US1593164A - Apparatus for the electric transmission of signs - Google Patents

Apparatus for the electric transmission of signs Download PDF

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Publication number
US1593164A
US1593164A US730210A US73021024A US1593164A US 1593164 A US1593164 A US 1593164A US 730210 A US730210 A US 730210A US 73021024 A US73021024 A US 73021024A US 1593164 A US1593164 A US 1593164A
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US
United States
Prior art keywords
magnet
signs
contact
transmitter
shaft
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
US730210A
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English (en)
Inventor
Ehrhardt Erwin
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens 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
Application filed by Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US1593164A publication Critical patent/US1593164A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4902—Pulse width modulation; Pulse position modulation

Definitions

  • My invention relates to improvements in apparatus for the electric transmission of signs and is particularly suitable for typeprinting telegraphs in which the imprint of the type at the receiver is effected by a type wheel rotating synchronously with the moving parts of the transmitter.”
  • the transmission systems known.
  • my invention consists essentially in the feature that by means of an electro-magnetic coupling rendered operative by the giving of a sign at the transmitter the moving parts of the transmitter and the receiver are each coupled with continuously rotating driving shafts and are each arrested by a locking device when the starting position is reached, which locking device is rendered inoperative simultaneously with the switching in of the coupling magnets and operative with the cutting out of said magnet, the reproduction of the sign transmitted and more particularly the imprint of the type taking place instantaneously at the moving part ofthe receiver when the angular position of the type-wheel corresponding with the sign tobe printed has been reached.
  • FIG. 1 is a sectional side-elevation of the transmitter of i a type-printing telegraph with mechanical locking device
  • Fig. 2 is a section along line II of Fig. 1. and shows the distributing disc in front elevation
  • Fig. 3 shows the locking disc in the released position
  • Fig. 4 shows the receiverof this telegraph system in side elevation
  • Fig. 5 is a section along line II-II of Fig. 4.
  • Fig. 6 is a sectional side-elevation of the transmitter of a type-printing telegraph with an electro-magnet locking device
  • Fig. 7 is a section along llI16(III1-III of Fig. 6,
  • Fig. 8 shows the receiver of this system in side el vation-and Fig; 9 is a section along line IV-IV of Fig, 8.
  • M is the driving motor which during the operation of the system continuously rotates the driving shaft 1.
  • said driving shaft is mounted a pot-shaped magnet 2 which receives its exciting current by means of sliding brushes 3.
  • the shaft 5 to be driven is journaled in bearings 4 and at its front end is mounted an iron coupling disc 6' in such a manner that it firmly adheres'to the potshaped magnet 2 when said magnet is excited.
  • This disc 6 may either be adapted to slide upon the shaft 5 axially while rotating with it or the entire shaft with the fixed half-coupling may have slight axial play in its bearings in order to enable the coupling operations to take place.
  • a disc 8 also shown in side-elevation in Figs. 2 and 3.
  • Said disc is provided with a recess or notch 9 which in the initial position of the transmitter is engaged by a lever 10 with a nose or projection 11.
  • the lever 10 is fulcrumed in a bearing or standard 7 and is controlled by a spring 12 having the tendency to force it against the disc 8.
  • the lever forms the armature of a magnet 13 and carries an insulated contact 14 which when the lever 10 is attracted by its magnets cooperates with a back contact 15.
  • the contacts 14 and 15 also remain closed as long as the nose 11 of the lever 10 rests upon the circumference of the disc 8.
  • a brush arm 17' which rotates above a distribution disc 18;
  • the brush is connected with one conductor L, of the telegraph line by means of a slip-ring.
  • the other conductor L of this line contains the line or main battery BL and is connected with one contact segment 20 of the distributing disc 18. With the other segments 21, 22, 23, 2 1' of the disc are connected the keys 26, 27, 28, 29.”
  • the brush arm 17 is upon an insulated disc 30.
  • the motor M continuously drives the potshaped coupling magnet 2.
  • a key is depressed, for instance the key 26, the lever' 36 is changed over and its tail and moves from the contract 37 to the contact 38.
  • the release magnet 13 now receives the discharge current rush of a condenser 40 which in the position of rest of the lever 36, was charged by the local battery l3 by way of the contact 37.
  • the magnet 13 attracts the lever 10 so that on the one handthe nose 11 is withdrawn from the notch of the locking disc 8 and on the other hand the contacts 14, 15 are closed.
  • the shaft 5 is thus released and the pot-shaped magnet 2 receives exciting current from the battery B..
  • This current is in the first moment the charging current of a condenser the exciter circuit of the coupling magnet 2 is interrupted and the shaft 5 is arrested.
  • the condenser 41 then discharges across its resistance 42 connected in parallel with it.
  • the brush arm 17 has first-passed from the insulating segment 30 to the segment 20 and a current surge is sent from the line battery BL across the two line conductors L L by way of the segment 20 and the slipring 19 which efiects the release of the receiver. A further surge or rush of current takes place as soon as the brush arm 17 sweeps the segment 21 connected with the depressed key 26 which surge eifects the reproduction of the corresponding letter or sign.
  • the receiver consists essentially of a device or mechanism very similar to the trans- 50 insulated upon it.
  • the manner of operation of the receiver is the following: during the first current rush in the line L L passing over the segment 20 of the transmitter the line relay LR is excited for a short period and by attracting its contact lever 51 opens the contact 52 and closes the contact 33.
