765A (de) 1969-12-31
DE1811645A1 (de) 1969-07-24
NL6817093A (fr) 1969-06-03
US3579106A (en) 1971-05-18
ES360942A1 (es) 1970-08-01
GB1200909A (en) 1970-08-05
BR6804450D0 (pt) 1973-03-08

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Legal Events

Date Code Title Description
ST Notification of lapse