US2233346A - Telegraph system - Google Patents

Telegraph system Download PDF

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Publication number
US2233346A
US2233346A US106904A US10690436A US2233346A US 2233346 A US2233346 A US 2233346A US 106904 A US106904 A US 106904A US 10690436 A US10690436 A US 10690436A US 2233346 A US2233346 A US 2233346A
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lane
relay
transmitter
transmitters
brush
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US106904A
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English (en)
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Jr Philo Holcomb
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Western Union Telegraph Co
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Western Union Telegraph Co
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Priority to US106904A priority Critical patent/US2233346A/en
Priority to GB27698/37A priority patent/GB499905A/en
Priority to FR828081D priority patent/FR828081A/fr
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Publication of US2233346A publication Critical patent/US2233346A/en
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers

Definitions

  • This invention relates to signalling or telegraph systems and more particularly to systems of this character employing expanding channels.
  • the object of the present invention is to provide a signalling or communication system of the expanding channel type embodying repeaters, the present application being a continuation in part of said prior application disclosing one form of repeater.
  • Another object of the invention is to provide a telegraph or signalling system wherein the expanding channels utilize two lanes of traffic in series or a lane of traflic in series relation with an ordinary wire, carrier channel, radio channel or the like.
  • Another object of the invention i to provide a system of the above-mentioned character in which the transmission rates over series channels or lanes may be different, depending upon the character of the channels and the variations in trafiic, in order to utilize the channels efficiently.
  • a further object of the invention is to provide a system having a lane of traflic of which one or more of the expanding channels receives signals from or transmits into another lane or lanes of traffic, the expression lane of traflic being defined as the medium over which signalling is accomplished; among other things a "lane of traffic may be comprised of one or more of the following elements: a wire, a cable strand, a multiplex channel, a side of a duplex or quadruplex, a superimposed circuit, a radio or high frequency carrier channel or the like.
  • an expanding channel is a sub-channel that utilizes a part or all of a lane of traflic, for example a single channel of a multiplex system,
  • a still further object of the invention is to 65 provide a system of the character described employing a repeater or a plurality of repeaters in connection with expanding channels.
  • a still further .object of the invention is to provide a telegraph system having an expanding channel and a sending device, such as a trans- 5 mitter, or a receiving device, such as a printer, operatively associated therewith and adapted to operate at a rate differing from the rate of transmission of the signals of said sending or receiving device over said channel.
  • a sending device such as a trans- 5 mitter
  • a receiving device such as a printer
  • Fig. 1 is a diagrammatic view of the general arrangement of the system.
  • FIGs. 2 and 3 taken together, show the detailed circuits of the system shown in Fig. 1.
  • a telegraph system embody- 20 ing the invention comprises a plurality of separate exchanges l0, II, II and I3, which may be located, for example, in New York, Albany, Chicago and Boston, respectively.
  • exchange l0 is connected to exchange H by "East and West lanes of traffic, of which the No. 1 East traflic lane is indicated at M and the No. 1 West traflic lane is indicated at I5, said lanes utilizing any available communication medium, such as channels of a multiplex (or any other suitable channels or circuits including carrier or radio channels).
  • the character of the lane of traflic utilized by each expanding channel is immaterial.
  • Exchange H is also connected to exchange l2 by lanes of traflic l6 and I1, and to exchange ill by lanes of traific l8 and I9.
  • communication between exchanges l0 and I2 or between exchanges :l0 and I3 may be effected by utilizing two or more expanding channel lanes of trafilc in series relation or an expanding channel lane of traflic in series relation with a lane of any ordinary circuit or channel by employing repeaters at the exchange H or another intermediate point or points at which available traffic lanes terminate.
  • a sending device such as a code transmitter Ta at exchange I0 is arranged to control a receiving device, such as a printer at exchange l3 through the lanes of traifi'c ll and IQ of an expanding channel system and a repeater a at the intermediate exchange II;
  • a sending device such as a code transmitter Tb at exchange l0 is arranged to control a receiving device, such as a printer 20 at a branch oflice adjacent exchange H through an expanding channel oi the lane of traflic l4; and sending devices such as code transmitters To and Td at exchange I.
  • transmitters Te, Tf and Ty at exchange I3 and transmitters Th, Ti, and T1 at exchange l2 are arranged to transmit over the lanes of trafllc I5, 16, l1, l8 and I 9, the respective channels including repeaters e, j, g, h, i and 9" at the exchange II.
