GB1290723A - - Google Patents

Info

Publication number
GB1290723A
GB1290723A GB4856169A GB1290723DA GB1290723A GB 1290723 A GB1290723 A GB 1290723A GB 4856169 A GB4856169 A GB 4856169A GB 1290723D A GB1290723D A GB 1290723DA GB 1290723 A GB1290723 A GB 1290723A
Authority
GB
United Kingdom
Prior art keywords
relays
digit
final selector
exchange
pairs
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
GB4856169A
Other languages
English (en)
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
Publication of GB1290723A publication Critical patent/GB1290723A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB4856169A 1969-10-02 1969-10-20 Expired GB1290723A (US07879113-20110201-C00004.png)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4856169 1969-10-02

Publications (1)

Publication Number Publication Date
GB1290723A true GB1290723A (US07879113-20110201-C00004.png) 1972-09-27

Family

ID=10449050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4856169A Expired GB1290723A (US07879113-20110201-C00004.png) 1969-10-02 1969-10-20

Country Status (3)

Country Link
US (1) US3697704A (US07879113-20110201-C00004.png)
GB (1) GB1290723A (US07879113-20110201-C00004.png)
ZA (1) ZA706652B (US07879113-20110201-C00004.png)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250531A (en) * 1979-08-30 1981-02-10 Ahrens Walter C Switch-arc preventing circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE633291A (US07879113-20110201-C00004.png) * 1962-03-01
DE1179608B (de) * 1963-04-23 1964-10-15 Siemens Ag Schaltungsanordnung zur UEbertragung von Zeichen ueber mehradrige Fernmeldeleitungen, insbesondere fuer Fernsprechanlagen
AT245055B (de) * 1964-11-04 1966-02-10 Standard Telephon & Telegraph Schaltungsanordnung zum Wählen eines Gesprächspartners mittels Wähltasten
DE1487832A1 (de) * 1966-07-07 1969-02-13 Merk Gmbh Telefonbau Fried Schaltungsanordnung zur Auswertung von Tastenwahlkennzeichen

Also Published As

Publication number Publication date
ZA706652B (en) 1971-09-29
US3697704A (en) 1972-10-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee