US2512734A - Signal transmitting apparatus with coding wheels - Google Patents

Signal transmitting apparatus with coding wheels Download PDF

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Publication number
US2512734A
US2512734A US29813A US2981348A US2512734A US 2512734 A US2512734 A US 2512734A US 29813 A US29813 A US 29813A US 2981348 A US2981348 A US 2981348A US 2512734 A US2512734 A US 2512734A
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Prior art keywords
lever
bar
hand end
code disc
code
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US29813A
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English (en)
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Beccio Giuseppe
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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
    • 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
    • G09C1/06—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 wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member
    • G09C1/10—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 wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member the connections being electrical
    • G09C1/12—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 wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member the connections being electrical comprising contact-bearing permutation discs

Definitions

  • the present invention relates to signal transmitting apparatus having a coding device of a known type, briefly outlined hereinafter, and designed to code the signals transmitted at the transmitting station and to decode them at the receiving station.
  • the said coding device includes a set of wheels or code discs having pins on one side of each code disc, said code discs being associated with the levers acting on the signal transmitting means in such a way that the polarity of the impulse which is transmitted will or will not be inverted, according to the position of the pins in respect to the said levers and according to the prevailing position of the transmitting means.
  • the inversion of the polarity thus obtained determines the coding.
  • the object of the present invention is to provide a device for advancing the code discs in a signal transmitting machine, in which the coding is performed in the manner set forth above.
  • the means which effect the advancement of each code disc carry a disengagement member or disabling member which is subject to be operated by the pins of the following wheel so as to determine the disengagement of the said means from the associated code disc.
  • each code disc depends on the presence or absence of a pin of the following code disc along a fixed generatrix.
  • Fig. 1 is an illustration of the invention as embodied in a coding and decoding device applied to a start-stop printing telegraph apparatus operating on the so-called five unit alphabet, wherein the signals transmitted and received are represented by a series of five impulses,
  • Fig. 2 is a fragmentary perspective View illustrating two adjacent code discs and advancing members associated with said :code discs, and
  • Fig. 3 is a fragmentary perspective view similar to that shown in Fig. 2, wherein, however, the elements are in a different position.
  • FIG. 1 illustrates the sender, the coding device, the decoding device and the receiver related to a single impulse.
  • I is a transmitting combination bar which by the depression of a key lever 2 is longitudinally movable into its right hand or left hand end position.
  • a bell-crank lever 4 On the bar I there is pivoted at 3 a bell-crank lever 4, the upper arm of which cooperates by means of a pin and slot connection 5 with a lever Ii swingably mounted at 'l.
  • the lever B is urged in a, clockwise direction by a spring I9 whereby in the position shown in Fig. 1 the end portion 8 of the lever 6 is held in contact with one of the controlling pins-9 projecting from one side of a wheel or code disc I0 loosely mounted upon a shaft II and prevented from moving by a latch I2.
  • Each code disc I0 is divided into an equal number of parts, for example twenty-six; each division corresponds to a tooth and is marked with a letter'of the alphabet which can be read through a window in the cover 51.
  • the lower arm of the bell-crank lever 4 is movable into the path of the projection II of a lever I3 pivoted at I4 and urged in a clockwise direction by its spring I5.
  • the lever I3 cooperates with the cam I6 mounted upon the transmission shaft well known in any start-stop printing telegraph apparatus.
  • the lower arm of the lever I3 controls the transmission contact I8.
  • the lever 4 is further rocked in a counoer-clockwise direction so that its lower arm will be out of the path of the projection H on the right hand side of the latter.
  • the lever I3 is permitted to rotate and to close the contact I8.
  • the impulses transmitted by'the contact I8 arrive at the electromagnet'2l of the receiving mechanism.
  • the first impulse is a start-impulse which will never be coded; in the case of the present machine it is an interval.
  • is de-energized and the armature 22 pivoted at 23 and urged in a clockwise-direction by its spring 24 rocks clockwise till it-contacts the'pin 25 secured to the machine frame.
  • the lower arm 42 of the lever 3i cooperates with a lever 38 pivoted at 39 and urged in a clockwise direction by its-spring.
  • the lower arm of the lever 38 acts upon the selectingbar 43 by means of a spring "44 tensioned between said arm and said selecting bar.
  • the cam 23 mounted on the receiving shaft is able'to swing the lever 38 in a counter-clockwise direction during a cycle of said shaft.
  • the five impulses representing the signal arrive at the electromagnet 2
  • the first impulse following said start-impulse is transmitted when the-end 8 of the lever 6 contacts a pin -9 of the code disc II! and when the bar I is in its left hand end position. Therefore, the first impulse will be a positive one which energizes the electromagnetZl so that the armature 22 is swung upwardsdnto the'position shown in Fig. l.
  • the electromagnet will be deenergized, the armature 22 will rock in a clockwise direction so that during a cycle of the cam 26 the projection 28 will be prevented from moving by the upper portion of the bent-over frame being in its path.
  • the lever 38 will not be engaged in its rocked position and the selecting bar 43 will be restored into its left hand end position.
  • a selecting bar 43 is in its left hand end position when a transmitting combination bar I is in its right hand end position.
  • the lever 38 will not be engaged in its rocked position and the selecting bar 43 will be restored into its left hand end position.
  • a selecting bar 43 is positioned in its left hand end position when a transmitting bar I is in its right hand end position.
  • will be deenergized and the armature 22 will rock clockwise.
  • the opening 21 will lie in the path of the projection 28 which will be permitted to pass.
  • the lever 38 will be engaged in its rocked-position and the selecting bar 43 will be moved to its right hand end position by thev spring 44.
  • a selecting bar 43 is in its right hand end position when a transmitting combination bar I is in its left hand end position.
  • the said combinations have to be varied at each signal; it is sufficient that the pins 9 do not move from thebeginn'ing of the is determined horizontally by the position of the pivot 30 carried by the lever 3
  • is stopped by the engagement of its lower end 42 with the uppermost step of the lever 38, while the pin 32 slides in the slot of the lever 33 which remains in its position.
  • a cam (not shown) mounted on the receiving shaft carrying the cams 26 and 41 acts on a projection (not shown) arranged at the right hand side of the lever 3
  • a special device which in the case of the start-stop printing telegraph is the cam 41 mounted upon the shaft carrying the receiving cams pushes upwards the lever 48 pivoted at 49 and urged in a counterclockwise direction by the spring 50.
  • lever 54 On the lever 48 along the axis there are pivoted a number of advancing members or levers 54, 54a equal to the number of code discs I0.
  • a lever 54 by means of its tooth 53 engages a tooth of the associated code disc in (see Fig. 2), this code disc will be advanced one step.
  • the code disc II) is then held'in the new position by the latch I2 (Fig. 1).
  • the lever 54 has a projection forming a disabling member or lug 55 which lays in the path of the controlling pins 9a of the following or adjacent code disc Illa.
  • the last code disc of the set of code discs l0, Illa will always rotate one step during each cycle of the cam 41 because no code disc follows, so that there are no pins which can act on the disabling member or lug arranged on the last advancing member or lever.
  • the advance- 7 ment of all code discslfl, lfl'a except the'last one is affected by the pins of the following wheel, so that the rule by which each code disc acts on the levers 6 and 33 does not only depend on the position of the pins 9 that it carries, but also on the position of the pins 9 of all the following code discs.
  • the last code disc of the set advances one tooth during each cycle of the cam 41 it is advisable, in order to make more complex the rule,
  • the set of code discs on the two machines which are connected should be in the same position. This can be determined by reading through the window in the cover 51 of the two machines, the same group of letters of the alphabet. This group of letters constitutes the key.
  • the device has been described as applied to printing telegraphs in order to make it easier to be understood; nevertheless it can also be applied to any coding mechanism in which each signal is formed by a certain number of elements and where it is not necessary that the machines be connected electrically.
  • a coding machine can prepare a perforated tape by means of a perfo-' rating mechanism fitted in place of the transmission switch so that the holes will correspond to the coded signal.
  • the tape will be sensed by appropriate sensing means, fitted in the place of the receiving mechanism and adapted to act upon the printing mechanism of the machine.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Transmission Devices (AREA)
  • Toys (AREA)
US29813A 1947-05-30 1948-05-28 Signal transmitting apparatus with coding wheels Expired - Lifetime US2512734A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT667665X 1947-05-30

