US1414496A - Cryptographic typewriter - Google Patents

Cryptographic typewriter Download PDF

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Publication number
US1414496A
US1414496A US403123A US40312320A US1414496A US 1414496 A US1414496 A US 1414496A US 403123 A US403123 A US 403123A US 40312320 A US40312320 A US 40312320A US 1414496 A US1414496 A US 1414496A
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United States
Prior art keywords
typewriter
primary
series
typewriters
contact
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Expired - Lifetime
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US403123A
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English (en)
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Beyer Peter Georg Grove
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Individual
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Individual
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    • 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

  • the present invention relates to a cryptographic machine for simultaneous writing of messages or the like with ordinary and with
  • the object of the invention is to provide a machine of this kind by which it becomes feasible to write down, at the senders pla-ce, a message in cryptographic alphabet ⁇ which can be read only by the receiver by copying it in another writing machine, which is arranged exactly in accordance with the one used at the senders place. This result is attained by the provision, in
  • the selection, through the distributer, of keys in the secondary typewriter is performed by means of a cam disc whose periphery is fitted with a number of projections and which is turned forward a certain distance for each depression of a key on the primary typewriter.
  • Fig. l shows diagrammatically a vertical transverse section of the two typewriters built together, some of the parts thereof being shown, for the sake of clearness, in other positions than those in which they are placed on the machines scale relatively to those,
  • nFig. 5 is a plan view of a complete machine constructed in accordance with the present invention.
  • roller in the. secondary typewriter which roller with the parts-belonging thereto may be connected to the roller J in suitable manner and may be moved in perfect synchronism with the roller J.
  • M are the type levers belonging tothe secondary typewriter and N their pivot.
  • the free ends o the type levers M are connected to connecting rods Ii which are connected, at their opposite ends. to pivoted arms 2, which are supported h v an angle iron 3.
  • 4' are spring-actuated levers which tend to maintain the keys l" in the striking position.
  • the distributer consists of a frame having two side bars 6 and 7, each carrying -a series of contact strips or leaves, designated 8 and 9 respectively.
  • the strips 8 and 9 are arranged in pairs opposite each ot-her, that is to say, each strip 9 of the bar directly in alignment with a strip 8 of the bar 6.
  • Each contact strip ⁇ 9 is electrically connected through the current reverser B with'the movable switch member A, which, as hereinbefore stated, is adapted to be 0perated bythe projection or lug 5 carried by a.
  • each of the key levers is provided vwith a similar lug for operating a similar switch member A into contact with a fixed switch member' in electrical connection with one pole of the battery E or other source of current.
  • Each oit the contact strips 8 issimilarly connected throughtlie current reverser B and through the coil of an elec- I tro-mavnetfD witlitthe other pole of the bat.-
  • a sliding carriage 10 is provided, which carriage' constitutes a contact panel or bridge, and carries along each lon itudinal edge a series of contact strips or laminations, 11 and 12, adapted to contact respectively with the contact strips 8 and 9 of the bars 6 and 7, said strips 11 and 12 being arbitrarily interconnected by means of cross connecting wires 13.
  • the carriage v1() is constantly urged Jin one direction by a helical spring 14, (see Fig.
  • the disc U is 'of letters.
  • That'the carriage 10 is moved to one or the other side depending on its extension bearing against a-more or less projecting portion to one of the contact strips 9, and through a contact strip 12, wire 13, contact strip 11, strip 8, reverser B, electromagnet 'D, and back to the battery, whereby a typebar of the secondary typewriter is operated.
  • .contact panel reverser B of the receiving machine must be turned 90 relatively to that of the transmitting machine.
  • the message received is now copied on the roller J of the receiving machine exactly as it appears on the paper received.
  • the primary typewriter must bev operated so as to produce on the paper carried by its roller J a duplicate of the unintelligible message, which message willbe so transferred by means of the circuits above described to the paper carried by the roller 0 of the secondary typewriter of the receiving machine as to produce an exact duplicate of the intelligible message as it was originally written on the primary typewriter of the transmitting machlne.
  • the carriage l0 and disc U are interchangeable with corresponding parts of different shape and construction, and the condition, for correspondence is therefore that the ciphering machines of, the sender and the receiver should have exactly the Same carriage 10, as well as exactly t-lie same cam. disc U,and that sender and receiver have mutually agreed as to how the disc ⁇ U is to be placed at the commencement of the ciphering and deciphering respectively.
  • the carriage 10 may be composed of shorter sections superimposed on each other in the shape of a block, whereby the length becomes shorter.
  • a sliding carriage 10 with crossconnected panel instead of a sliding carriage 10 with crossconnected panel use may be made of a rotary roller on which a cross-connected contact panel is arranged in corresponding manner.
  • this motion may be effected by either of the typewriter carriages,
  • the device is simplified somewhat, as it will then be unnecessary to have a special set of bars for each key in order to transmit this motion lVhen the source of current is removed from the writing machine, the latter may be used as an ordinary typewriter.
  • two typewriters may be placed together, the keys of the secondary typewriter being actuated in similar manner to the type levers of the above described construction, while the rollers should be interconnected as described above.
  • a cryptographic apparatus comprising-,in combination, a primary typewriter and a secondary typewriter, said'typewriters being adapted for synchronous operation, the primary typewriter being adapted to be manually operated, electrically operated means between said typewriters, and operable on the operation of said primary typewriter for operating the secondary typewriter, and means operatedby said primary typewriter for irregularly and arbitrarily selecting the typebar of the secondary typewriter to be operated on the operation of the primary typewriter.
  • a cryptographic apparatus comprising, in combination, a primary typewriter and a secondary typewriter, said typewriters being adapted for synchronous operation, the prmary typewriter being adapted to be manually operated, electrically operated means between said typewriters and operable on the operation of said primary typewriter for operating the secondary typewriter, said electrically operated means including a series of stationary contact members for the keys of .each of Ysaid typewriters and a member slidable between said series and having a series of contact members for each of said stationary series, the contacts of one of said slidable series being arbitrarily connected with the contacts of the othe slidable series, and means operated by said primary typewriter for irregularly sliding said slidable member thereby to select a typebar of they secondary typewriter to be operated on the operation of the primary typewriter.
  • a cryptographic apparatus comprising, in combination, a primary typewriter and a secondary typewriter,said typewriters being adapted for synchronous operation, the primary typewriter being adapted to be manually operated, electrically operated means between'said typewriters and operable on the operation of said primary typewriter for operating the secondary typewriter, said electrically ⁇ operated means including a series of stationary contact members for the keys of each of said typewriters and a member reciprocable between said series and having a series of contact members for each of s aid stationary series, the contacts of one of said reciprocable series being arbitrarily connected with the contacts of the lother reciprocable series, and vmeans operated by said primary typewriter for irregularly moving sald reciprocable members thereby to select a typebar of the secondary typewriter to be operated on the writer.
  • a cryptographic apparatus eomprising
  • a primary typewriter and a secondary typewriteraid typewriters being adapted for synchronous operation, the primary typewriter being adapted to be manually operated, electrically operated means between said typewriters and operable on the operation of said primary typewriter for operatin the secondary typewriter, -said electrica y operated means including a series-:of stationary contact members for the keys :of each of said typewriters and a member slidable between sald'series and having a serles of contact members for each of said Stationary series, the contacts of one of said :to be operated on the operation of the pr1- mary typewriter.
  • Aeryptographc apparatus comprising, 1n combination, a primary typewriter and a secondary typewriter,v said typewriters being adapted for synchronous eperation,'the primary typewriter being adapted to be manually operated, electrically operated means bef tween said' typewriters and operable on the leperatipn'of said rimary typewriter for operating the secon ary typewriter, said elec- 'tricallyi operated means including a series of stationary contact' members for the keys of each ofsaid typewriters and a member reciprocable between said series and having a series of contact members for each of said stationary series, the contacts of one of said neciprocable series being arbitrarily connected with the contacts of thev other reciprocable series, a rotatable cam disk operable by said primary typewriter and having a periphery adapted lto transmit an irregular sliding movement to said reciprocable member in "one direction, and flexible means for retaining the reciprocable member is .contact with sald cam

