GB487441A - Improvements in or relating to teleprinter exchange systems - Google Patents

Improvements in or relating to teleprinter exchange systems

Info

Publication number
GB487441A
GB487441A GB6661/37A GB666137A GB487441A GB 487441 A GB487441 A GB 487441A GB 6661/37 A GB6661/37 A GB 6661/37A GB 666137 A GB666137 A GB 666137A GB 487441 A GB487441 A GB 487441A
Authority
GB
United Kingdom
Prior art keywords
relay
release
winding
releases
line
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
GB6661/37A
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
Priority to DES120127D priority Critical patent/DE655252C/en
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to GB6661/37A priority patent/GB487441A/en
Priority to FR818962D priority patent/FR818962A/en
Publication of GB487441A publication Critical patent/GB487441A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

487,441. Telegraph exchange systems. TOWLER, E. E. (Siemens & Halske Akt.-Ges.) March 6, 1937, No. 6661. [Class 40 (iii)] A subscriber's line is provided with means in the line or preselector circuit for forcing release on the receipt of a release signal from a called line, even if the calling loop remains closed. In the system shown, relay R(i) operates over the loop on a call being made and closes an interrupter circuit for the preselector magnet D. On the operation of test relay T, relay U operates and locks dependent on relay R, and battery sent back over the b-wire energizes relay L which connects repeating relay B across the loop. Relay R remains operated over winding (i) and if the calling party sends the release signal, winding (ii) of R is operated by the release of B so that R releases releasing T and restoring the preselector to normal. If the called party sends a release signal, relay L releases closing a short-circuit for winding (i) of R and disconnecting winding (ii) so that R releases irrespective of the condition of the calling loop and releases relay T and the connection. In a modification, for a four-wire toll-subscriber's line, the release of relay L with U energized when the called party releases reverses the battery connection to one winding of relay R to effect its release.
GB6661/37A 1935-10-16 1937-03-06 Improvements in or relating to teleprinter exchange systems Expired GB487441A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DES120127D DE655252C (en) 1935-10-16 1935-10-16 Circuit arrangement for self-connection telex switching systems with triggering possibility by both participants and prevention of unauthorized maintenance of connections by the calling participant
GB6661/37A GB487441A (en) 1935-10-16 1937-03-06 Improvements in or relating to teleprinter exchange systems
FR818962D FR818962A (en) 1935-10-16 1937-03-09 Automatic exchange control system for establishing teleprinter communications

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DES120127D DE655252C (en) 1935-10-16 1935-10-16 Circuit arrangement for self-connection telex switching systems with triggering possibility by both participants and prevention of unauthorized maintenance of connections by the calling participant
GB6661/37A GB487441A (en) 1935-10-16 1937-03-06 Improvements in or relating to teleprinter exchange systems
FR818962T 1937-03-09

Publications (1)

Publication Number Publication Date
GB487441A true GB487441A (en) 1938-06-21

Family

ID=9818489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6661/37A Expired GB487441A (en) 1935-10-16 1937-03-06 Improvements in or relating to teleprinter exchange systems

Country Status (3)

Country Link
DE (1) DE655252C (en)
FR (1) FR818962A (en)
GB (1) GB487441A (en)

Also Published As

Publication number Publication date
FR818962A (en) 1937-10-08
DE655252C (en) 1938-01-12

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