GB529788A - Voice controlled switching devices for telephone circuits - Google Patents

Voice controlled switching devices for telephone circuits

Info

Publication number
GB529788A
GB529788A GB1570939A GB1570939A GB529788A GB 529788 A GB529788 A GB 529788A GB 1570939 A GB1570939 A GB 1570939A GB 1570939 A GB1570939 A GB 1570939A GB 529788 A GB529788 A GB 529788A
Authority
GB
United Kingdom
Prior art keywords
gain
path
pads
speech
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
GB1570939A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 BE476750D priority Critical patent/BE476750A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1570939A priority patent/GB529788A/en
Publication of GB529788A publication Critical patent/GB529788A/en
Priority to FR991751D priority patent/FR991751A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GB1570939A 1939-05-26 1939-05-26 Voice controlled switching devices for telephone circuits Expired GB529788A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE476750D BE476750A (OSRAM) 1939-05-26
GB1570939A GB529788A (en) 1939-05-26 1939-05-26 Voice controlled switching devices for telephone circuits
FR991751D FR991751A (fr) 1939-05-26 1947-02-28 Dispositifs de commutation commandés par la voix pour circuits téléphoniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1570939A GB529788A (en) 1939-05-26 1939-05-26 Voice controlled switching devices for telephone circuits

Publications (1)

Publication Number Publication Date
GB529788A true GB529788A (en) 1940-11-28

Family

ID=10064063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1570939A Expired GB529788A (en) 1939-05-26 1939-05-26 Voice controlled switching devices for telephone circuits

Country Status (3)

Country Link
BE (1) BE476750A (OSRAM)
FR (1) FR991751A (OSRAM)
GB (1) GB529788A (OSRAM)

Also Published As

Publication number Publication date
FR991751A (fr) 1951-10-10
BE476750A (OSRAM)

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