GB328024A - Improvements in or relating to the generation of pulsating electric current - Google Patents

Improvements in or relating to the generation of pulsating electric current

Info

Publication number
GB328024A
GB328024A GB159729A GB159729A GB328024A GB 328024 A GB328024 A GB 328024A GB 159729 A GB159729 A GB 159729A GB 159729 A GB159729 A GB 159729A GB 328024 A GB328024 A GB 328024A
Authority
GB
United Kingdom
Prior art keywords
relay
relating
generation
electric current
pulsating electric
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
GB159729A
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.)
Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing Co Ltd
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 Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Priority to GB159729A priority Critical patent/GB328024A/en
Publication of GB328024A publication Critical patent/GB328024A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

328,024. Automatic Telephone Manufacturing Co., Ltd., and Williams, M. O. Jan. 16, 1929. Automatic exchange apparatus. - A relay B is arranged to shortcircuit its own winding on operation and thus to connect pulsating current to a circuit connected to one of its terminals, to which an inductance coil A is also connected to increase the voltage fluctuations in the winding of the relay. To quench sparking a condenser Q and resistance R are provided. A copper slug may be fitted to the relay to lower the frequency of the current supplied.
GB159729A 1929-01-16 1929-01-16 Improvements in or relating to the generation of pulsating electric current Expired GB328024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB159729A GB328024A (en) 1929-01-16 1929-01-16 Improvements in or relating to the generation of pulsating electric current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB159729A GB328024A (en) 1929-01-16 1929-01-16 Improvements in or relating to the generation of pulsating electric current

Publications (1)

Publication Number Publication Date
GB328024A true GB328024A (en) 1930-04-16

Family

ID=9724699

Family Applications (1)

Application Number Title Priority Date Filing Date
GB159729A Expired GB328024A (en) 1929-01-16 1929-01-16 Improvements in or relating to the generation of pulsating electric current

Country Status (1)

Country Link
GB (1) GB328024A (en)

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