  • a complete system includes a large number of exchanges and apparatus units, and in many instances the lanes of traffic would accommodate a large number of sub-channels, and the printers or receiving devices would be operated over channels or circuits consisting of more than two series trafiic lanes.
  • any two telegraph stations may be provided with the equivalent of a direct line or connecting channel without selective switching of transmission circuits even though the connecting circuit includes a plurality of separate channels terminating intermediate the transmitting and receiving stations, as in the case of the transmitter Ta in New York described above which is connected to a printer in Boston through a circuit extending from New York to Albany and a second circuit extending from Albany to Boston.
  • the repeaters which are described in detail hereinafter, are preferably storage repeaters of such character as to be capable of storing the message signals at one rate and repeating the same at a diiierent rate in order that the rates of transmission in different parts of the system may vary, for example to utilize the channels or telegraph equipment at maximum efiiciency.
  • the system is not limited to repeaters of this character.
  • printer or facsimile signals may be transmitted over the channels and that the invention may be utilized in other signalling systems.
  • each transmitter has an insulated spacing bus bar S and a marking bus bar M connected to positive battery through the winding 38, 3
  • each transmitter is connected through the windings 33' of a common relay bank 34 to ground.
  • the armatures of relays 34 are connected to segments l and II, land l2, 3 and I3, 4 and I4, and 5 and 15, respectively, of transmitting ring 39 of a multiplex transmitting distributor 'IDlv associated with a line conductor LI, said segments forming two channels of the distributor.
  • the expanding channels are arrangedin this instance to utilize a lane of traflic formed by two channels of the multiplex associated with the line Ll.
  • the solid ring 48 of the distributor 'I'Dl is connected to the apex oi the windings of the differ-- ential line relay LRI oi the terminal duplex set of line LI in accordance with usual practise.
  • the transmitting rings 39 and 40 and the local rings 44 and 45 of the distributor are bridged by the rotating brushes 4
  • the ring 46 contains local segments 46, 41, 48 and 48 in connection with the multiplex channels allotted to relay bank 34. The remaining multiplex channels may be utilized for other expanding channels or for.
  • Local segments 46 and 48 are connected in parallel through a resistance 50 and the windings 35 of relay bank 34, the latter windings being poled so as to restore the contacts to normal or spacing positions each time a local pulse is received from the local ring 45.
  • the control apparatus for each transmitter Ta. Tb and To is identical and therefore it is only necessary to consider that associated with one of said transmitters.
  • the tape transmitter Ta has a stepping magnet connected to the midpoint of the windings of a difierential relay 56.
  • the other terminals of the windings oi. relay 56 are joined through the auto-control contacts 51 of the transmitter and the break contacts 58 of said relay to contact 59 of relay Ra.
  • the inner armature of relay 56 associated with contacts 58 is grounded and the outer armature is connected through the operating winding 68 of relay Se and thence to the left hand contact 6
  • Relay Sav has a locking winding 65 connected in series with a holding winding 66 of polar relay Qa to the local segments 46 and 48 of the transmitting distributor TDI.
  • Relay Qa is also provided with an operating winding 61 connected in series with operating and restoring windings 68 and 69, respectively, of relay Ra.
  • the opposite terminal of winding 68 is connected to the left hand contact 10 of relay Ru and the opposite terminal of winding 69 is connected to local segments 41 and 49 of the distributor.
  • a transmitting mixer TM I is common to all of the transmitters and has segments II, 12 and 13 each individual to one of the transmitters and connected to the upper armatures of relays Qa, Q1) and Q0, respectively.
  • the solid ring 14 01' the transmitting mixer TMI is connected to ground through the release magnet 15.
  • a sending clock SC common to all of the transmitters is provided,
  • said sending clock having two segments 88 and 8
  • the transmitting mixer TMI and sending clock SC each comprises a rotary brush carrier provided with brushes 1! and 81 bridging their respective sets of contact segments and a number of equally spaced stop arms, equal in number to the number of transmitters of the expanding channel system, controlled by release magnets 15 and 8,8.
  • the brush carriers are rotated in any suitable manner, as by frictional driving connections with the driving motor of the multiplex distributor TDI'.
  • the purpose of the transmitting mixer TMI is to render operative in succession the transmitters which have characters or signals to send so as to transmit successive characters from each of the busy transmitters over the lane of trafiic.
