GB401586A - Improvements in or relating to impulse transmitters for use in telephone systems - Google Patents

Improvements in or relating to impulse transmitters for use in telephone systems

Info

Publication number
GB401586A
GB401586A GB10859/33A GB1085933A GB401586A GB 401586 A GB401586 A GB 401586A GB 10859/33 A GB10859/33 A GB 10859/33A GB 1085933 A GB1085933 A GB 1085933A GB 401586 A GB401586 A GB 401586A
Authority
GB
United Kingdom
Prior art keywords
digit
discs
disc
dial
cams
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
GB10859/33A
Other languages
English (en)
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.)
Telephon Apparat Fabrik E Zwietusch and Co
Original Assignee
Telephon Apparat Fabrik E Zwietusch and Co
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 Telephon Apparat Fabrik E Zwietusch and Co filed Critical Telephon Apparat Fabrik E Zwietusch and Co
Publication of GB401586A publication Critical patent/GB401586A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
GB10859/33A 1932-05-17 1933-04-11 Improvements in or relating to impulse transmitters for use in telephone systems Expired GB401586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE401586X 1932-05-17

Publications (1)

Publication Number Publication Date
GB401586A true GB401586A (en) 1933-11-16

Family

ID=6406612

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10859/33A Expired GB401586A (en) 1932-05-17 1933-04-11 Improvements in or relating to impulse transmitters for use in telephone systems

Country Status (4)

Country Link
BE (1) BE395872A (enrdf_load_stackoverflow)
FR (1) FR754355A (enrdf_load_stackoverflow)
GB (1) GB401586A (enrdf_load_stackoverflow)
NL (1) NL34344C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511939A (en) * 1967-03-20 1970-05-12 Tamura Electric Works Ltd Local-call pay telephone arranged for key-enabled toll calls

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511939A (en) * 1967-03-20 1970-05-12 Tamura Electric Works Ltd Local-call pay telephone arranged for key-enabled toll calls

Also Published As

Publication number Publication date
NL34344C (enrdf_load_stackoverflow)
FR754355A (enrdf_load_stackoverflow) 1933-11-03
BE395872A (enrdf_load_stackoverflow)

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