GB207257A - Improvements in or relating to coding or de-coding machines - Google Patents
Improvements in or relating to coding or de-coding machinesInfo
- Publication number
- GB207257A GB207257A GB2287022A GB2287022A GB207257A GB 207257 A GB207257 A GB 207257A GB 2287022 A GB2287022 A GB 2287022A GB 2287022 A GB2287022 A GB 2287022A GB 207257 A GB207257 A GB 207257A
- Authority
- GB
- United Kingdom
- Prior art keywords
- key
- code
- keys
- disc
- port
- 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
- G09C3/02—Typewriters for ciphering or deciphering cryptographic text with auxiliary keys or keyboards acting on the original keys or keyboards
Abstract
207,257. Hole, S. Aug. 22, 1922. Machines for coding and decoding.-Relates to coding and decoding machines of the kind in which one set of keys is connected to a second set of keys through a code-changing device comprising two relatively movable members having aligned transmission points for each key. The invention comprises two sets of keys both operatively connected to its own mechanism for writing, a single connection between each key and the code-changing device, self-operating means for each key, means for controlling the self-operation of one set from the other set, and change-over mechanism adapted to connect either set of keys so that it can be manually operated to control the self-operation of the other set, its own self-operating means being rendered inoperative. The controlling means is in the form of a key-operated switch mechanism for connecting the source of power through the code-changing mechanism, and the change-over mechanism comprises a hand-operated switch. In a pneumatic arrangement, the keys A', B<1> of two standard typewriters A, B are connected together through a code-changing device E, E<1> bv pneumatic transmission tubes G<1>, G<2>, G<3>, N, F, F<1> connected with an exhaust chamber G. The disc E of the code-changing device is fixed and provided with a circular series of ports E<3> engaged by nipples E<4> connected to the tubes F. The movable disc E<1> is provided with a circular series of tapered holes E<5> engaged by hollow tapered plugs F<2> connected to the tubes F<1>. Each plug F<2> is provided with a flat F' on which a sign is marked, so that by slipping the plugs out of their holes different key-settings can be readily made. The movable disc is provided with teeth E<6> and is stepped round by a pawl K<3> when the key K is depressed. In the normal position of the key the pawl K<3> abuts a stop K<4> and is clear of the teeth E<6>, the disc being held against movement by a retaining-pawl J. At the end of one revolution of the disc a stop J<6> thereon engages a pin J' on the retaining-pawl, and the disc is returned to its zero position under the action of a helical spring E<7>. Both code-changing members E, E<1> may be movable. The transmission tubes F, F' are threaded through holes in plates L marked with signs corresponding with the keys, so that any particular tube can be readily located. Pneumatic keyboard operators. - The valve chests C on each typewriter comprise cylinders C<2> containing pistons C' connected to the keylevers by links B<2>, a port C<5> in each piston being normally out of lines with a transverse passage C<3>. Each passage C<3> communicates with a longitudinal passage C<4> blocked at one end and connected to one of the transmission tubes N at the other end. A valve M closed at its upper end has a side port M<1>, and is raised or lowered by a hand-operated cam-slotted slide M<3> common to all the key-levers in one row. The port M' can be put into communication either with the passage M<2>, in which case the key-lever is lowered by atmospheric pressure, or it may be put into communication with the transverse passage C<3> so that when the key-lever is depressed manually the port C<5> is in line with the port M<1> and power is transmitted through the code-changing discs.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2287022A GB207257A (en) | 1922-08-22 | 1922-08-22 | Improvements in or relating to coding or de-coding machines |
US658158A US1523689A (en) | 1922-08-22 | 1923-08-18 | Coding and decoding machine |
FR570607D FR570607A (en) | 1922-08-22 | 1923-08-21 | Improvements to machines for encrypting or decrypting messages |
DEH94585D DE466819C (en) | 1922-08-22 | 1923-08-23 | Device for encryption and decryption |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2287022A GB207257A (en) | 1922-08-22 | 1922-08-22 | Improvements in or relating to coding or de-coding machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB207257A true GB207257A (en) | 1923-11-22 |
Family
ID=10186337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2287022A Expired GB207257A (en) | 1922-08-22 | 1922-08-22 | Improvements in or relating to coding or de-coding machines |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE466819C (en) |
FR (1) | FR570607A (en) |
GB (1) | GB207257A (en) |
-
1922
- 1922-08-22 GB GB2287022A patent/GB207257A/en not_active Expired
-
1923
- 1923-08-21 FR FR570607D patent/FR570607A/en not_active Expired
- 1923-08-23 DE DEH94585D patent/DE466819C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR570607A (en) | 1924-05-05 |
DE466819C (en) | 1928-10-15 |
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