GB717740A - Improvements in or relating to telephone or like systems - Google Patents

Improvements in or relating to telephone or like systems

Info

Publication number
GB717740A
GB717740A GB562654A GB562654A GB717740A GB 717740 A GB717740 A GB 717740A GB 562654 A GB562654 A GB 562654A GB 562654 A GB562654 A GB 562654A GB 717740 A GB717740 A GB 717740A
Authority
GB
United Kingdom
Prior art keywords
july
response
description
systems
telephone
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
GB562654A
Inventor
George Thomas Baker
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.)
British Telecommunications PLC
British Telecommunications Research Ltd
Original Assignee
British Telecommunications PLC
British Telecommunications Research 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 British Telecommunications PLC, British Telecommunications Research Ltd filed Critical British Telecommunications PLC
Priority to GB562654A priority Critical patent/GB717740A/en
Publication of GB717740A publication Critical patent/GB717740A/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)

Abstract

717,740. Automatic exchange systems. BRITISH TELECOMMUNICATIONS RESEARCH, Ltd. July 10, 1952 [July 25, 1951], No. 5636/54. Divided out of 717,687. Drawings to Specification. Class 40 (4) Wanted subscribers' numbers are recorded on a magnetic drum in response to the operation of a keyset, the recording being effected, in code in response to the selective connection of potential over the contacts of the keys to a group of leads extending to the control equipment for the drum.. The description is included in the description of Specification 717,687 but the claims differ. Specifications 681,360 and 717,688 also are referred to.
GB562654A 1951-07-25 1951-07-25 Improvements in or relating to telephone or like systems Expired GB717740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB562654A GB717740A (en) 1951-07-25 1951-07-25 Improvements in or relating to telephone or like systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB562654A GB717740A (en) 1951-07-25 1951-07-25 Improvements in or relating to telephone or like systems

Publications (1)

Publication Number Publication Date
GB717740A true GB717740A (en) 1954-11-03

Family

ID=9799621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB562654A Expired GB717740A (en) 1951-07-25 1951-07-25 Improvements in or relating to telephone or like systems

Country Status (1)

Country Link
GB (1) GB717740A (en)

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