GB485117A - Improvements in or relating to prepayment apparatus for telephone systems - Google Patents

Improvements in or relating to prepayment apparatus for telephone systems

Info

Publication number
GB485117A
GB485117A GB31297/36A GB3129736A GB485117A GB 485117 A GB485117 A GB 485117A GB 31297/36 A GB31297/36 A GB 31297/36A GB 3129736 A GB3129736 A GB 3129736A GB 485117 A GB485117 A GB 485117A
Authority
GB
United Kingdom
Prior art keywords
arm
coin
contacts
coins
contact
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
GB31297/36A
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.)
HERMAN ENGEL
Original Assignee
HERMAN ENGEL
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 HERMAN ENGEL filed Critical HERMAN ENGEL
Publication of GB485117A publication Critical patent/GB485117A/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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F5/00—Coin-actuated mechanisms; Interlocks
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Prepayment Telephone Systems (AREA)
GB31297/36A 1935-11-16 1936-11-16 Improvements in or relating to prepayment apparatus for telephone systems Expired GB485117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH485117X 1935-11-16

Publications (1)

Publication Number Publication Date
GB485117A true GB485117A (en) 1938-05-16

Family

ID=4516424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31297/36A Expired GB485117A (en) 1935-11-16 1936-11-16 Improvements in or relating to prepayment apparatus for telephone systems

Country Status (5)

Country Link
CH (1) CH186683A (enrdf_load_stackoverflow)
DE (1) DE665859C (enrdf_load_stackoverflow)
FR (1) FR813539A (enrdf_load_stackoverflow)
GB (1) GB485117A (enrdf_load_stackoverflow)
NL (1) NL44301C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE857216C (de) * 1942-12-07 1952-11-27 Siemens Ag Schaltungsanordnung in Fernsprechanlagen mit Muenzkassierern fuer Netzgruppenverkehr

Also Published As

Publication number Publication date
NL44301C (enrdf_load_stackoverflow)
DE665859C (de) 1938-10-07
CH186683A (de) 1936-09-30
FR813539A (fr) 1937-06-03

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