CH343442A - Fernschreibmaschine mit Schlüsselzusatzeinrichtung - Google Patents
Fernschreibmaschine mit SchlüsselzusatzeinrichtungInfo
- 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
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES41774A DE1028159B (de) | 1954-12-01 | 1954-12-01 | Betriebsarten-Umschalteeinrichtung fuer an Fernschreibmaschinen anbaubare Schluesselzusatzeinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
CH343442A true CH343442A (de) | 1959-12-31 |
Family
ID=7484106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH343442D CH343442A (de) | 1954-12-01 | 1955-11-15 | Fernschreibmaschine mit Schlüsselzusatzeinrichtung |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH343442A (de) |
DE (1) | DE1028159B (de) |
FR (1) | FR1137957A (de) |
-
1954
- 1954-12-01 DE DES41774A patent/DE1028159B/de active Pending
-
1955
- 1955-11-15 CH CH343442D patent/CH343442A/de unknown
- 1955-12-01 FR FR1137957D patent/FR1137957A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1137957A (fr) | 1957-06-06 |
DE1028159B (de) | 1958-04-17 |
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