GB560807A - Improvements in telephone or like systems - Google Patents

Improvements in telephone or like systems

Info

Publication number
GB560807A
GB560807A GB3044/44A GB304444A GB560807A GB 560807 A GB560807 A GB 560807A GB 3044/44 A GB3044/44 A GB 3044/44A GB 304444 A GB304444 A GB 304444A GB 560807 A GB560807 A GB 560807A
Authority
GB
United Kingdom
Prior art keywords
automatic
telephone
systems
signal
terroni
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
GB3044/44A
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 Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
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 Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Publication of GB560807A publication Critical patent/GB560807A/en
Expired legal-status Critical Current

Links

Classifications

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

560,807. Automatic and semi-automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., GILLINGS, C., BEALE, C. E., and TERRONI, T. B. D. Oct. 15, 1942, No. 3044/44. Divided out of 560,794. Drawings to Specification. [Class 40 (iv)] In a system of the kind described in Specification 559,016, in which numbers are sent over a junction in the form of voice-frequency code signals, the receipt at the incoming end of the preparatory signal preceding a code signal serves to block the talking circuit to prevent the latter signal reaching a later stage in the connection. The description is identical with that described in Specification 560,794,
GB3044/44A 1942-10-15 1942-10-15 Improvements in telephone or like systems Expired GB560807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14466/42A GB560794A (en) 1942-10-15 1942-10-15 Improvements in telephone or like systems

Publications (1)

Publication Number Publication Date
GB560807A true GB560807A (en) 1944-04-20

Family

ID=10041694

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3044/44A Expired GB560807A (en) 1942-10-15 1942-10-15 Improvements in telephone or like systems
GB14466/42A Expired GB560794A (en) 1942-10-15 1942-10-15 Improvements in telephone or like systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB14466/42A Expired GB560794A (en) 1942-10-15 1942-10-15 Improvements in telephone or like systems

Country Status (3)

Country Link
US (1) US2407150A (en)
FR (1) FR931977A (en)
GB (2) GB560807A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579530A (en) * 1947-04-29 1951-12-25 Int Standard Electric Corp Four-wire to two-wire connecting circuit

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594719A (en) * 1945-05-19 1952-04-29 Automatic Elect Lab Voice-frequency telephone signaling system
GB654639A (en) * 1947-02-07 1951-06-27 Standard Telephones Cables Ltd Improvements in or relating to electric signalling systems
BE482466A (en) * 1947-04-29
US2566009A (en) * 1947-12-12 1951-08-28 Automatic Elect Lab Interexchange switching telephone system
US2530815A (en) * 1949-02-02 1950-11-21 Automatic Elect Lab Mobile radiotelephone system having a single channel and a single frequency
BE514718A (en) * 1951-10-16
US2890282A (en) * 1953-01-30 1959-06-09 Gen Dynamics Corp Automatic telephone system
DE1021016B (en) * 1955-04-29 1957-12-19 Standard Elektrik Ag Circuit arrangement for telecommunication and telecontrol systems for signal transmission according to a frequency code system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579530A (en) * 1947-04-29 1951-12-25 Int Standard Electric Corp Four-wire to two-wire connecting circuit

Also Published As

Publication number Publication date
FR931977A (en) 1948-03-09
US2407150A (en) 1946-09-03
GB560794A (en) 1944-04-20

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