GB256544A - Improvements in telephone exchange systems - Google Patents

Improvements in telephone exchange systems

Info

Publication number
GB256544A
GB256544A GB1211026A GB1211026A GB256544A GB 256544 A GB256544 A GB 256544A GB 1211026 A GB1211026 A GB 1211026A GB 1211026 A GB1211026 A GB 1211026A GB 256544 A GB256544 A GB 256544A
Authority
GB
United Kingdom
Prior art keywords
relay
digit
chain
energized
relays
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
GB1211026A
Other languages
English (en)
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.)
Individual
Original Assignee
Individual
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 NL256544D priority Critical patent/NL256544A/xx
Application filed by Individual filed Critical Individual
Priority to GB1211026A priority patent/GB256544A/en
Priority to GB858925A priority patent/GB257307A/en
Priority to FR613686D priority patent/FR613686A/fr
Publication of GB256544A publication Critical patent/GB256544A/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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/44—Refractory linings

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB1211026A 1925-03-31 1925-03-31 Improvements in telephone exchange systems Expired GB256544A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL256544D NL256544A (instruction) 1925-03-31
GB1211026A GB256544A (en) 1925-03-31 1925-03-31 Improvements in telephone exchange systems
GB858925A GB257307A (en) 1925-03-31 1925-03-31 Improvements in telephone exchange systems
FR613686D FR613686A (fr) 1925-03-31 1926-03-30 Perfectionnements apportés aux systèmes utilisés dans les bureaux centraux téléphoniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1211026A GB256544A (en) 1925-03-31 1925-03-31 Improvements in telephone exchange systems

Publications (1)

Publication Number Publication Date
GB256544A true GB256544A (en) 1926-08-03

Family

ID=9998553

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1211026A Expired GB256544A (en) 1925-03-31 1925-03-31 Improvements in telephone exchange systems
GB858925A Expired GB257307A (en) 1925-03-31 1925-03-31 Improvements in telephone exchange systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB858925A Expired GB257307A (en) 1925-03-31 1925-03-31 Improvements in telephone exchange systems

Country Status (3)

Country Link
FR (1) FR613686A (instruction)
GB (2) GB256544A (instruction)
NL (1) NL256544A (instruction)

Also Published As

Publication number Publication date
NL256544A (instruction)
FR613686A (fr) 1926-11-26
GB257307A (en) 1926-08-31

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