GB549325A - Improvements in or relating to automatic telephone systems - Google Patents

Improvements in or relating to automatic telephone systems

Info

Publication number
GB549325A
GB549325A GB2925/42A GB292542A GB549325A GB 549325 A GB549325 A GB 549325A GB 2925/42 A GB2925/42 A GB 2925/42A GB 292542 A GB292542 A GB 292542A GB 549325 A GB549325 A GB 549325A
Authority
GB
United Kingdom
Prior art keywords
tubes
priming
group
tube
link
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
GB2925/42A
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.)
AT&T Corp
Original Assignee
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 Inc filed Critical Western Electric Co Inc
Publication of GB549325A publication Critical patent/GB549325A/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)
  • Devices For Supply Of Signal Current (AREA)
GB2925/42A 1941-02-08 1942-03-06 Improvements in or relating to automatic telephone systems Expired GB549325A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US377996A US2291224A (en) 1941-02-08 1941-02-08 Selecting system

Publications (1)

Publication Number Publication Date
GB549325A true GB549325A (en) 1942-11-16

Family

ID=23491313

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2925/42A Expired GB549325A (en) 1941-02-08 1942-03-06 Improvements in or relating to automatic telephone systems

Country Status (3)

Country Link
US (1) US2291224A (enrdf_load_stackoverflow)
GB (1) GB549325A (enrdf_load_stackoverflow)
NL (1) NL69254C (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE485493A (enrdf_load_stackoverflow) * 1947-10-29
US2594389A (en) * 1948-08-04 1952-04-29 Bell Telephone Labor Inc Double-lockout interconnecting system
US2542672A (en) * 1948-10-27 1951-02-20 Bell Telephone Labor Inc Coordinate selecting and lockout circuit
US2562100A (en) * 1948-11-17 1951-07-24 Bell Telephone Labor Inc Coordinate selecting and lock-out circuit

Also Published As

Publication number Publication date
NL69254C (enrdf_load_stackoverflow) 1900-01-01
US2291224A (en) 1942-07-28

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