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US403123A 1919-08-26 1920-08-12 Cryptographic typewriter Expired - Lifetime US1414496A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK26710T 1919-08-26

Publications (1)

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US1414496A true US1414496A (en) 1922-05-02

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US (1) US1414496A (da)
DE (1) DE336669C (da)
DK (1) DK26710C (da)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425518A (en) * 1944-01-11 1947-08-12 Ibm Ciphering apparatus
US2529487A (en) * 1944-03-13 1950-11-14 Vernon E Cooley Rotor assembly
US2964856A (en) * 1941-03-10 1960-12-20 Albert W Small Method of and apparatus for cryptography
US2984700A (en) * 1944-09-22 1961-05-16 Albert W Small Method and apparatus for cryptography

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974447C (de) * 1943-05-15 1960-12-29 Normalzeit G M B H Verschluesselungsgeraet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2964856A (en) * 1941-03-10 1960-12-20 Albert W Small Method of and apparatus for cryptography
US2425518A (en) * 1944-01-11 1947-08-12 Ibm Ciphering apparatus
US2529487A (en) * 1944-03-13 1950-11-14 Vernon E Cooley Rotor assembly
US2984700A (en) * 1944-09-22 1961-05-16 Albert W Small Method and apparatus for cryptography

Also Published As

Publication number Publication date
DK26710C (da) 1920-09-27
DE336669C (de) 1921-05-07

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