NO144404C - Detektor. - Google Patents

Detektor.

Info

Publication number: NO144404C
Authority: NO; Norway
Prior art keywords: detector
Prior art date: 1975-02-20

Application number

NO760488A

Other languages

English (en)

Other versions

NO760488L (no

NO144404B (no

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.)

1975-02-20

Filing date

1976-02-16

Publication date

1981-08-19

1976-02-16 Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp

1976-09-01 Publication of NO760488L publication Critical patent/NO760488L/no

1981-05-11 Publication of NO144404B publication Critical patent/NO144404B/no

1981-08-19 Publication of NO144404C publication Critical patent/NO144404C/no

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)
Lubrication Of Internal Combustion Engines (AREA)
Fire-Detection Mechanisms (AREA)
Spectrometry And Color Measurement (AREA)
Control Of Eletrric Generators (AREA)
Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Monitoring And Testing Of Exchanges (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 (no)	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 (no)
BR (1)	BR7507715A (no)
ES (1)	ES445388A1 (no)
FR (1)	FR2301982A1 (no)
GB (1)	GB1478219A (no)
IT (1)	IT1055300B (no)
NO (1)	NO144404C (no)

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

1975
- 1975-02-20 GB GB715875A patent/GB1478219A/en not_active Expired
- 1975-11-21 BR BR7507715*A patent/BR7507715A/pt unknown
1976
- 1976-02-16 NO NO760488A patent/NO144404C/no unknown
- 1976-02-17 IT IT20225/76A patent/IT1055300B/it active
- 1976-02-19 BE BE2054835A patent/BE838697A/xx unknown
- 1976-02-20 FR FR7604734A patent/FR2301982A1/fr not_active Withdrawn
- 1976-02-20 ES ES445388A patent/ES445388A1/es not_active Expired

Also Published As

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

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