GB398970A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB398970A
GB398970A GB1714032A GB1714032A GB398970A GB 398970 A GB398970 A GB 398970A GB 1714032 A GB1714032 A GB 1714032A GB 1714032 A GB1714032 A GB 1714032A GB 398970 A GB398970 A GB 398970A
Authority
GB
United Kingdom
Prior art keywords
relay
operator
general electric
relating
subscriber
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
GB1714032A
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.)
VICTOR NORMAN HALLIDAY
General Electric Co PLC
Original Assignee
VICTOR NORMAN HALLIDAY
General Electric Co PLC
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 VICTOR NORMAN HALLIDAY, General Electric Co PLC filed Critical VICTOR NORMAN HALLIDAY
Priority to GB1714032A priority Critical patent/GB398970A/en
Publication of GB398970A publication Critical patent/GB398970A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

398,970. Automatic exchange systems. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and HALLIDAY, V. N., c/o General Electric Co., Stoke, Coventry. June 17, 1932, No. 17140. [Class 40 (iv).] In a system in which a connection to a manual position is held under the control of an operator by the energization of relay MG over the trunk when the subscriber hangs up, the operator is enabled to recall the subscriber by reversing the direction of the current key RB, which may be common to a number of cordcircuits, thereby energizing a polarized ringing relay RG in series or in parallel with relay MG. The control relays may be at the first or other selector or at a repeater, and the manual position may be at another exchange.
GB1714032A 1932-06-17 1932-06-17 Improvements in or relating to telephone systems Expired GB398970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1714032A GB398970A (en) 1932-06-17 1932-06-17 Improvements in or relating to telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1714032A GB398970A (en) 1932-06-17 1932-06-17 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB398970A true GB398970A (en) 1933-09-28

Family

ID=10089984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1714032A Expired GB398970A (en) 1932-06-17 1932-06-17 Improvements in or relating to telephone systems

Country Status (1)

Country Link
GB (1) GB398970A (en)

Similar Documents

Publication Publication Date Title
GB654096A (en) Telephone systems
GB398970A (en) Improvements in or relating to telephone systems
GB522457A (en) Improvements in or relating to systems of simultaneous telephony on a number of lines
US2338997A (en) Communication system
DE641064C (en) Circuit arrangement for private branch exchanges
US1799223A (en) Party-line message-register system
GB482014A (en) Improvements relating to telephone systems
GB363129A (en) Improvements in or relating to automatic or semi-automatic telephone systems
JPS55110489A (en) Night call out system in private automatic branch of exchange
US1851185A (en) Telephone system
GB554136A (en) Improvements in or relating to telephone systems
GB474653A (en) Improvements in or relating to telephone systems
GB418903A (en) Improvements in or relating to telephone or like systems
GB235064A (en) Improvements in or relating to telephone systems
GB409670A (en) Improvements in or relating to telegraph, telephone or like exchange systems
GB473015A (en) Improvements in or relating to telephone systems
GB346790A (en) Improvements in or relating to telephone systems
GB490137A (en) Circuit arrangement for the metering of different grades of connection in automatic telephone systems
GB360997A (en) Improvements in or relating to telephone systems
GB183438A (en) Improvements in or relating to telephone systems and apparatus for use therein
GB393376A (en) Improvements relating to automatic telephone systems
GB505192A (en) Improvements in and relating to telephone installations
GB1087785A (en) Improvements in and relating to manual telephone exchange systems
GB256992A (en) Improvements relating to telephone systems
GB382404A (en) Improvements in or relating to automatic telephone systems