US1638331A - Multioffice telephone system - Google Patents

Multioffice telephone system Download PDF

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Publication number
US1638331A
US1638331A US608741A US60874122A US1638331A US 1638331 A US1638331 A US 1638331A US 608741 A US608741 A US 608741A US 60874122 A US60874122 A US 60874122A US 1638331 A US1638331 A US 1638331A
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US
United States
Prior art keywords
telephone system
gardner
sheets
sheet
filed dec
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 - Lifetime
Application number
US608741A
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English (en)
Inventor
John E Gardner
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.)
Automatic Electric Inc
Original Assignee
Automatic Electric Inc
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 Automatic Electric Inc filed Critical Automatic Electric Inc
Priority to US608741A priority Critical patent/US1638331A/en
Priority to GB19840/24A priority patent/GB220955A/en
Priority to GB27066/23A priority patent/GB209040A/en
Application granted granted Critical
Publication of US1638331A publication Critical patent/US1638331A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Definitions

  • the present invention relates in general to multi-oflice telephone systems of the automatic type, and the broad general object of the invention is the provision of novel and improved trunking arrangements for a system of this character whereby the inter-oflice griunking facilities are rendered more flexie e.
  • the present invention comprehends a new and improved director of simplified construction for increasing the efficiency and flexibility of the inter-oflice trunking in automatic multi-office systems using step by stem switches of the Strowger type. It is well known that in multi-oflice systems of this type the designation of the ofiice or the ofiice name bears a definite relation to the geographical districts.
  • the invention allows the names or the numbers of ofiic'es in a multi-ofiice system to be assigned without regard to their geographical districts. That is. in a multi-ofiice system comprising a number of districts, oflices having conflictin names ma be located in difierent districts, if desired, instead of it being necessary to locate them in the same geographical district, as is the usual practice.
  • the invention also provides means for routing calls thru a plurality of ofiices in series, which may or may not have any relation to the numerical designation of the desired exin order to increase the efficiency of the inter-office trunk groups. This arrangement is commonly called tandem trunking.
  • Another feature of the invention provides means for eliminating certain .switches in the connection when it is not necessary for the call to be extended through a plurality of exchanges.
  • Another feature of the invention provides means for releasing the director after the office code has been set up provided the controlling impulses of the director catch up -with the dialing operations of the calling subscriber.
  • This arrangement allows the director to be released and to revert to common' use.
  • the number of digits in subscribers numbers do not have to be uniform, and yet the same number of register switches sufiice in all cases.
  • a further feature of the invention relates to an arrangement of controlling circuits so that the registering switches of the director may be used over and over again, thus lessening the number of register switches necessary for registering subscribers directory numbers.
  • Fig. 1 is a map of

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Meter Arrangements (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)
US608741A 1922-12-23 1922-12-23 Multioffice telephone system Expired - Lifetime US1638331A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US608741A US1638331A (en) 1922-12-23 1922-12-23 Multioffice telephone system
GB19840/24A GB220955A (enrdf_load_stackoverflow) 1922-12-23 1923-10-29
GB27066/23A GB209040A (en) 1922-12-23 1923-10-29 Improvements in or relating to telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US608741A US1638331A (en) 1922-12-23 1922-12-23 Multioffice telephone system

Publications (1)

Publication Number Publication Date
US1638331A true US1638331A (en) 1927-08-09

Family

ID=24437783

Family Applications (1)

Application Number Title Priority Date Filing Date
US608741A Expired - Lifetime US1638331A (en) 1922-12-23 1922-12-23 Multioffice telephone system

Country Status (2)

Country Link
US (1) US1638331A (enrdf_load_stackoverflow)
GB (2) GB220955A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554115A (en) * 1947-12-08 1951-05-22 Automatic Elect Lab Automatic director telephone system
US2631195A (en) * 1949-01-29 1953-03-10 Automatic Elect Lab Toll switching system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554115A (en) * 1947-12-08 1951-05-22 Automatic Elect Lab Automatic director telephone system
US2631195A (en) * 1949-01-29 1953-03-10 Automatic Elect Lab Toll switching system

Also Published As

Publication number Publication date
GB209040A (en) 1925-01-29
GB220955A (enrdf_load_stackoverflow) 1925-03-02

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