Publications (1)

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US2512734A true US2512734A (en) 1950-06-27

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ID=11298729

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Application Number Title Priority Date Filing Date
US29813A Expired - Lifetime US2512734A (en) 1947-05-30 1948-05-28 Signal transmitting apparatus with coding wheels

Country Status (4)

Country Link
US (1) US2512734A (fr)
DE (1) DE948647C (fr)
FR (1) FR966872A (fr)
GB (1) GB667665A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765364A (en) * 1950-10-05 1956-10-02 Hagelin Boris Caesar Wilhelm Keying mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2394765A (en) * 1939-07-12 1946-02-12 Hagelin Boris Caesar Wilhelm Ciphering and deciphering mechanism

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1683072A (en) * 1928-09-04 Electric code machine
DE579555C (de) * 1928-11-17 1933-07-03 Chiffriermaschinen Akt Ges Chiffriervorrichtung mit Chiffrierwalzen
BE390250A (fr) * 1932-08-05 1932-09-30
US2373890A (en) * 1938-10-03 1945-04-17 Internat Code Machine Company Cipher machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2394765A (en) * 1939-07-12 1946-02-12 Hagelin Boris Caesar Wilhelm Ciphering and deciphering mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765364A (en) * 1950-10-05 1956-10-02 Hagelin Boris Caesar Wilhelm Keying mechanism

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Publication number Publication date
DE948647C (de) 1956-09-06
GB667665A (en) 1952-03-05
FR966872A (fr) 1950-10-20

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