US2116683A - Coding and decoding machine - Google Patents

Coding and decoding machine Download PDF

Info

Publication number
US2116683A
US2116683A US107306A US10730636A US2116683A US 2116683 A US2116683 A US 2116683A US 107306 A US107306 A US 107306A US 10730636 A US10730636 A US 10730636A US 2116683 A US2116683 A US 2116683A
Authority
US
United States
Prior art keywords
coding
lemmon
filed oct
sheet
sheets
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 - Lifetime
Application number
US107306A
Other languages
English (en)
Inventor
Walter S Lemmon
Albert C Holt
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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
Priority to DENDAT958111D priority Critical patent/DE958111C/de
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US107306A priority patent/US2116683A/en
Priority to GB26597/37A priority patent/GB488337A/en
Priority to FR830766D priority patent/FR830766A/fr
Application granted granted Critical
Publication of US2116683A publication Critical patent/US2116683A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • FIG.17A is a diagrammatic representation of FIG.17A.
  • This invention relates to the art ofsecret writing and more particularly to a system for transforming language messages into decodable secret code.
  • This invention is an improvement of the coding system disclosed in the copending application Serial No. 81,178, filed May 22, 1936.
  • the invention described in the said application relates to a system in which the coding circuits between an operating machine and a translating machine are transposed at irregular and arbitrary intervals, and also in which the sequence of connections to the coding commutator segments may be varied automatically in an arbitrary manner.
  • Checking and locking circuits are provided so that during the typing cycles the carriage return mechanism is locked and after typing a predetermined number of characters, the character keyboard is locked and the carriage return mechanism is released. If all the control units failed to respond properly, error detecting circuits are energized to prevent the releasing of the carriage return mechanism.
  • Circuits are also provided to lock the keyboard and carriage return upon completion of typing a group of lines of predetermined copy and a test key operation is necessary to return the carriages automatically to the left margin position.
  • the carriages are returned if the control units function correctly and a recording of a symbol at both units is made which indicates the correct functioning of the units. If an error was made in the functioning of the control elements during the said group of lines, an error key operation is necessary which causes the coding control units to be realigned to the last test position. If, as mentioned, the control units operated correctly and operation of the test key indicates this condition, additional control units are actuated, which, if an error has been made by the control units, are not operated.
  • Other features will be disclosed during the description of the said invention, one of which is the automatic homing circuits for the coding control units which are energized upon operation of a reset key to realign all the coding control ele ments to a normal reference point.
  • the present invention relates to an improvement of the invention referred to in said application. It was mentioned that in the system of the said application automatic homing circuits were provided to return the coding control elements to a normal reference point. The present invention proposes to automatically change the normal reference point upon operation of the reset key so that the coding control elements do 1936, Serial No. 107,306
  • the object of the present invention is to prevent repetition of cycles on the coding pattern for different individual messages, so that upon comparison of the individual messages no clue can be obtained as to the manner of the cyclic operation of the system.
  • Fig. 1 is a plan view of the power operated coding control elements.-
  • Fig. 2 is a detailed view of the coding commutator control device.
  • Fig. 3 is a detail of one of the control elements of the commutator control device.
  • Figs. 4 to 8 inclusive show the construction of the coding commutators.
  • Fig. 9 is a detailed contact arrangement of the coding commutator control device.
  • Fig. 10 shows the brush arrangement of the coding commutators.
  • Figs. 11 to 13 show in detail the clutch control units.
  • Fig. .14 is a fragmentary, sectional elevation illustrating a portion of a power operated typewriter including certain control features.
  • Fig. 15 is a detail view of the carriage contact bar and brush arrangement.
  • Fig. 16 is a detail view of the keyboard locking arrangement.
  • Figs. 1'7 and 17A to D show the circuit arrangement for controlling the coding control elements.
  • Fig. 18 shows the correct figure layout for Figs. 17, 17A to D.
  • Fig. 19 shows the correct figure layout for Figs. 20, 20A to 20D.
  • Figs. 20, 20A to 20D show a preferred arrangement of the typing circuits for coding and decoding operations.
  • Fig. 21 is a layout of the plug arrangement for the coding commutator control device.
  • the illustrative embodiment of the invention includes two typewriters to be interconnected for coding purposes.
  • the apparatus is effective,
