CH343442A - Teletypewriter with additional key device - Google Patents

Teletypewriter with additional key device

Info

Publication number
CH343442A
CH343442A CH343442DA CH343442A CH 343442 A CH343442 A CH 343442A CH 343442D A CH343442D A CH 343442DA CH 343442 A CH343442 A CH 343442A
Authority
CH
Switzerland
Prior art keywords
teletypewriter
key device
additional key
additional
key
Prior art date
Application number
Other languages
German (de)
Inventor
Fritz Dipl Ing Butzke
Herbert Dipl Ing Wuesteney
Bekaert Phillippe
Kussener Rudolphe
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 CH343442A publication Critical patent/CH343442A/en

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C3/00—Typewriters for ciphering or deciphering cryptographic text
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/12—Details relating to cryptographic hardware or logic circuitry

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Push-Button Switches (AREA)
CH343442D 1954-12-01 1955-11-15 Teletypewriter with additional key device CH343442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES41774A DE1028159B (en) 1954-12-01 1954-12-01 Operating mode switching device for additional key device that can be attached to teleprinters

Publications (1)

Publication Number Publication Date
CH343442A true CH343442A (en) 1959-12-31

Family

ID=7484106

Family Applications (1)

Application Number Title Priority Date Filing Date
CH343442D CH343442A (en) 1954-12-01 1955-11-15 Teletypewriter with additional key device

Country Status (3)

Country Link
CH (1) CH343442A (en)
DE (1) DE1028159B (en)
FR (1) FR1137957A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL233484A (en) 1958-01-07

Also Published As

Publication number Publication date
FR1137957A (en) 1957-06-06
DE1028159B (en) 1958-04-17

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