GB1394148A - Push-button telphone subset - Google Patents

Push-button telphone subset

Info

Publication number
GB1394148A
GB1394148A GB4188173A GB4188173A GB1394148A GB 1394148 A GB1394148 A GB 1394148A GB 4188173 A GB4188173 A GB 4188173A GB 4188173 A GB4188173 A GB 4188173A GB 1394148 A GB1394148 A GB 1394148A
Authority
GB
United Kingdom
Prior art keywords
contact
diode
capacitor
impulsing
relay
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
GB4188173A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1394148A publication Critical patent/GB1394148A/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
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Telephonic Communication Services (AREA)
GB4188173A 1972-09-11 1973-09-06 Push-button telphone subset Expired GB1394148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPB038672 1972-09-11

Publications (1)

Publication Number Publication Date
GB1394148A true GB1394148A (en) 1975-05-14

Family

ID=3765315

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4188173A Expired GB1394148A (en) 1972-09-11 1973-09-06 Push-button telphone subset

Country Status (3)

Country Link
DE (1) DE2345508A1 (enExample)
FR (1) FR2199236B1 (enExample)
GB (1) GB1394148A (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1521468A (en) * 1974-10-11 1978-08-16 Standard Telephones Cables Ltd Circuit arrangement for telephone subset
FR2319256A1 (fr) * 1975-07-23 1977-02-18 Bailleul Roland Circuits electroniques et electromagnetiques permettant l'adaptation d'un clavier numerique a un poste telephonique a cadran d'appel par quatre fils
DE2536200C2 (de) * 1975-08-13 1983-04-21 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zur Überwachung einer Sprechader in Fernsprechapparaten
DE3801841A1 (de) * 1988-01-20 1989-08-03 Deutsche Telephonwerk Kabel Schaltungsanordnung fuer tastwahlbloecke in kommunikations-endgeraeten

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229154B (de) * 1965-04-30 1966-11-24 Maack Elmewe Schaltungsanordnung fuer Gebuehrenzaehler in Fernsprechteilnehmerstationen
DE2043611A1 (de) * 1970-09-03 1972-03-09 Tn Ladeschaltung für Kondensatoren am Ende einer, nur geringe Leistung über tragenden Leitung in Fernmeldeanlagen
BE788732A (fr) * 1971-09-13 1973-03-13 Int Standard Electric Corp Poste telephonique a clavier
CH537679A (de) * 1971-10-29 1973-05-31 Sodeco Compteurs De Geneve Einrichtung zum Speisen von Zusatzgeräten bei Telephonsprechstellen
BE794179A (nl) * 1972-01-21 1973-07-18 Itt Geintegreerde schakeling voor het kiezen van abonneenummers met druktoetsen

Also Published As

Publication number Publication date
FR2199236A1 (enExample) 1974-04-05
DE2345508A1 (de) 1974-03-28
FR2199236B1 (enExample) 1978-01-13

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee