GB222502A - Improvements in telephone exchange systems - Google Patents

Improvements in telephone exchange systems

Info

Publication number
GB222502A
GB222502A GB22793/24A GB2279324A GB222502A GB 222502 A GB222502 A GB 222502A GB 22793/24 A GB22793/24 A GB 22793/24A GB 2279324 A GB2279324 A GB 2279324A GB 222502 A GB222502 A GB 222502A
Authority
GB
United Kingdom
Prior art keywords
relay
relays
energized
idle
impulse
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
GB22793/24A
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.)
WESTERN ELECTRIC CO Ltd
AT&T Inc
Original Assignee
WESTERN ELECTRIC CO Ltd
Western Electric Co Inc
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 WESTERN ELECTRIC CO Ltd, Western Electric Co Inc filed Critical WESTERN ELECTRIC CO Ltd
Publication of GB222502A publication Critical patent/GB222502A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB22793/24A 1923-09-26 1924-09-26 Improvements in telephone exchange systems Expired GB222502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US664825A US1550769A (en) 1923-09-26 1923-09-26 Telephone-exchange system

Publications (1)

Publication Number Publication Date
GB222502A true GB222502A (en) 1925-05-21

Family

ID=24667594

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22793/24A Expired GB222502A (en) 1923-09-26 1924-09-26 Improvements in telephone exchange systems

Country Status (3)

Country Link
US (1) US1550769A (enExample)
FR (1) FR587290A (enExample)
GB (1) GB222502A (enExample)

Also Published As

Publication number Publication date
US1550769A (en) 1925-08-25
FR587290A (enExample) 1925-04-15

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