  • the purpose of the sending clock SC is to time the entry of an idle transmitter as soon as it has message characters to send, this event necessarily occurring simultaneously with the entry of a printer or repeater on the receiving side of'the lane of traflic.
  • the release magnet 88 of the sending clock SC is connected to local segments 41 and 48 whereby the brush carrier of the clock is stepped twice during each revolution of the distributor brushes whereas the movement of the brush carrier of the mixer TMI is non-uniform and depends upon the number of transmitters which are busy at any instant.
  • the circuit connected to segment 41 includes windings of relays Ra and Qa but this circuit is open at this time at the left hand contact of relay Ra.
  • the transmitting segments I l-l5 of the multiplex channel associated with the transmitters Ta, Tb, etc. are connected to the line Ll, thus sending the combination set up on the relay bank 34 by the transmitter Ta.
  • the code set up in the relay bank 34 is sent over the line.
  • onto local segment 46 or 48 of the distributor restores the armatures of the relay bank 34 to spacing, thus setting up a blank or all spacing signal on the transmitting segments of the distributor TDI.
  • of the transmitting mixer TMI steps the brush carrier of the mixer to segment 12 but does not release the feeler pins of the transmitter Ta since, as described above, the stepping magnet 55 of the transmitteris locked up through the inner armature of relay 56. Consequently the spacing combination remains on the segments of the multiplex distributor and as the transmitting brush of the distributor engages the next channel allotted to the transmitters Ta, Tb, etc., the spacing combination is transmitted to the line.
  • this spacing combination is to close out the printer, repeater or other receiving device, at the receiving station which is associated with the transmitter Ta. Since none of the feeler pins of the transmitter Ta is permitted to actuate the transmitter contacts to marking potential at this time, the restoring circuit for "engagesthe local segment 41 or 49, a circuit is completed from ground at the armature of relay Ra, through the contact 10, the winding 68 of relay Ra, the winding 61 of relay Qa, the winding 69 of relay Ra, to the local segment 41 or 49 connected to battery through the local brush 4
  • the windings 68 and 69 of relay Ra are in opposition to each other but the winding 68 predomi nates as long as the distributor brush is on segment 41 or 49, the polarity of said windings being such as to maintain the armature of the relay in engagement with the contact 18.
  • the condenser 95 discharges through winding 68 restoring the armature of relay R'a into engagement with the right hand contact 59.
  • the current through winding 61 of relay Qa actuates the armatures of this relay into engagement with their left hand contacts, thus applying battery through the upper armature and left hand contact 93 of relay Qa and the segment ll of the transmitting mixer TMI. to the release magnet 15 to release the brush carrier of the mixer. Battery is also applied to winding 60 of relay Sa at the lower armature and contact 6
  • the transmitter Ta is thus closed out since upon each subsequent revolution of the brush 11 of the transmitting mixer TMI, the brush passes directly over the segment 1
  • the other transmitters are closed out in a similar manner when the supply of tape is exhausted and their respective auto-control contacts are opened.
  • the sending clock SC performs no function during the normal operation of the transmitters nor in the closing out of a transmitter in service but acts to time the re-entry of a transmitter when the transmitter is ready to transmit to the line as indicated by the reclosure of the autocontrol contacts.
  • the release magnet 88 of the sending clock is connected directly to the local segments 46 and 48 of the multiplex distributor so that it is stepped twice during each revolution of the distributor and at no time is the release magnet continuously energized to move past a normal stopping position without stopping as in the case of the transmitting mixer TMI. Therefore the mixer and the sending clock are not necessarily in step.
  • the transmitter When one of the idle transmitters, as for example the transmitter Ta, receives a supply of tape, the transmitter is entered on the line by the closing of the auto-control contacts 57 by the accumulation of the tape loop. The closing of contacts 51 completes the circuit of the right hand winding of relay 56, causing a balance to be produced through the windings of said relay and the armatures to be released. This may ooour, of course, with the brush 8'! of the sending clock SC in any of its positions. Eventually, however, the brush 81 is stepped around to the segments 80 and 8
  • the local impulse does find a path, however, through the winding 66 of relay Qa and the winding 65 of relay So to ground at the middle armature of the latter relay, thereby restoring relay Qa to its right hand side and removing battery at contact 6
  • Winding 65 of relay Sa merely holds this relay on its right hand side until relay Qa operates.
  • the transmitter Ta is completely entered on the line and serves to transmit in its turn with the remaining operative transmitters .as described above.
