FR706846A - Safety device for automatic telephone apparatus - Google Patents

Safety device for automatic telephone apparatus

Info

Publication number
FR706846A
FR706846A FR706846DA FR706846A FR 706846 A FR706846 A FR 706846A FR 706846D A FR706846D A FR 706846DA FR 706846 A FR706846 A FR 706846A
Authority
FR
France
Prior art keywords
safety device
telephone apparatus
automatic telephone
automatic
safety
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
Other languages
French (fr)
Inventor
Arsene Steurs
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
Application granted granted Critical
Publication of FR706846A publication Critical patent/FR706846A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H04M17/026—Constructional features

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)
FR706846D 1929-12-09 1930-12-02 Safety device for automatic telephone apparatus Expired FR706846A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE374822X 1929-12-09

Publications (1)

Publication Number Publication Date
FR706846A true FR706846A (en) 1931-06-30

Family

ID=3868622

Family Applications (1)

Application Number Title Priority Date Filing Date
FR706846D Expired FR706846A (en) 1929-12-09 1930-12-02 Safety device for automatic telephone apparatus

Country Status (3)

Country Link
BE (1) BE366093A (en)
FR (1) FR706846A (en)
GB (1) GB374822A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365554A (en) * 1964-10-16 1968-01-23 Bell Telephone Labor Inc Prevention of dialing by a telephone switchhook

Also Published As

Publication number Publication date
GB374822A (en) 1932-06-16
BE366093A (en)

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