GB307040A - Circuit arrangement for telephone installations - Google Patents

Circuit arrangement for telephone installations

Info

Publication number
GB307040A
GB307040A GB19065/28A GB1906528A GB307040A GB 307040 A GB307040 A GB 307040A GB 19065/28 A GB19065/28 A GB 19065/28A GB 1906528 A GB1906528 A GB 1906528A GB 307040 A GB307040 A GB 307040A
Authority
GB
United Kingdom
Prior art keywords
relay
automatic
exchange
semi
release
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
GB19065/28A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB307040A publication Critical patent/GB307040A/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)
  • Exchange Systems With Centralized Control (AREA)

Abstract

307,040. Siemens & Malske Akt.-Ges. March 3, 1928, [Convention date]. Semi - automatic exchange systems; timecontrolling systems.-Thermal relays are employed to release a connection if neither subscriber gives a clearing signal within a gven time. The invention is described with reference to a system substantially identical with that described in Specification 302,140, comprising a number of small automatic exchanges associated with a central exchange at which the establishment of all connections within the system is controlled by a semi-automatic operator, the apparatus in each automatic exchange comprising finder-connector links AS1-LW1 and hunting switches AW1 which associate with links with the central exchange. When a called subscriber replies, the withdrawal of the plug at the central exchange causes the release of relay K which connects up a thermal relay Th1. This, on operating, connects up a further thermal relay Th2 so that after a prescribed interval relay V2 operates and releases the connection in the manner described in the above-mentioned Specification.
GB19065/28A 1928-03-03 1928-06-30 Circuit arrangement for telephone installations Expired GB307040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE307040X 1928-03-03

Publications (1)

Publication Number Publication Date
GB307040A true GB307040A (en) 1929-09-30

Family

ID=6121313

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19065/28A Expired GB307040A (en) 1928-03-03 1928-06-30 Circuit arrangement for telephone installations

Country Status (2)

Country Link
FR (1) FR665355A (en)
GB (1) GB307040A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6252690B1 (en) * 1992-10-08 2001-06-26 Alcatel Espace Satellite onboard data transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6252690B1 (en) * 1992-10-08 2001-06-26 Alcatel Espace Satellite onboard data transmission system

Also Published As

Publication number Publication date
FR665355A (en) 1929-09-18

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