NL31271C - - Google Patents

Info

Publication number
NL31271C
NL31271C NL31271DA NL31271C NL 31271 C NL31271 C NL 31271C NL 31271D A NL31271D A NL 31271DA NL 31271 C NL31271 C NL 31271C
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 NL31271C publication Critical patent/NL31271C/xx

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
    • H04M1/32—Locking setting devices during transmission to prevent interference by user
NL31271D 1930-07-08 NL31271C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE579407T 1930-07-08

Publications (1)

Publication Number Publication Date
NL31271C true NL31271C (en)

Family

ID=34584667

Family Applications (1)

Application Number Title Priority Date Filing Date
NL31271D NL31271C (en) 1930-07-08

Country Status (4)

Country Link
DE (1) DE579407C (en)
FR (1) FR713878A (en)
GB (1) GB359852A (en)
NL (1) NL31271C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1007815B (en) * 1951-12-26 1957-05-09 Lorenz C Ag Number switch for telephones with an inertia contact controlled by the spindle

Also Published As

Publication number Publication date
DE579407C (en) 1933-06-26
FR713878A (en) 1931-11-04
GB359852A (en) 1931-10-29

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