US1802240A - Operating simplex printers in a multiplex system - Google Patents

Operating simplex printers in a multiplex system Download PDF

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Publication number
US1802240A
US1802240A US300570A US30057028A US1802240A US 1802240 A US1802240 A US 1802240A US 300570 A US300570 A US 300570A US 30057028 A US30057028 A US 30057028A US 1802240 A US1802240 A US 1802240A
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US
United States
Prior art keywords
distributor
relay
simplex
segment
relays
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Expired - Lifetime
Application number
US300570A
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English (en)
Inventor
Robert F Dirkes
Vernon R Kimball
James W Long
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Western Union Telegraph Co
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Western Union Telegraph Co
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 Western Union Telegraph Co filed Critical Western Union Telegraph Co
Priority to US300570A priority Critical patent/US1802240A/en
Priority to GB27893/28A priority patent/GB317458A/en
Application granted granted Critical
Publication of US1802240A publication Critical patent/US1802240A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • H04L5/24—Arrangements affording multiple use of the transmission path using time-division multiplexing with start-stop synchronous converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing

Definitions

  • This invention relates to a multiplextelegraph system and in particular to a multiplex system in which simplex printers are operated from a multiplex circuit.
  • An object of this invention is to devise a system whereby simplex printers may be employed for receiving signals on the separate channels of a multiplex transmission circuit.
  • Multiplex telegraph signals are usually made u of six-unit code impulses comprising each c aracter.
  • the simplex printer ref quires, in addition to the character impulses,
  • van object of this invention to devise means for introducing the start and the rest impulses locally at the receiving station.
  • a further object of this invention is to provide means whereby the local start impulse will lnot be transmitted to the printer in case no signal is received over the line for that channel.
  • a furtherobject is to devise means whereby the simplex printer is supplied with steady marking current so long as no signal is being received for the channel in which the printer is located.
  • FIG. 1 is a circuit diagram of the invention applied to a six-unit multiplex telegraph system
  • Figure 2 is a circuit diagram of the invention applied to a six-unit transmitting set
  • Figure 3 is a diagram illustrating the operation of the invention.
  • L1 indicates a telegraph line from which mutiplex signals are received by a receiving relay LR.
  • the tongue of the line relay is connected to the solid ring of a set of receiving rings RR on a multiplex distributor head, which also carries simplex rings SR and local segment rings LS.
  • the upper and lower contacts of the receiving relay LR are connected respectively to ground and to positive battery.
  • Segments 1 to 6 of the receiving rings RR are connected respectively through neutral relays M, N, O, P, Q, and R to positive battery at B..
  • Each of the neutral relays is provided with a contact 3 which closes a holding circuit for the relay from the positive battery at Ba, through the winding of the relay, through the contact' 3, through a cooling resistance, through contact 2 of a release magnet S, to ground at Gn.
  • This' magnet S is also grounded at Gr,J and conl nected at the other terminal to segment 15 on the local segment rings LS.
  • Neutral relays M to R are provided with additional contacts 4 which complete circuits respectively from the positive battery at B.,L to the righthand operating coils 5 of vpolar relays A, B, C, D, E and F.
  • the remaining terminals of the right-hand operating coils 5 are connected together and are connected through a common circuit including the right-hand operating coil 6 of polar relay G to ground.
  • One terminal of each of the left-hand operating windings of polar relays A to G is connected to ground, and the remaining terminals of these coils are connected respectively to segments 18, 21, 24, 4, 6, 9 and 17 of local segment rings LS.
  • the solid ring of local segment rings LS is connected to positive battery as shown.
  • the tongue 8 of polar relay G is connected to segment 12 of local segment rings LS.
  • the neutral relays M, N, P, Q, and R' serve to relay the signals received on the receiving rings RR to the polar relays A to F.
  • the polar relays A to F serve to store the received signal impulses and retransmit them through the simplex rings SR to the simplex printer PR in such a manner' that the time interval for sending one character is spread over the time of one complete revolution of the brushes.
  • Relays G and H serve to determine or control the polarity of the start impulse supplied to the printer by simplex ring SR.
  • Relays K and L are arranged to operate from the simplex rings in accordanceV with the signals furnished to them by polar relays A to F.
  • Relay L is a sending-on relay from which the impulses are transmitted to the simplex printer PR.
  • Relay K is a locking relay which serves to hold the relay tongue on the side on which it was thrown by the received impulse from its own channel while the brush on the simplex ring is passing over the segments of the remaining channels.
  • Local segment rings LS serve'to restore the neutral and polar relays to normal condition after each character.
  • the receiving relay LR is operated by incoming signals and thereby causes the tongue ,of the relay to supply impulses to the receiving segments corresponding to the signals being received. Due to the particular connection of the tongue of relay LR, it will be appreciated that line impulses are repeated by the line relay to the solid ring of the receiving .rings RR. As is well understood by those skilled in the art, the signals are transferred from the solid ring to the receiving segments by the rotating brush associated with the receiving ring. It will also be understood that the brushes of the distributor head are rotated in synchronism with the transmitter at the transmitting station by means well known in the art.
