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ES406763A1 - Improvements in devices for acoustic signaling through the use of a continuous current source. (Machine-translation by Google Translate, not legally binding) - Google Patents

Improvements in devices for acoustic signaling through the use of a continuous current source. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES406763A1
ES406763A1 ES406763A ES406763A ES406763A1 ES 406763 A1 ES406763 A1 ES 406763A1 ES 406763 A ES406763 A ES 406763A ES 406763 A ES406763 A ES 406763A ES 406763 A1 ES406763 A1 ES 406763A1
Authority
ES
Spain
Prior art keywords
devices
translation
machine
current source
legally binding
Prior art date
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
ES406763A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe dAppareillage Electrique SAPAREL SA
Original Assignee
Societe dAppareillage Electrique SAPAREL SA
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 Societe dAppareillage Electrique SAPAREL SA filed Critical Societe dAppareillage Electrique SAPAREL SA
Publication of ES406763A1 publication Critical patent/ES406763A1/en
Expired legal-status Critical Current

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)
  • Control Of Direct Current Motors (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Multiple Motors (AREA)
  • Relay Circuits (AREA)

Abstract

Improvements in devices for acoustic signaling by using a direct current source, characterized in that said devices comprise an astable multivibrator and transistors that controls, by means of a relay, the change of tone of an acoustic warning means. (Machine-translation by Google Translate, not legally binding)
ES406763A 1971-09-17 1972-09-16 Improvements in devices for acoustic signaling through the use of a continuous current source. (Machine-translation by Google Translate, not legally binding) Expired ES406763A1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES406763A1 true ES406763A1 (en) 1975-10-01

Family

ID=9083139

Family Applications (1)

Application Number Title Priority Date Filing Date
ES406763A Expired ES406763A1 (en) 1971-09-17 1972-09-16 Improvements in devices for acoustic signaling through the use of a continuous current source. (Machine-translation by Google Translate, not legally binding)

Country Status (9)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466813A1 (en) * 1979-09-28 1981-04-10 Legrand Sa Audible and visible electronic alarm circuit - has detector sensitive to impedance change to operate isolated circuits via relay contacts
GB2097256B (en) * 1981-04-02 1985-05-30 Morelle Jean V Compositions containing n-butyryl alphaaminoacids

Also Published As

Publication number Publication date
FR2152486B1 (en) 1975-02-07
BE788631A (en) 1973-03-12
FR2152486A1 (en) 1973-04-27
DE2244894A1 (en) 1973-03-22
NL7212389A (en) 1973-03-20
IT967481B (en) 1974-02-28
LU66054A1 (en) 1973-03-12
AR193434A1 (en) 1973-04-23
BR7206373D0 (en) 1973-08-23

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