GB154962A - Improvement in code machines - Google Patents
Improvement in code machinesInfo
- Publication number
- GB154962A GB154962A GB1930719A GB1930719A GB154962A GB 154962 A GB154962 A GB 154962A GB 1930719 A GB1930719 A GB 1930719A GB 1930719 A GB1930719 A GB 1930719A GB 154962 A GB154962 A GB 154962A
- Authority
- GB
- United Kingdom
- Prior art keywords
- keyboard
- code
- typewriter
- worm
- disc
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
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
- G09C3/04—Typewriters for ciphering or deciphering cryptographic text wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member
- G09C3/06—Typewriters for ciphering or deciphering cryptographic text wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member the connections being mechanical
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Rotary Presses (AREA)
- Input From Keyboards Or The Like (AREA)
- Storage Device Security (AREA)
Abstract
154,962. Powers, J. Aug. 5, 1919. Machines for coding and decoding; keyboard operators.-A typewriter is adapted for writing in code or decoding, by providing a rotatable keyboard operator which carries a set of characterkeys corresponding with the character-keys of the typewriter and is turned to change the code. In the apparatus shown in Figs. 1 and 4, the keyboardoperator 1 is mounted to rotate about a vertical axis and is supported by a base 6 which is provided with parts 5 for supporting the typewriter 2. The keyboard-operator comprises discs 10, 12 which are connected by bolts 13 and a shaft 19 mounted in a bearing 8, the disc 12 being supported by balls 22 arranged in a race 9. The keyboard-operator is provided with plunger-keys 11 which are arranged in a circle and operate levers 28 connected by links 27 to the key-levers 4, the upturned ends 30 being arranged in a circle and underneath the plungerkeys. The disc 10 is provided with a depending rim 17 which forms a continuation of a stationary rim 24, the two rims being formed with symbols, for example, numbered graduations 25, 26, for indicating the code-key. The disc 12 is formed as a worm-wheel engaging a worm 14 which is operated by a crank 15. Locking-devices.-To prevent unauthorized use of the apparatus, the crank 15 may be formed with a key for engaging a barrel-lock in the worm 14. A seal 35, Fig. 4, may be applied to the bottom of the shaft 19 to prevent tampering.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1930719A GB154962A (en) | 1919-08-05 | 1919-08-05 | Improvement in code machines |
FR503071A FR503071A (en) | 1919-08-05 | 1919-08-26 | Automatic cryptography method and apparatus |
DE1921P0042764 DE383003C (en) | 1919-08-05 | 1921-09-02 | Device for transcribing and deciphering encrypted messages |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1930719A GB154962A (en) | 1919-08-05 | 1919-08-05 | Improvement in code machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB154962A true GB154962A (en) | 1920-12-06 |
Family
ID=10127201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1930719A Expired GB154962A (en) | 1919-08-05 | 1919-08-05 | Improvement in code machines |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE383003C (en) |
FR (1) | FR503071A (en) |
GB (1) | GB154962A (en) |
-
1919
- 1919-08-05 GB GB1930719A patent/GB154962A/en not_active Expired
- 1919-08-26 FR FR503071A patent/FR503071A/en not_active Expired
-
1921
- 1921-09-02 DE DE1921P0042764 patent/DE383003C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE383003C (en) | 1923-10-09 |
FR503071A (en) | 1920-06-02 |
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