GB556921A - Improvements in or relating to circuit arrangements for selector switches for use in automatic telephone or like systems - Google Patents

Improvements in or relating to circuit arrangements for selector switches for use in automatic telephone or like systems

Info

Publication number
GB556921A
GB556921A GB5218/42A GB521842A GB556921A GB 556921 A GB556921 A GB 556921A GB 5218/42 A GB5218/42 A GB 5218/42A GB 521842 A GB521842 A GB 521842A GB 556921 A GB556921 A GB 556921A
Authority
GB
United Kingdom
Prior art keywords
systems
relating
automatic telephone
circuit arrangements
selector switches
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
GB5218/42A
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
Priority to GB5218/42A priority Critical patent/GB556921A/en
Priority to US478245A priority patent/US2402232A/en
Priority to CH251035D priority patent/CH251035A/en
Publication of GB556921A publication Critical patent/GB556921A/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)

Abstract

556,921. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and BAKER, G. T. April 20, 1942, No. 5218. Drawings to Specification. [Class 40 (iv)] The description is identical with a part of that in Specification 556,922. The claims relate to the feature that the movable springs corresponding to one or more outgoing groups are multipled together and connected to one circuit and those corresponding to one or more other groups are multipled together and connected to another circuit so that subsequent controls depend on the level selected. Specifications 549,047, 551,187, 556,919 and 556,920 also are referred to.
GB5218/42A 1942-04-20 1942-04-20 Improvements in or relating to circuit arrangements for selector switches for use in automatic telephone or like systems Expired GB556921A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5218/42A GB556921A (en) 1942-04-20 1942-04-20 Improvements in or relating to circuit arrangements for selector switches for use in automatic telephone or like systems
US478245A US2402232A (en) 1942-04-20 1943-03-06 Automatic telephone system
CH251035D CH251035A (en) 1942-04-20 1943-04-19 Circuit arrangement for a selector switch.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5218/42A GB556921A (en) 1942-04-20 1942-04-20 Improvements in or relating to circuit arrangements for selector switches for use in automatic telephone or like systems
GB251035X 1942-04-20

Publications (1)

Publication Number Publication Date
GB556921A true GB556921A (en) 1943-10-27

Family

ID=26239733

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5218/42A Expired GB556921A (en) 1942-04-20 1942-04-20 Improvements in or relating to circuit arrangements for selector switches for use in automatic telephone or like systems

Country Status (1)

Country Link
GB (1) GB556921A (en)

Similar Documents

Publication Publication Date Title
GB840922A (en) Time division multiplex telephone system
GB737890A (en) Improvements in or relating to automatic telecommunication exchange
GB560807A (en) Improvements in telephone or like systems
GB556921A (en) Improvements in or relating to circuit arrangements for selector switches for use in automatic telephone or like systems
GB513409A (en) Improvements in or relating to electrical signalling systems
GB836558A (en) Improvements in or relating to automatic telephone systems
GB788595A (en) Improvements in or relating to automatic telecommunication exchange systems
GB556920A (en) Improvements in or relating to selector operating circuits for use in automatic telephone or like systems
GB756419A (en) Improvements in or relating to electrical switching circuits
GB556928A (en) Improvements in or relating to automatic or semi-automatic telephone systems
GB556927A (en) Improvements in or relating to the construction of selector switches as used in automtic telephone and like systems
GB788593A (en) Improvements in or relating to automatic telecommunication exchange systems
GB470008A (en) Improvements in electric signalling or impulse transmitting mechanism
GB556929A (en) Improvements in or relating to automatic or semi-automatic telephone systems
GB556918A (en) Improvements in or relating to the arrangement of switches in automatic telephone exchanges
CH233692A (en) Circuit arrangement in telecommunication systems, in particular telephone systems.
CH315053A (en) Circuit arrangement in telecommunication systems, in particular telephone systems
GB575312A (en) Improvements in or relating to telephone systems
GB556919A (en) Improvements in or relating to the construction of selector switches as used in automatic telephone and like systems
AU433140A (en) Improvements in or relating to selector switches such asare used in automatic telephone systems
GB813339A (en) Improvements in or relating to electrical signalling systems
AU992543A (en) Telephone otr similar systems for establishing connections with switching arrangement, comprising one or more stages with group selector switches
AU118987B2 (en) Selector switch for telecommunication systems
GB738308A (en) Improvements in or relating to electrical key switching equipment
CA492958A (en) Automatic switches of the type used in telephone systems