BE513500A - - Google Patents

Info

Publication number
BE513500A
BE513500A BE513500DA BE513500A BE 513500 A BE513500 A BE 513500A BE 513500D A BE513500D A BE 513500DA BE 513500 A BE513500 A BE 513500A
Authority
BE
Belgium
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
Publication of BE513500A publication Critical patent/BE513500A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
    • C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
    • C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
    • C07D239/46—Two or more oxygen, sulphur or nitrogen atoms
    • C07D239/47—One nitrogen atom and one oxygen or sulfur atom, e.g. cytosine
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
    • C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
    • C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
    • C07D239/46—Two or more oxygen, sulphur or nitrogen atoms
    • C07D239/48—Two nitrogen atoms
    • C07D239/49—Two nitrogen atoms with an aralkyl radical, or substituted aralkyl radical, attached in position 5, e.g. trimethoprim
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/04—Distributors combined with modulators or demodulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Rectifiers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electrotherapy Devices (AREA)
  • Amplifiers (AREA)
BE513500D 1951-08-13 1952-08-13 BE513500A (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE718155X 1951-08-13

Publications (1)

Publication Number Publication Date
BE513500A true BE513500A (ro) 1952-08-30

Family

ID=6626875

Family Applications (2)

Application Number Title Priority Date Filing Date
BE513500D BE513500A (ro) 1951-08-13 1952-08-13
BE545026D BE545026A (ro) 1951-08-13 1956-02-07

Family Applications After (1)

Application Number Title Priority Date Filing Date
BE545026D BE545026A (ro) 1951-08-13 1956-02-07

Country Status (5)

Country Link
US (1) US2747023A (ro)
BE (2) BE513500A (ro)
DE (2) DE897853C (ro)
FR (2) FR1090934A (ro)
GB (1) GB718155A (ro)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1003272B (de) * 1957-06-26 1957-02-28 Siemens Ag Zahlengeber mit einem Abgreifer, der zur Bestimmung der Stromstosszahl von Stromstossreihen durch Speicherkontakte gekennzeichnete Markierpunkte sucht, insbesondere fuer Fernsprechanlagen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308433A (en) * 1963-01-10 1967-03-07 Rca Corp Switching matrix
DE3045512C2 (de) * 1980-12-03 1982-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektronische Durchschalteinrichtung für Fernseh- und Tonrundfunkprogramme
CA2955961A1 (en) 2014-07-28 2016-02-04 Econolite Group, Inc. Self-configuring traffic signal controller

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2117639A (en) * 1935-08-07 1938-05-17 Fay G Johnson Traffic signal
US2541932A (en) * 1948-05-19 1951-02-13 Bell Telephone Labor Inc Multiplex speech interpolation system
BE496916A (ro) * 1949-07-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1003272B (de) * 1957-06-26 1957-02-28 Siemens Ag Zahlengeber mit einem Abgreifer, der zur Bestimmung der Stromstosszahl von Stromstossreihen durch Speicherkontakte gekennzeichnete Markierpunkte sucht, insbesondere fuer Fernsprechanlagen

Also Published As

Publication number Publication date
DE951458C (de) 1956-10-31
BE545026A (ro) 1959-10-09
DE897853C (de) 1953-11-26
US2747023A (en) 1956-05-22
FR1090934A (fr) 1955-04-05
GB718155A (en) 1954-11-10
FR69952E (fr) 1959-01-30

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