GB396626A - Improvements in or relating to dial switches for use in telephone systems - Google Patents

Improvements in or relating to dial switches for use in telephone systems

Info

Publication number
GB396626A
GB396626A GB1557/33A GB155733A GB396626A GB 396626 A GB396626 A GB 396626A GB 1557/33 A GB1557/33 A GB 1557/33A GB 155733 A GB155733 A GB 155733A GB 396626 A GB396626 A GB 396626A
Authority
GB
United Kingdom
Prior art keywords
wheel
contacts
digits
digit
moves
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
GB1557/33A
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 GB396626A publication Critical patent/GB396626A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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 Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
GB1557/33A 1932-03-04 1933-01-17 Improvements in or relating to dial switches for use in telephone systems Expired GB396626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE396626X 1932-03-04

Publications (1)

Publication Number Publication Date
GB396626A true GB396626A (en) 1933-08-10

Family

ID=6397071

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1557/33A Expired GB396626A (en) 1932-03-04 1933-01-17 Improvements in or relating to dial switches for use in telephone systems

Country Status (2)

Country Link
GB (1) GB396626A (enrdf_load_stackoverflow)
NL (1) NL34119C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774823A (en) * 1951-12-21 1956-12-18 Maynez Pedro Salinas Selective electrical dialing system

Also Published As

Publication number Publication date
NL34119C (enrdf_load_stackoverflow)

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