NO144404C - Detektor. - Google Patents

Detektor.

Info

Publication number
NO144404C
NO144404C NO760488A NO760488A NO144404C NO 144404 C NO144404 C NO 144404C NO 760488 A NO760488 A NO 760488A NO 760488 A NO760488 A NO 760488A NO 144404 C NO144404 C NO 144404C
Authority
NO
Norway
Prior art keywords
detector
Prior art date
Application number
NO760488A
Other languages
English (en)
Norwegian (no)
Other versions
NO144404B (no
NO760488L (show.php
Inventor
Ryszard Kitajewski
Anthony William Sweet
Original Assignee
Int 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of NO760488L publication Critical patent/NO760488L/no
Publication of NO144404B publication Critical patent/NO144404B/no
Publication of NO144404C publication Critical patent/NO144404C/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Control Of Eletrric Generators (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Fire-Detection Mechanisms (AREA)
NO760488A 1975-02-20 1976-02-16 Detektor. NO144404C (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB715875A GB1478219A (en) 1975-02-20 1975-02-20 Telecommunication exchange circuits

Publications (3)

Publication Number Publication Date
NO760488L NO760488L (show.php) 1976-09-01
NO144404B NO144404B (no) 1981-05-11
NO144404C true NO144404C (no) 1981-08-19

Family

ID=9827726

Family Applications (1)

Application Number Title Priority Date Filing Date
NO760488A NO144404C (no) 1975-02-20 1976-02-16 Detektor.

Country Status (7)

Country Link
BE (1) BE838697A (show.php)
BR (1) BR7507715A (show.php)
ES (1) ES445388A1 (show.php)
FR (1) FR2301982A1 (show.php)
GB (1) GB1478219A (show.php)
IT (1) IT1055300B (show.php)
NO (1) NO144404C (show.php)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2013000A (en) * 1978-01-20 1979-08-01 Hitachi Ltd Dc D.C. magnetic field cancellation circuit
GB2146872B (en) * 1983-09-15 1986-11-05 Stc Plc Hall effect module for loop detector
US5333192A (en) * 1990-06-26 1994-07-26 Northern Telecom Limited Line interface circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1158584B (de) * 1962-08-16 1963-12-05 Telefunken Patent Schaltungsanordnung zur Pruefung des Anruf- und Belegungszustandes der Teilnehmerleitungen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen mit Hilfe von Hall-Generatoren
US3848094A (en) * 1972-12-29 1974-11-12 Stromberg Carlson Corp Telephone battery feed circuit

Also Published As

Publication number Publication date
IT1055300B (it) 1981-12-21
BR7507715A (pt) 1976-08-24
BE838697A (fr) 1976-08-19
FR2301982A1 (fr) 1976-09-17
NO144404B (no) 1981-05-11
NO760488L (show.php) 1976-09-01
GB1478219A (en) 1977-06-29
ES445388A1 (es) 1977-06-16

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