GB687763A - Improvements in circuit-arrangements for use in automatic signalling systems for engaging a common device - Google Patents

Improvements in circuit-arrangements for use in automatic signalling systems for engaging a common device

Info

Publication number
GB687763A
GB687763A GB10394/51A GB1039451A GB687763A GB 687763 A GB687763 A GB 687763A GB 10394/51 A GB10394/51 A GB 10394/51A GB 1039451 A GB1039451 A GB 1039451A GB 687763 A GB687763 A GB 687763A
Authority
GB
United Kingdom
Prior art keywords
circuit
relay
allotting
finders
primary
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
GB10394/51A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB687763A publication Critical patent/GB687763A/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)
  • Safety Devices In Control Systems (AREA)

Abstract

687,763. Automatic exchange systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 3, 1951 [May 6, 1950], No. 10394/51. Class 40 (iv). A relay chain circuit KS1 for allotting finders or other common apparatus is provided with a differential relay Y having one winding in series with the chain circuit so that it is operated by a start potential only if the circuit is incomplete. As shown, two groups of subscribers are served by two groups of primary finders, each acting as a reserve for the other, with allotting circuits KS1, KS2 and differential relays Y, Z. In normal operation, a start potential energizes relay IB of the allotted primary finder. This relay connects up the rotary magnet D and remains locked until the primary finder is found by a secondary finder. When the calling line is found, T energizes and operates switching relay IG which extends the allotting circuit. If all finders of a group are busy, or if the allotting circuit is faulty, the operation of Y or Z extends a start potential to the allotting circuit of the other group, and in the latter case makes a circuit for an alarm relay AL, this circuit being opened in the former case by the relays T of the busy finders.
GB10394/51A 1950-05-06 1951-05-03 Improvements in circuit-arrangements for use in automatic signalling systems for engaging a common device Expired GB687763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL291950X 1950-05-06

Publications (1)

Publication Number Publication Date
GB687763A true GB687763A (en) 1953-02-18

Family

ID=19782800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10394/51A Expired GB687763A (en) 1950-05-06 1951-05-03 Improvements in circuit-arrangements for use in automatic signalling systems for engaging a common device

Country Status (6)

Country Link
BE (1) BE503029A (en)
CH (1) CH291950A (en)
DE (1) DE881368C (en)
FR (1) FR1041757A (en)
GB (1) GB687763A (en)
NL (1) NL153379B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE752822C (en) * 1940-04-30 1953-02-09 Bamag Meguin A G Conversion of the nitrogen oxide gases remaining in the residual gases during the aqueous or acidic absorption of nitrogen oxides into calcium nitrate using milk of lime

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047861B (en) * 1957-06-29 1958-12-31 Telefonbau & Normalzeit Gmbh Chain connection for telecommunications systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE752822C (en) * 1940-04-30 1953-02-09 Bamag Meguin A G Conversion of the nitrogen oxide gases remaining in the residual gases during the aqueous or acidic absorption of nitrogen oxides into calcium nitrate using milk of lime

Also Published As

Publication number Publication date
DE881368C (en) 1953-06-29
NL153379B (en)
CH291950A (en) 1953-07-15
BE503029A (en)
FR1041757A (en) 1953-10-27

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