CH477078A - Keypad for code selection in telecommunication systems, especially telephone systems - Google Patents

Keypad for code selection in telecommunication systems, especially telephone systems

Info

Publication number
CH477078A
CH477078A CH551568A CH551568A CH477078A CH 477078 A CH477078 A CH 477078A CH 551568 A CH551568 A CH 551568A CH 551568 A CH551568 A CH 551568A CH 477078 A CH477078 A CH 477078A
Authority
CH
Switzerland
Prior art keywords
systems
keypad
code selection
especially telephone
telecommunication
Prior art date
Application number
CH551568A
Other languages
German (de)
Inventor
Greska Hanns
Ludwig Max
Awakowicz Erwin
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Publication of CH477078A publication Critical patent/CH477078A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Push-Button Switches (AREA)
CH551568A 1967-04-14 1968-04-11 Keypad for code selection in telecommunication systems, especially telephone systems CH477078A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1967S0109334 DE1291382B (en) 1967-04-14 1967-04-14 Keypad for code selection, in which magnetizable contacts are influenced with the help of changeable permanent magnetic fields

Publications (1)

Publication Number Publication Date
CH477078A true CH477078A (en) 1969-08-15

Family

ID=7529442

Family Applications (1)

Application Number Title Priority Date Filing Date
CH551568A CH477078A (en) 1967-04-14 1968-04-11 Keypad for code selection in telecommunication systems, especially telephone systems

Country Status (6)

Country Link
AT (1) AT289899B (en)
BE (1) BE713667A (en)
CH (1) CH477078A (en)
DE (1) DE1291382B (en)
GB (1) GB1196861A (en)
NL (1) NL6804545A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413585B2 (en) * 1973-08-25 1979-05-31

Also Published As

Publication number Publication date
AT289899B (en) 1971-05-10
GB1196861A (en) 1970-07-01
BE713667A (en) 1968-10-14
DE1291382B (en) 1969-03-27
NL6804545A (en) 1968-10-15

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Legal Events

Date Code Title Description
PL Patent ceased