  • the armatures 7 of polar relays A, C and E will be operated to the right-hand position, thereby impressing marking battery upon segments l, 3 and 5 of simplex rings SR.
  • the tongue of polar relay G is also operated to the right-hand position, since the operating coil 6 is connected in series with polar relays A to F, and is operated when one or all of these relays is energized.
  • Relay G therefore actuates the tongue of cut-ofi relay H to the right-hand position when the brush of the local segment rings LS passes over segment 12, thereby placing positive battery upon the start segment 8 of simplex rin s SR.
  • a positive or spacing impulse is transmitted to the printer PR through relays K and L to start the printer operating.
  • the brush associated with local segment rings LS impresses a positive impulse upon segment 15, thereby operating release relay S and opening the holding circuits of neutral relays M, O and Q at contact 2.
  • markin y impulses are transmitted to the printer R as the brush associated with the simplex rings passes over contacts 1, 3 and 5.
  • a negative impulse is transmitted to the simplex'printer to phase the printer mechanism as known by those versed in the art.
  • segment 18 As soon as the marking impulse is transmitted to the rinter from segment 1 of the simplex rings SR, the brush on the local rings LS makes Contact with segment 18 to impress positive battery upon the left-hand winding 9 of polar relay A, thereby operating the tongue of relay A to the left-hand position.
  • segments 21, 24, 4, 6 and 9 are connected to operate the tongues of polar relays B, C, D, E and F respectively to the left-hand position immediately afterv the tr'ansmission of impulses from segments 2, 3, 4, 5 and 6 of thesimplex rings SR.
  • segment 17 is provided for returning ioo relay G to its spacing position after the start pulse has been transmitted.
  • the relay G will remain on its lefthand contact', and the local impulse from segment 12 of the local rings LS will operate the cut-off relay H to the left or spacing position, thereby depriving the start segment 8 of simplex rings SR and the left-hand contacts of relays A, B, C, D, E and F of spacing battery.
  • the tongues of relavs A to F having no battery on them, and the right-hand contact of cut-ofi relay H being also deprived of spacing battery the only available battery on the simplex segments is that on the seventh or rest segment, which supplies marking battery.
  • relay P When the brushes pass over segment 11 of the local rino', relay P is energized and furnishes battery lfor all tongues on the marking busbar.
  • relays A, C and E, and also relay G are actuated and their tongues travel to the right or marking side.
  • Relay G prepares, through its marking contact and tongue, a circuit to the righthand coil of-cut-off relay H.
  • simplex ring segments 1, 3 and 5 are furnished with negative or marking battery, and a circuit is prepared so that on the passage of the local brush over segment 12, relays B, D and F will be furnished with positive or spacing battery, and start segment 8 will be furnished with battery of the same polarity.
  • relay Q is operated, which relay breaks the locking current on make-relay P', which removes the battery from the marking bus-bar of the transmitter.
  • the tape transmitter is now ready to receive the following selection by advancing the perforated tape to the next character selection.
  • make-relay N closes a circuit which energizes transmitter magnet R, and steps the perforated ta e to the next selection.
  • Relay N' bein eld energized long enough for the magnet to be completely built up, is de-energized by the removal of the impressedlocking current through relay O, when the brush passes over local.
  • relays A, B, C, D, E, F and G are returned to their spacing side by reason of the local brush passing over-,segments 18, 21, 24, 4. 6, 9 and 17, The relays are again ready for operation and actuation of their tongues in accordance with the ensuing selection.
  • the next selection sent through the tape transmitter be all spacing, that 1s, with no marking signals, it will of course be necessary to stop the actuation of the simplex printer.
  • all the tongues 7 of relays A to G will be on the left-hand or spacing side, and the impulse from local segment 1:2 now being sent through the lefthand contact of relay G, and through coil D-U, ⁇ throws the tongue of cut-olf relay H to the left.
  • a multiplex transmission circuit for separating the signals into separate channels
  • means in each channel for storing the receivedsignal
  • a simplex printer for each channel
  • means operated by said distributor for supplying the stored signals to the printers during a complete revolution of the distributor.
  • a rotary distributor for separating the signals into separate channels, means in each channel for storing the received signal, a simplex printer in each channel, means operated by said distributor for producing start and rest impulses for the printer, and means associated with said distributor for supplying the stored signals to the rinter during a complete revolution of the istributor.
  • a multiplex transmission circuit in which the signals transmitted comprise equal-impulse code combinations, a distributor for separating the successive combinations into separate channels, means in each channel for storin the received combinations, a simplex rinter for each channel, means controlled y the distributor for producing start impulses for the printers after each combination stored, means associated with the distributor for supplying the stored combinations to the printers, and
  • a multiplex transmission circuit in which signals for the different channels are transmitted in rotation, a receiving distributor for separating the signals into separate channels, means in each channel for storing the received signal, a simplex printer for each channel, means including said distributor for transmitting a start impulse to each printer after a signal is stored, and means including said storing means for preventing the transmission of the starting' impulse When no signal is received.
