GB263079A - Improvements in automatic telephone systems - Google Patents

Improvements in automatic telephone systems

Info

Publication number
GB263079A
GB263079A GB12729/26A GB1272926A GB263079A GB 263079 A GB263079 A GB 263079A GB 12729/26 A GB12729/26 A GB 12729/26A GB 1272926 A GB1272926 A GB 1272926A GB 263079 A GB263079 A GB 263079A
Authority
GB
United Kingdom
Prior art keywords
line relay
relay
switch
line
automatic
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
GB12729/26A
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.)
Deutsche Telephonwerke und Kabelindustrie AG
Original Assignee
Deutsche Telephonwerke und Kabelindustrie 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
Priority claimed from DED49458D external-priority patent/DE464095C/en
Application filed by Deutsche Telephonwerke und Kabelindustrie AG filed Critical Deutsche Telephonwerke und Kabelindustrie AG
Publication of GB263079A publication Critical patent/GB263079A/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)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

263,079. Deutsche Telephonwerke und Kabelindustrie Akt.-Ges. Dec. 17, 1925, [Convention date]. Automatic and semi-automatic exchange systems.-The slow-acting line relay LR of a line switch having a normal position remains energized during conversation in the feed circuit irom the succeeding selector, and controls the release of the switch. Guard potential is supplied to the test multiple over a front contact of the switching relay P, which is connected to the magnet D and the test wiper III in the usual manner, and is held in a local circuit under control of the line relay. The line relay may be shunted by a condenser to improve impulsing, or may have a short-circuited winding.
GB12729/26A 1925-12-17 1926-05-18 Improvements in automatic telephone systems Expired GB263079A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE263080X 1925-12-17
DE263079X 1925-12-17
DED49458D DE464095C (en) 1925-12-17 1925-12-18 Circuit arrangement for preselector

Publications (1)

Publication Number Publication Date
GB263079A true GB263079A (en) 1927-02-24

Family

ID=27186903

Family Applications (2)

Application Number Title Priority Date Filing Date
GB12730/26A Expired GB263080A (en) 1925-12-17 1926-05-18 Improvements in automatic telephone systems
GB12729/26A Expired GB263079A (en) 1925-12-17 1926-05-18 Improvements in automatic telephone systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB12730/26A Expired GB263080A (en) 1925-12-17 1926-05-18 Improvements in automatic telephone systems

Country Status (1)

Country Link
GB (2) GB263080A (en)

Also Published As

Publication number Publication date
GB263080A (en) 1927-02-24

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