GB324954A - Improvements in or relating to telephone instruments - Google Patents

Improvements in or relating to telephone instruments

Info

Publication number
GB324954A
GB324954A GB32544/28A GB3254428A GB324954A GB 324954 A GB324954 A GB 324954A GB 32544/28 A GB32544/28 A GB 32544/28A GB 3254428 A GB3254428 A GB 3254428A GB 324954 A GB324954 A GB 324954A
Authority
GB
United Kingdom
Prior art keywords
exchange line
extension
depression
instrument
levers
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
GB32544/28A
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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 BE361647D priority Critical patent/BE361647A/xx
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Priority to GB32544/28A priority patent/GB324954A/en
Priority to US400402A priority patent/US1932647A/en
Publication of GB324954A publication Critical patent/GB324954A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Structure Of Telephone Exchanges (AREA)
GB32544/28A 1928-11-07 1928-11-07 Improvements in or relating to telephone instruments Expired GB324954A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE361647D BE361647A (zh) 1928-11-07
GB32544/28A GB324954A (en) 1928-11-07 1928-11-07 Improvements in or relating to telephone instruments
US400402A US1932647A (en) 1928-11-07 1929-10-17 Telephone instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32544/28A GB324954A (en) 1928-11-07 1928-11-07 Improvements in or relating to telephone instruments

Publications (1)

Publication Number Publication Date
GB324954A true GB324954A (en) 1930-02-07

Family

ID=10340221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32544/28A Expired GB324954A (en) 1928-11-07 1928-11-07 Improvements in or relating to telephone instruments

Country Status (3)

Country Link
US (1) US1932647A (zh)
BE (1) BE361647A (zh)
GB (1) GB324954A (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548723A (en) * 1945-07-13 1951-04-10 Kellogg Switchboard & Supply Telephone set hook-switch apparatus
US2541336A (en) * 1948-08-23 1951-02-13 Automatic Elect Lab Secretary's answering key cabinet

Also Published As

Publication number Publication date
US1932647A (en) 1933-10-31
BE361647A (zh)

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