  • a multiplex transmission circuit in which the signals transmitted comprise equal-impulse code combinations, a distributor for separating the successive combinations into separate channels, means in each channel for storing the received combinations, a simplex rinter for each channel, means controlled y the distributor for producing start impulses for the printers after each combination stored, means associated with the distributor for supplying the stored combinations in each channel to the respective printers during one complete revolution of the distributor, and means controlled by the distributor for transmitting a rest impulse to each printer after the transmission of each combination.
  • a multiplex transmission circuit in which signals for the ditferent channels are transmitted in rotation, a receiving distributor for separating the signals into separate channels, means 1n each channel for storing the received signal, a simplex printer for each channel, means including said distributor for transmitting a start impulse to each printer after a signal is stored, means in each channel and controlled by said distributor for supplying the stored signal to the printer over a complete revolution of the distributor, and means including said storing means for preventing the transmission of the starting impulse when no signal is received.
  • a multiplex transmission circuit in which the signals transmitted comprise equal-impulse code combinations, a receiving distributor for separating the successive combinations into separate channels, a smplex printer for each channel, and local means including said distributor for generating start and rest impulses for each printer.
  • a multiplex transmission circuit in which the signals transmitted comprise equal-impulse code combinations, a distributor for separating the successive combinations into separate channels, means in each channel for storing the received combinations, a simplex printer distributor for producing start impulses for" the printers after each combination stored, means associated with the distributor for supplying the stored combinations in each channel to the respective printers during one complete revolution of the distributor, means controlled by the distributor for transmitting a rest impulse to each printer after the transmission of each combination, and means in each channel controlled by said storing means for preventing the transmission of the start impulse when no combination is stored.
  • the method of controlling a start-stop printing receiver or simplex printer from a continuously rotating commutator or distributing device which consists in controlling the polarity of the start impulse through he medium ofthe code selections.
  • a constant speed distributor having a constantly rotating element
  • a start-stop printing receiver having a start-stop element
  • a multiplex transmission circuit for separating the signals into separate channels, means for storing said impulses for each channel, a start-stop distributor for each channel, the starting of said start-stop distributor being controlled by the intelligence portion of signal selections and a simplex printer for each channel operated from said start-stop distributor.
  • a plua continuously operating rotary distributor for transmitting impulses 'tiger a line in accordance with the positions'of said contacts, means for extending a start impulse to the start segment of said distributor when one or more of the contacts are actuated and means for preventing a start impulse from being transmitted by the rotary distributor in the event that none of the contacts are actuated.
  • a start-stop telegraph system a plurality of tape controlled elements adapted to occupy one position or another depending upon perforations in a tape, a rotary distributor for transmitting impulses over a line in accordance with the positions of the said elements, means for 'extendng a start impulse to the start segment of said distributor when one or more perforations appear in the tape at its operative position, and means for preventing a start impulse from being transmitA ted by the rotary distributor in the event that no pertorations appear in the tape at its operative position.
  • a start-stop telegraph system a plurality of tape controlled elements adapted to occupy one or another position in accordance with perforations in a tape, a rotary distributor for transmitting impulses over a line in accordance with the positions of the tape-controlled elements and means controlled in accordance with the condition of the tape for controlling the transmission of a start impulse by the rotary distributor.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Relay Circuits (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US300570A 1928-08-18 1928-08-18 Operating simplex printers in a multiplex system Expired - Lifetime US1802240A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US300570A US1802240A (en) 1928-08-18 1928-08-18 Operating simplex printers in a multiplex system
GB27893/28A GB317458A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1928-08-18 1928-09-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US300570A US1802240A (en) 1928-08-18 1928-08-18 Operating simplex printers in a multiplex system

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US1802240A true US1802240A (en) 1931-04-21

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US (1) US1802240A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB317458A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911473A (en) * 1952-03-03 1959-11-03 Nederlanden Staat Multiplex wireless telegraph system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911473A (en) * 1952-03-03 1959-11-03 Nederlanden Staat Multiplex wireless telegraph system

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Publication number Publication date
GB317458A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1929-11-28

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