GB655683A - Improvements in automatic telephone or telegraph exchange systems - Google Patents

Improvements in automatic telephone or telegraph exchange systems

Info

Publication number
GB655683A
GB655683A GB34971/47A GB3497147A GB655683A GB 655683 A GB655683 A GB 655683A GB 34971/47 A GB34971/47 A GB 34971/47A GB 3497147 A GB3497147 A GB 3497147A GB 655683 A GB655683 A GB 655683A
Authority
GB
United Kingdom
Prior art keywords
relay
selector
busy
wire
potential
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
GB34971/47A
Other languages
English (en)
Inventor
Roelof Maarten Marie Oberman
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.)
Nederlanden Staat
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Publication of GB655683A publication Critical patent/GB655683A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB34971/47A 1946-03-26 1947-12-31 Improvements in automatic telephone or telegraph exchange systems Expired GB655683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL655683X 1946-03-26

Publications (1)

Publication Number Publication Date
GB655683A true GB655683A (en) 1951-08-01

Family

ID=19795223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34971/47A Expired GB655683A (en) 1946-03-26 1947-12-31 Improvements in automatic telephone or telegraph exchange systems

Country Status (3)

Country Link
FR (1) FR959153A (cg-RX-API-DMAC10.html)
GB (1) GB655683A (cg-RX-API-DMAC10.html)
NL (1) NL63841C (cg-RX-API-DMAC10.html)

Also Published As

Publication number Publication date
FR959153A (cg-RX-API-DMAC10.html) 1950-03-25
NL63841C (cg-RX-API-DMAC10.html)

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