CH247879A - Kontakteinrichtung an einem Nummernschalter einer Sprechgarnitur. - Google Patents

Kontakteinrichtung an einem Nummernschalter einer Sprechgarnitur.

Info

Publication number
CH247879A
CH247879A CH247879DA CH247879A CH 247879 A CH247879 A CH 247879A CH 247879D A CH247879D A CH 247879DA CH 247879 A CH247879 A CH 247879A
Authority
CH
Switzerland
Prior art keywords
headset
contact device
number switch
switch
contact
Prior art date
Application number
Other languages
English (en)
Inventor
Aktiengesellschaft Autophon
Original Assignee
Autophon Ag
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 Autophon Ag filed Critical Autophon Ag
Publication of CH247879A publication Critical patent/CH247879A/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/40—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses wherein the setting-operation short-circuits or open-circuits the transmitting mechanism during a variable part of a cycle
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
CH247879D 1943-05-21 1943-05-21 Kontakteinrichtung an einem Nummernschalter einer Sprechgarnitur. CH247879A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH599308X 1943-05-21

Publications (1)

Publication Number Publication Date
CH247879A true CH247879A (de) 1947-03-31

Family

ID=4522645

Family Applications (1)

Application Number Title Priority Date Filing Date
CH247879D CH247879A (de) 1943-05-21 1943-05-21 Kontakteinrichtung an einem Nummernschalter einer Sprechgarnitur.

Country Status (3)

Country Link
US (1) US2424423A (de)
CH (1) CH247879A (de)
GB (1) GB599308A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2848552A (en) * 1955-08-11 1958-08-19 Itt Loud-speaking station for automatic telephone systems

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1652645A (en) * 1920-12-20 1927-12-13 Kellogg Switchboard & Supply Substation circuit
US1424368A (en) * 1921-01-21 1922-08-01 Automatic Electric Co Substation telephone circuits
US1551626A (en) * 1921-08-02 1925-09-01 Automatic Electric Co Substation telephone circuits

Also Published As

Publication number Publication date
GB599308A (en) 1948-03-10
US2424423A (en) 1947-07-22

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