NL252052A - - Google Patents

Info

Publication number
NL252052A
NL252052A NL252052DA NL252052A NL 252052 A NL252052 A NL 252052A NL 252052D A NL252052D A NL 252052DA NL 252052 A NL252052 A NL 252052A
Authority
NL
Netherlands
Application number
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.)
Publication of NL252052A publication Critical patent/NL252052A/xx

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
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Mobile Radio Communication Systems (AREA)
NL252052D 1959-05-28 NL252052A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1823659A GB925514A (en) 1959-05-28 1959-05-28 Improvements relating to telephone system substation circuits and to tone current generating oscillations suitable for use in such circuits

Publications (1)

Publication Number Publication Date
NL252052A true NL252052A (enrdf_load_html_response)

Family

ID=10108997

Family Applications (1)

Application Number Title Priority Date Filing Date
NL252052D NL252052A (enrdf_load_html_response) 1959-05-28

Country Status (3)

Country Link
DE (1) DE1142637B (enrdf_load_html_response)
GB (1) GB925514A (enrdf_load_html_response)
NL (1) NL252052A (enrdf_load_html_response)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1059606A (en) * 1964-08-25 1967-02-22 Sits Soc It Telecom Siemens A ringer
CN113483882B (zh) * 2021-06-29 2023-03-14 重庆长安新能源汽车科技有限公司 一种电控发声装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE563265A (enrdf_load_html_response) * 1956-06-22

Also Published As

Publication number Publication date
GB925514A (en) 1963-05-08
DE1142637B (de) 1963-01-24

Similar Documents

Publication Publication Date Title
BE584924A (enrdf_load_html_response)
AT213532B (enrdf_load_html_response)
AT218043B (enrdf_load_html_response)
NL247360A (enrdf_load_html_response)
SE300176B (enrdf_load_html_response)
BE38840A (enrdf_load_html_response)
BE503570A (enrdf_load_html_response)
BE549973A (enrdf_load_html_response)
BE570722A (enrdf_load_html_response)
BE575035A (enrdf_load_html_response)
BE575242A (enrdf_load_html_response)
BE575907A (enrdf_load_html_response)
BE577032A (enrdf_load_html_response)
BE577193A (enrdf_load_html_response)
BE577267A (enrdf_load_html_response)
BE578264A (enrdf_load_html_response)
BE578357A (enrdf_load_html_response)
BE578868A (enrdf_load_html_response)
BE579636A (enrdf_load_html_response)
BE579739A (enrdf_load_html_response)
BE580249A (enrdf_load_html_response)
BE581586A (enrdf_load_html_response)
BE581863A (enrdf_load_html_response)
BE581936A (enrdf_load_html_response)
BE582128A (enrdf_load_html_response)