FR1406586A - Dispositif téléphonique à sécurité dite intrinsèque - Google Patents

Dispositif téléphonique à sécurité dite intrinsèque

Info

Publication number
FR1406586A
FR1406586A FR977577A FR977577A FR1406586A FR 1406586 A FR1406586 A FR 1406586A FR 977577 A FR977577 A FR 977577A FR 977577 A FR977577 A FR 977577A FR 1406586 A FR1406586 A FR 1406586A
Authority
FR
France
Prior art keywords
telephone device
intrinsically safe
safe telephone
intrinsically
telephone
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
FR977577A
Other languages
English (en)
Inventor
Michel Louis Oules
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 dElectronique et dAutomatisme SA
Original Assignee
Societe dElectronique et dAutomatisme 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 dElectronique et dAutomatisme SA filed Critical Societe dElectronique et dAutomatisme SA
Priority to FR977577A priority Critical patent/FR1406586A/fr
Priority to BE663704A priority patent/BE663704A/xx
Priority to GB2170665A priority patent/GB1041329A/en
Priority to NL6507181A priority patent/NL6507181A/xx
Priority to DE19651462204 priority patent/DE1462204B2/de
Application granted granted Critical
Publication of FR1406586A publication Critical patent/FR1406586A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/12—Calling substations, e.g. by ringing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
    • 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

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR977577A 1964-06-09 1964-06-09 Dispositif téléphonique à sécurité dite intrinsèque Expired FR1406586A (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR977577A FR1406586A (fr) 1964-06-09 1964-06-09 Dispositif téléphonique à sécurité dite intrinsèque
BE663704A BE663704A (fr) 1964-06-09 1965-05-10
GB2170665A GB1041329A (en) 1964-06-09 1965-05-21 An intrinsic safety telephone device
NL6507181A NL6507181A (fr) 1964-06-09 1965-06-04
DE19651462204 DE1462204B2 (de) 1964-06-09 1965-06-05 Explosionsgeschutztes Fernsprechgerat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR977577A FR1406586A (fr) 1964-06-09 1964-06-09 Dispositif téléphonique à sécurité dite intrinsèque

Publications (1)

Publication Number Publication Date
FR1406586A true FR1406586A (fr) 1965-07-23

Family

ID=8831945

Family Applications (1)

Application Number Title Priority Date Filing Date
FR977577A Expired FR1406586A (fr) 1964-06-09 1964-06-09 Dispositif téléphonique à sécurité dite intrinsèque

Country Status (5)

Country Link
BE (1) BE663704A (fr)
DE (1) DE1462204B2 (fr)
FR (1) FR1406586A (fr)
GB (1) GB1041329A (fr)
NL (1) NL6507181A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214127A (en) * 1977-05-18 1980-07-22 S.I.L.E.C.-Division Signalisation Industrielle Intrinsically safe telephone network

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064366A (en) * 1976-01-15 1977-12-20 Winster Engineering Group Limited Intrinsically safe telephone systems
DE3324690C1 (de) * 1983-07-08 1984-10-11 Geobra Brandstätter GmbH & Co KG, 8502 Zirndorf Telefonanlage, insbesondere als Kinderspielzeug
DE3341251A1 (de) * 1983-11-15 1985-05-30 Geobra Brandstätter GmbH & Co KG, 8502 Zirndorf Telefonanlage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214127A (en) * 1977-05-18 1980-07-22 S.I.L.E.C.-Division Signalisation Industrielle Intrinsically safe telephone network

Also Published As

Publication number Publication date
BE663704A (fr) 1965-09-01
DE1462204B2 (de) 1971-02-11
NL6507181A (fr) 1965-12-10
GB1041329A (en) 1966-09-07
DE1462204A1 (de) 1968-11-21

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