GB191218677A - An Improved Telephone System. - Google Patents

An Improved Telephone System.

Info

Publication number
GB191218677A
GB191218677A GB191218677DA GB191218677A GB 191218677 A GB191218677 A GB 191218677A GB 191218677D A GB191218677D A GB 191218677DA GB 191218677 A GB191218677 A GB 191218677A
Authority
GB
United Kingdom
Prior art keywords
switches
line
key
switch
contact
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
Other languages
English (en)
Inventor
Joseph Friedrich Baumann
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB191218677A publication Critical patent/GB191218677A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/08—Manual exchanges using connecting means other than cords

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Telephone Set Structure (AREA)
GB191218677D 1911-08-14 1912-08-14 An Improved Telephone System. Expired GB191218677A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191218677X 1911-08-14

Publications (1)

Publication Number Publication Date
GB191218677A true GB191218677A (en) 1913-03-06

Family

ID=32604438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191218677D Expired GB191218677A (en) 1911-08-14 1912-08-14 An Improved Telephone System.

Country Status (2)

Country Link
DE (1) DE250687C (enrdf_load_stackoverflow)
GB (1) GB191218677A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE250687C (enrdf_load_stackoverflow)

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