GB263080A - Improvements in automatic telephone systems - Google Patents

Improvements in automatic telephone systems

Info

Publication number
GB263080A
GB263080A GB12730/26A GB1273026A GB263080A GB 263080 A GB263080 A GB 263080A GB 12730/26 A GB12730/26 A GB 12730/26A GB 1273026 A GB1273026 A GB 1273026A GB 263080 A GB263080 A GB 263080A
Authority
GB
United Kingdom
Prior art keywords
relay
test multiple
metering
line
produces
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
GB12730/26A
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 GB263080A publication Critical patent/GB263080A/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)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

263,080. Deutsche Telephonwerke und Kabelindustrie Akt.-Ces. Dec. 17, 1925, [Convention date]. Automatic and senzi-automatic exchange systems. -In a system employing line switches of the kind described in Specification 263,079, in which the line relay LR remains operated during conversation and guard potential is supplied to the test multiple over a front contact of the switching relay P, metering is effected, upon the reply of the called party, by means of relays SR, ZR in the group selector which connect battery to the test multiple to energize a differential metering relay H in the line switch. The opposed windings of this relay are of the same resistance, but one has more turns than the other, so that, while a weak current produces a differential effect, a strong current, which might be connected momentarily to the test multiple over the magnet D<1> of another line switch, causes saturation of the core and produces no effect.
GB12730/26A 1925-12-17 1926-05-18 Improvements in automatic telephone systems Expired GB263080A (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
GB263080A true GB263080A (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 After (1)

Application Number Title Priority Date Filing Date
GB12729/26A Expired GB263079A (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
GB263079A (en) 1927-02-24

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