  • the system as illustrated herein comprises a primary typewriter, upon which the messages to be translated are typed and recorded and may be designated as the operating unit, and a secondary typewriter or translating unit for translating and recording messages typed on the primary or operating unit.
  • a primary typewriter upon which the messages to be translated are typed and recorded and may be designated as the operating unit
  • a secondary typewriter or translating unit for translating and recording messages typed on the primary or operating unit.
  • Any standard typing unit may be used; however, it is preferred to employ the electromatic type.
  • Said units comprise a revoluble platen l mounted in the frame of a carriage 2 which is mounted for movement transversely of the frame 3 of the machine on anti-friction bearings 4 arranged in guideways provided therefor in the carriage and frame of the machine, (refer to Fig. 14).
  • Type bars 5 are pivoted in a type basket 6 in the frame of the machine and are provided with types 1 adjacent their free ends adapted to engage the platen or the work sheet thereon when the type bars are swung on their pivots.
  • Power driven devices are provided for operating the type bars or other printing instrumentalities of the machine.
  • Said devices comprise actuators in the form of bell crank levers 8 pivoted on a common pivot rod 9 and having one arm connected with an arm of a bell crank lever H by means of the link I2.
  • the bell crank lever l I is pivoted on the common pivot rod l3 and its other arm I4 is connected with the-free end of a toggle lever l5 by means of a link H].
  • the lever I5 is pivoted to the arm l6 of the type bar, and at its other end-is pivotally connected with the free end of a toggle link I! pivoted on a fixed part of the frame.
  • a spring l8 connects the arm l4 of the bell crank with a fixed part of the frame and resiliently maintains the parts in the normal position as shown in the figure of the drawings, in which the type bar is retracted and the toggle l5, I1 is in straightened position.
  • the actuator lever 8 When the actuator lever 8 is swung to pull the link l2, it operates to swing the lever 15 in a direction to break the toggle and swing the type bar into printing engagement with the platen.
  • the bell crank 8 has an arm I9 projecting downwardly on the free end of which a cam 2
  • a spring-pressed arm 23 engages a lug 24 on the cam and tends to swing it on its pivot into engagement with the roller or a projection 20 thereon into engagement with a stop 25 on a detent lever 26 pivoted on the bell crank 8.
  • the lever 26 At its upper end, the lever 26 has a lateral projection whereby it is engaged by the slotted end of an arm 21 projecting downwardly from a key lever 28.
  • the key lever is pivoted on the common pivot rod [3 and has a key 29 whereby it may be manually operated.
  • a spring 30 connects the key lever with a fixed part and resiliently maintains the key lever and parts connected therewith in the normal position as shown.
  • the key When the key is depressed, it swings the detent lever to move its stop 25 out of the path of the projection 20 and permits the cam to turn under the action of the arm 23 into engagement with the roller.
  • the cam is then rotated by the roller and swings the lever B to swing the bell crank II, which swings the type bar into engagement with the platen.
  • the type bar When the type bar is actuated to print, it engages the universal bar 3i to release the escapement mechanism, shown generally at 32, of the carriage 2.
  • 01' may be, of usual construction and form no part of the present invention except as they enter into combination therewith.
  • a transverse bar 33 preferably of insulating material, the said bar is adapted to extend the entire length of the carriage.
  • a conducting bar or segment 34 having a plurality of slots 35 formed therein to expose sections of the insulating member 33 as shown in Fig. 15 of the drawings.
  • the slotted or insulated sections of the contact bar are so arranged that when the typewriter carriage is positioned to start typing on the work copy, that is, when the carriage is at the left margin position, the slot 35 is positioned so that one of the brushes 36 engages the insulated section 33.
  • the slotted section 35a will be positioned so that one of the brushes 36 engages the insulated section 33 and likewise after typing an additional number of characters, again, for example, 8 characters, or signs, the slotted section 35b will be positioned so that one of the brushes 36 engages the insulated section 33. Therefore, it will be understood that the carriage position at the left margin position or after typing 45 or 53 characters or signs is effective to open the circuits connected to the said brushes. It is to be noted that the carriage position contact arrangement is provided on both the primary or operating unit and the secondary or translating unit, the purpose of which will be understood as the description progresses.
  • a bracket 38 supporting a follower roller 39 which is adapted to actuate the spring blade of suitably positioned contacts 46 or 4i to close said contacts when the said cam 2
  • the single and double types of contact arrangements are shown cooperating with the said roller 39 for the reason that certain keys upon their depression control several different circuit arrangements which will be explained later herein.
  • the combined diameter of the rollers 45 is such that they contact each other and the ends of the trough when a key bar is depressed and inserted between two adjacent rollers. It will be

