GB154962A - Improvement in code machines - Google Patents

Improvement in code machines

Info

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
Application number
GB1930719A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1930719A priority Critical patent/GB154962A/en
Priority to FR503071A priority patent/FR503071A/en
Publication of GB154962A publication Critical patent/GB154962A/en
Priority to DE1921P0042764 priority patent/DE383003C/en
Expired legal-status Critical Current

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.
GB1930719A 1919-08-05 1919-08-05 Improvement in code machines Expired GB154962A (en)

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)

Also Published As

Publication number Publication date
DE383003C (en) 1923-10-09
FR503071A (en) 1920-06-02

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