  • the condenser 40 which had been charged from the battery B while the contact 52 was closed now discharges over the distributing switch 17, the segment 50 and the releaser magnet 13. This magnetreleases the shaft 5 exactly as in the case of the transmitter and closes the contacts 14 and 15 so that the coupling magnet 2 receives current and couples the shaft 5 with the motor shaft 1.
  • the brush arm 17 then passes on to the distributing ring 49 connected with the printing magnet 45 and in the moment in which the second sign surge of the transmitter takes place (in the case mentioned across the segment 21), the line relay LR is again excited and the discharge current rush of the condenser 40 passes across the lever 51, contact 53, brush arm 17 ring 45.
  • the latter knocks the hammer 45 against the paper tape 44 and the type wheel 43 so that the sign given at the transmitter is imprinted on the tape.
  • said shaft is arrested at the locking disc 8 by means of the locking lever 10, 11 in exactly the same manner as at the transmitter.
  • Fig. 6 which shows a typeprinting telegraph apparatus in sectional side-elevation in which the locking or arrest ing mechanism is operated electro-magnetically
  • Fig. 7 which is a transverse section along the line TIL-III of Fig. 6 and shows the distributing disc in front elevation
  • M is again the motor which continu-- ously drives the shaft 1 on which the potshaped coupling magnet 2 is mounted
  • the armature disc 55 mounted on the shaft 5 is effected on the one hand by the coupling magnet 2 and on the other hand by the stationary brake magnet 56.
  • the disc armature 55 is again adapted to slide axially upon the shaft 5 or the shaft 5 is axially movable to such an extent that the armature 55 can come in contact either with the pot shaped magnet 8 or the brake magnet 56.
  • Upon the shaft 5 are mounted brush arms a ass 57 which carry insulated brushes 58, 59 of whichv the brush 58-is connected by means of a sliding brush 60 with one pole of the local battery B and the brush 59 by means of a sliding brush 61 with one branch L, of the line.
  • the outer comprises a contact segment 62 in the initial position of the brush and an annular contact 63 connected with the terminal of the coupling. magnet 2.
  • the inner contact ring comprises a release contact segment next to the insulated initial position of the corresponding contact brush 58.
  • "Its further sign contacts 21 to 24 are connected with the printing keys 26 to 29 the con struction of which corresponds with that operative position of'the 38 through the coils of shown in Figs. 1 and 2.
  • a modification as compared with the first example consists in the feature that instead of the release ma net a change-over magnet is provided here across the'contacts 66 or 67 of which either the coupling magnet 2 or the brake magnet 56 is excited.
  • the manner of operation of the transmitting mechanism is the following: in the inoperative position the brake magnet 56 r'eceives current from the battery B sliding brush 60, contact brush 59, segment 62', back contact 67 of the magnet 65 and a resistance 69 connected in parallel with the condenser 68.
  • the key rail 35 changes the key lever 36 over against the contact 38 so that the discharge current rush of the con denser 40, which had been charged in the inthe contact 37, flows by way of the contact a magnet 65.
  • This magnet sharply attracts its armature 70 and thus interrupts the exciter circuit 'of the.
  • the brake magnet 56 at the contact 67. Simultaneously it closes -at the contact 66 the circuit of the coupling magnet 2 which includes the distributing brush 59, the back contact segment 62, armature 70, contact 66, excite;- coil 2, condenser 41 and the battery B so that first a strong charging current surge is produced at the condenser which is later on followed by a weaker holding current across the resistance 42.
  • the shaft 5 rotates and the contact brush 59 passes on to the ring contact 63 so that the holding circuitfor the coupling magnet remains closed.
  • the brush 58 first passes on to the release segment 20 so that a current surge takes place from the line battery BL acrossthe line conductors L L as in the first described example.
  • the distributor 71 is shown in front elevation in Fig. 9 which is a cross section along the line IV-IV of Fig. 8. It consists of two ring contacts 72, 73 the former of which is pro- .vided with an insulating segment 75 in the starting position while the latter ring 73 1s furnished with a conducting part 74 for this position. nected with each other and by means of a sliding brush 78 with the local battery B This circuit is controlled by the line relay LR the armature 80 of which operates two pairs of contacts 81, 82 and '83, 84.
  • continuously revolvin driving shafts at the transmitter and at t e receiver stations mechanism for transmitting signs at the transmitter station comprising a driven shaft, mechanism for receiving and reproducing said signs at the receiving station comprising a driven shaft, an electro-magnetic coupling for connecting said transmitting and said receiving mechanism with said continuously revolving shafts, a brake magnet mounted upon said driven shaft at the transmitter and receiver station and a change-over magnet at each of said stations adapted to lead the exciter current either over said brake magnet or said coupling magnet.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Toys (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
US730210A 1923-08-08 1924-08-05 Apparatus for the electric transmission of signs Expired - Lifetime US1593164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE220323T 1923-08-08

Publications (1)

Publication Number Publication Date
US1593164A true US1593164A (en) 1926-07-20

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US730210A Expired - Lifetime US1593164A (en) 1923-08-08 1924-08-05 Apparatus for the electric transmission of signs

Country Status (3)

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US (1) US1593164A (fr)
FR (1) FR585343A (fr)
GB (1) GB220323A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2672067A (en) * 1950-02-02 1954-03-16 Marjorie B Hansell Electromechanical controlling and counting system
US2683514A (en) * 1950-11-20 1954-07-13 Flight Res Inc Synchronous control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2672067A (en) * 1950-02-02 1954-03-16 Marjorie B Hansell Electromechanical controlling and counting system
US2683514A (en) * 1950-11-20 1954-07-13 Flight Res Inc Synchronous control device

Also Published As

Publication number Publication date
GB220323A (fr) 1925-11-09
FR585343A (fr) 1925-02-25

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