GB348069A - An improved device for use in connection with codes - Google Patents

An improved device for use in connection with codes

Info

Publication number
GB348069A
GB348069A GB382130A GB382130A GB348069A GB 348069 A GB348069 A GB 348069A GB 382130 A GB382130 A GB 382130A GB 382130 A GB382130 A GB 382130A GB 348069 A GB348069 A GB 348069A
Authority
GB
United Kingdom
Prior art keywords
strips
frame
code
symbols
signs
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
GB382130A
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.)
CHARLES RAYMOND MEGSON
CHARLES SUNDERLAND
Original Assignee
CHARLES RAYMOND MEGSON
CHARLES SUNDERLAND
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 CHARLES RAYMOND MEGSON, CHARLES SUNDERLAND filed Critical CHARLES RAYMOND MEGSON
Priority to GB382130A priority Critical patent/GB348069A/en
Publication of GB348069A publication Critical patent/GB348069A/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
    • G09C1/00—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
    • G09C1/04—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system with sign carriers or indicators moved relative to one another to positions determined by a permutation code, or key, so as to indicate the appropriate corresponding clear or ciphered text

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)

Abstract

348,069. Coding-devices. SUNDERLAND, C. and MEGSON, C. R., 11, Queen Victoria Street, London. Feb. 4, 1930, No. 3821. [Class 146 (ii).] A device for the use of alternative codes comprises a plurality of strips 4, mounted in a frame 1, having transparent sides, so that the set of symbols and appropriate code signs on one side of the strips 4 may be observed, while the corresponding complementary code signs and symbols on the reverse side of the strips 4 are available by turning the frame over back to front. The strips are interchangeable and are provided with suitable symbols 11 for arranging them in predetermined sequence. The code symbols are printed in different colours on the back and front of the strips and a narrow black line of demarcation 20 is provided along the longitudinal edges of each face. Finger-pieces 5 are provided in the frame 1 for removal of the strips. The code cards are normally arranged in compartments in a box, which also serves to accommodate the frame: alternatively a protecting wallet may be provided for carrying the frame, furnished with pockets to receive the strips. In a modification the code strips may be arranged horizontally.
GB382130A 1930-02-04 1930-02-04 An improved device for use in connection with codes Expired GB348069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB382130A GB348069A (en) 1930-02-04 1930-02-04 An improved device for use in connection with codes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB382130A GB348069A (en) 1930-02-04 1930-02-04 An improved device for use in connection with codes

Publications (1)

Publication Number Publication Date
GB348069A true GB348069A (en) 1931-05-04

Family

ID=9765551

Family Applications (1)

Application Number Title Priority Date Filing Date
GB382130A Expired GB348069A (en) 1930-02-04 1930-02-04 An improved device for use in connection with codes

Country Status (1)

Country Link
GB (1) GB348069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2445611A (en) * 2007-01-09 2008-07-16 John Clifford Compton Linear slide rule for decoding symbolic data

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2445611A (en) * 2007-01-09 2008-07-16 John Clifford Compton Linear slide rule for decoding symbolic data

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