  • transmitter Ta may occur with the mixer TMI in any position, the mixer being held in that position for the entering cycle. As the mixer continues to revolve following the entry of the transmitter Ta, it will eventually reach segment II at which time the first character code combination on the tape in said transmitter will be set up in the relay bank 34 in the ordinary manner.
  • the closing out of the transmitter is always followed by the transmission of a blank or all spacing signal over the line as the concluding signal from that transmitter and the entry of an idle transmitter on the line is preceded by the transmission of a special entry code combination having the fourth impulse marking and occurring whenever the brush of the clock SC reaches the segments corresponding to the transmitter being entered on the line.
  • the means for controlling the disconnection and reconnection of a transmitter to the expanding channel may be varied if desired and may further utilize other special signals or code combinations which are not employed for transmitting character signals.
  • Line relay LR2 Signals transmitted over the line LI are received by the line relay LR2 (Fig. 3), which by way of example is shown as being located in the exchange or ofiice in Albany, whereas the transmitter Ta is arranged to control a printer located in Boston, so that an additional channel from Albany to Boston is involved in the communication circuit.
  • the line relay LR2 impresses the received signals upon the solid ring IIO of the receiving distributor RD2, the signals being transferred through segments I to 5 and II to I5 of the receiving ring III to the relays of a code bank of relays CB and a storage bank of relays SB.
  • the armatures of the storage relays SB are connected through the conductors H2 in multiple to the armatures of multicontact relays I I3, H4 and H5.
  • subchannel A includes, at this oflice, repeating means such as a tape reperforator I20 and tape transmitter I2I arranged to repeat the received signals over another lane of traflic extending to Boston.
  • the tape reperforator I20 may be similar to that disclosed in the patent to Hoover and Haupt, No. 1,851,838, granted March 29, 1932.
  • Other well known storage devices may be employed, if desired, but a device having infinite storage capacity is preferred since provision is thus made for an unlimited accumulation of message signals at this point.
  • the tape transmitter I2I may be similar to the transmitters Ta, Tb and Tc, and the manner in which this transmitter is entered on the associated lane of trafiic whenever tape is fed out of the reperforator I 20 will be clear from the foregoing description of the operation of transmitters Ta, Tb and To.
  • a printer I22 at the remote end of the channel is arranged to respond to the message signals from the transmitter I2I.
  • the transmission rate over the second expanding channel is determined by the capacity of the trafiic lane available and the number of operative transmitters or repeaters utilizing the traffic lane, and may be different from the rate of operation of reperforator I20 over the first traflic lane.
  • the line circuits or lanes I8, I9 may be combined in a duplex circuit, as in the case of the line LI, and one or more transmitters I23 are arranged to control printers or repeaters connected to the conductors I24, in the same manner as the transmitters Ta, Tb and Te, for receiving signals from Boston. For the sake of simplicity, these detailed circuits are not shown.
  • Subchannel B of the lane of traffic from New York to Albany is connected to a printer, for example in a branch office in Albany as disclosed in my prior application to provide communication between New York and Albany; subchannel C is connected to a repeater associated with a lane of traflic to Chicago, arranged similarly to that shown in connection with subchannel A.
  • the channel of the multiplex represented by the segments 6I0 is connected through a control apparatus unit I25 to repeater I26, I21 associated with a lane of traiiic to Chicago which, as
  • the armatures of relays CB are coded so as to supply negative battery to a conductor I30 whenever a blank or all-spacing signal is received and to apply the same battery potential to a conductor-v I3I whenever the entry code combination having the fourth impulse marking is received, thereby operating entry relay I32.
  • a receiving mixer RMI and a receiving clock RC common to all of the receiving printer and repeater units, and polar cut-out relays I33, I34 and I35, each individual to one of the receiving units.
  • the receiving mixer RMI comprises a brush carrier having a brush I rotating in synchronism with the brush 11 of the transmitting mixer TMI and latch mechanism similar to that of the transmitting mixer.
  • the brush I40 is arranged to connect a solid ring I4I with six contact segments I42, I43, I44, I45, I and I41, one after the other.
  • the solid ring I is connected to a release magnet I48.
  • the receiving clock RC comprises a rotating brush carrier provided with a brush I rotating in synchronism with the brush 81 of the sending clock SC and controlled by latch mechanism similar to that of the sending clock.
  • the brush I50 is arranged to connect a solid ring I5I with three contact segments I52, I53 and I54, one after the other, when released by the release magnet I55.
  • the solid 'ring I5I is connected to the make contact of relay I32.