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Input From Keyboards Or The Like (AREA)
US107306A 1936-10-24 1936-10-24 Coding and decoding machine Expired - Lifetime US2116683A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DENDAT958111D DE958111C (de) 1936-10-24 Verschlüsselungseinrichtung fur Chiffrier-Schreibmaschinen
US107306A US2116683A (en) 1936-10-24 1936-10-24 Coding and decoding machine
GB26597/37A GB488337A (en) 1936-10-24 1937-10-01 Improvements in or relating to coding and decoding machines
FR830766D FR830766A (fr) 1936-10-24 1937-10-22 Perfectionnements aux machines ou appareils de cryptographie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US107306A US2116683A (en) 1936-10-24 1936-10-24 Coding and decoding machine

Publications (1)

Publication Number Publication Date
US2116683A true US2116683A (en) 1938-05-10

Family

ID=22315956

Family Applications (1)

Application Number Title Priority Date Filing Date
US107306A Expired - Lifetime US2116683A (en) 1936-10-24 1936-10-24 Coding and decoding machine

Country Status (4)

Country Link
US (1) US2116683A (fr)
DE (1) DE958111C (fr)
FR (1) FR830766A (fr)
GB (1) GB488337A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941036A (en) * 1955-07-23 1960-06-14 Bolkow Entwicklungen Kg Electrical signal scrambling and unscrambling apparatus
US4124311A (en) * 1940-02-05 1978-11-07 The United States Of America As Represented By The Secretary Of The Navy Mechanical movements for coding machines
US4141659A (en) * 1940-02-05 1979-02-27 The United States Of America As Represented By The Secretary Of The Navy Bowden wire substitute mechanism
US4155659A (en) * 1940-02-05 1979-05-22 The United States Of America As Represented By The Secretary Of The Navy Printing and coding machine
US6175625B1 (en) * 1944-12-15 2001-01-16 The United States Of America As Represented By The National Security Agency Control circuits for electric coding machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124311A (en) * 1940-02-05 1978-11-07 The United States Of America As Represented By The Secretary Of The Navy Mechanical movements for coding machines
US4141659A (en) * 1940-02-05 1979-02-27 The United States Of America As Represented By The Secretary Of The Navy Bowden wire substitute mechanism
US4155659A (en) * 1940-02-05 1979-05-22 The United States Of America As Represented By The Secretary Of The Navy Printing and coding machine
US6175625B1 (en) * 1944-12-15 2001-01-16 The United States Of America As Represented By The National Security Agency Control circuits for electric coding machines
US2941036A (en) * 1955-07-23 1960-06-14 Bolkow Entwicklungen Kg Electrical signal scrambling and unscrambling apparatus

Also Published As

Publication number Publication date
FR830766A (fr) 1938-08-09
GB488337A (en) 1938-07-05
DE958111C (de) 1957-01-24

Similar Documents

Publication Publication Date Title
US2211911A (en) Typewriter
US2605879A (en) Automatic typewriter
US2093545A (en) Printing machine
US2116683A (en) Coding and decoding machine
US2116732A (en) Coding and decoding machine
US3289804A (en) Automatic sequence typing mechanism for printing words upon depression of a single key
US2980225A (en) Apparatus to produce printed and control records and to utilize the latter for automatic control purposes
US3030009A (en) Combined typewriter and marking mechanism
US3294117A (en) Selector arrangement for typewriters having fewer operating means than typelevers
US1827362A (en) Printing telegraph system
US2013540A (en) Printing punch
USRE22523E (en) System op coding and decoding
US2765116A (en) Data storing apparatus for business machines, particularly accounting machines or the like
US2285258A (en) Line position control device for paper forms
US1829233A (en) Machine for preparing typewritten copy
GB533143A (en) Keyboard code printer
US970694A (en) Type-setting machine.
US2490476A (en) Printing telegraph system
GB152343A (en) Improvements in printing telegraph apparatus
US3604548A (en) Recording arrangement for typing and punching the same information
US2355297A (en) Perforating apparatus
GB418228A (en) Improvements in or relating to record card controlled printing mechanisms
US1533207A (en) Printing telegraphy
US2082370A (en) Shorthand writing machine
US3022376A (en) Display transmitter