IT967481B - Dispositivo per segnalazione sono ra utilizzante una sorgente di corrente continua - Google Patents

Dispositivo per segnalazione sono ra utilizzante una sorgente di corrente continua

Info

Publication number
IT967481B
IT967481B IT2922172A IT2922172A IT967481B IT 967481 B IT967481 B IT 967481B IT 2922172 A IT2922172 A IT 2922172A IT 2922172 A IT2922172 A IT 2922172A IT 967481 B IT967481 B IT 967481B
Authority
IT
Italy
Prior art keywords
signaling
direct current
current source
source
direct
Prior art date
Application number
IT2922172A
Other languages
English (en)
Italian (it)
Original Assignee
Saparel
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 Saparel filed Critical Saparel
Application granted granted Critical
Publication of IT967481B publication Critical patent/IT967481B/it

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • 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
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Relay Circuits (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
IT2922172A 1971-09-17 1972-09-15 Dispositivo per segnalazione sono ra utilizzante una sorgente di corrente continua IT967481B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7133615A FR2152486B1 (fr) 1971-09-17 1971-09-17

Publications (1)

Publication Number Publication Date
IT967481B true IT967481B (it) 1974-02-28

Family

ID=9083139

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2922172A IT967481B (it) 1971-09-17 1972-09-15 Dispositivo per segnalazione sono ra utilizzante una sorgente di corrente continua

Country Status (9)

Country Link
AR (1) AR193434A1 (fr)
BE (1) BE788631A (fr)
BR (1) BR7206373D0 (fr)
DE (1) DE2244894A1 (fr)
ES (1) ES406763A1 (fr)
FR (1) FR2152486B1 (fr)
IT (1) IT967481B (fr)
LU (1) LU66054A1 (fr)
NL (1) NL7212389A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466813A1 (fr) * 1979-09-28 1981-04-10 Legrand Sa Avertisseur sonore electronique autonome et installation correspondante
GB2097256B (en) * 1981-04-02 1985-05-30 Morelle Jean V Compositions containing n-butyryl alphaaminoacids

Also Published As

Publication number Publication date
BR7206373D0 (pt) 1973-08-23
ES406763A1 (es) 1975-10-01
LU66054A1 (fr) 1973-03-12
DE2244894A1 (de) 1973-03-22
FR2152486A1 (fr) 1973-04-27
FR2152486B1 (fr) 1975-02-07
AR193434A1 (es) 1973-04-23
NL7212389A (fr) 1973-03-20
BE788631A (fr) 1973-03-12

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