  • the segments I52, I53 and I54 of the receiving clock RC are connected to windings of the polar relays I33, I34 and I35 respectively, the other windings of said relays being connected to the short segments I43, I45 and I41, respectively, of the receiving mixer RMI Assuming that each of the transmitters Ta, Tb and To is transmitting over the lane of trail'ic with the brush I40 of the receiving mixer RMI on segment I42 and the combination from the transmitters Ta.
  • relay II3 connects the selecting magnets of the reperforator I20 to the armatures of the storage relays SB, setting up in the reperforator the combination stored in the storage relays and also through its lower armature and front contact closes the circuit of slow operating relay I10.
  • the relay I10 is arranged to energize the punch magnet of the reperforator and step the tape therethrough as is well known in the art.
  • the character received over the second channel of the multiplex is stored in the tape at the reperforator I26 for subsequent transmission to the channel associated with the tape transmitter I21.
  • the local ring of the distributor may be provided with a segment such as the segment I'll connected through conductor I12 to the control unit I for operating the connecting relay and punch magnet of the reperforator I26 in a manner similar to that described above.
  • transmitter Ta is entered on the circuit again, this operation will be indicated at the receiving station by the reception of the entry code combination having the fourth impulse marking. This will occur only when the brush I50 at the receiving clock RC is at rest on segment I52 since the receiving clock RC and the sending clock SC are both invariably stepped ahead two positions upon each revolution of the multiplex distributors and are therefore maintained in synchronism.
  • the entry code combination applies negative battery to the winding of relay I 32 whereupon said relay becomes energized and disconnects the local segmentsIGl and I62 from the windings of relays H3, H4 and H5, and the receiving mixer RMI is thus held in its last position in the same manner that the'transmitting mixer ml was held at rest during the transmission of this entry code combination.
  • relay I32 also closes a circuit from the segment I6I or I62 to the solid ring I5I of the receiving clock RC and thence by brush I50 and segment I52 to the lower winding of relay I33 in a direction to restore the armature thereoi to its left hand contact, thus removing positive battery from the segment I42 of the receiving mixer RMI Consequently the repeater associated with subchannel A .is re-entered on the lane 01' traflic so that it will respond to subsequent signals transmitted from the transmitter Ta.
  • the described circuit of relay I32 is interrupted and the receiving apparatus of the lane of traflic is restored to normal with the repeater I20, I2I entered upon the lane.
  • the receiving apparatus associated with subchannels B andC are automatically disconnected from the lane of traflic and reconnected thereto at the same time that the corresponding transmitters Tb and To are disconnected and reconnected to the transmitting end of the lane.
  • tape transmitter I2I or an equivalent automatic transmitter may be arranged to transmit 'over other types of circuits than a subchannel of the lane of traflic to Boston as indicated.
  • various .types of repeating apparatus including mechanical storage transmitters known in the art may be employed in lieu of the tape reperforator and tape transmitter described in detail.
  • two channels of a synchronous multiplex system as the lane of traflic for the various subchannels, as illustrated in the drawings, it will be obvious that one channel or three or more channels might be used 'or one or more circuits or channels of a diflerent character.
  • the lane of traflic may also consist of combinations of different types of channels, such as a synchronous multiplex channel and a carrier channel, or other arrangements of circuits or channels of any desired character.
  • a synchronous multiplex channel and a carrier channel or other arrangements of circuits or channels of any desired character.
  • a first lane of traflic means for transmitting signals, means for varying the'number of channels operating over said lane of traflic and causing the operating channels to occupy invariably substantially the full lane time, a second lane of trail-1c and means for repeating certain of the message signals transmitted over said first lane of trafllce into said a second lane of ,trafiicr 2.
  • a first lane of traffic means for varying the number.
  • a first lane of tramc means for transmitting signals over said lane, means for varying the number of channels operating over said lane of traflic and causing the operating channels to occupy invariably a predetermined part of the capacity of the lane, a second lane of traflic and means for transmitting signals over said second lane and causing a variable number of channels to occupy invariably a predetermined part of the capacity of the second lane, said last-mentioned means including means for repeating signals transmitted over the first lane of trafiic.
  • An expanding channel system comprising a plurality of lanes of trafiic in series relation, code telegraph transmitters associated with each lane, means for controlling certain of said transmitters to repeat signals received from another transmitter and means to divide a predetermined part of the lane time of each of said lanes of traffic between the operative associated transmitters irrespective of the number which are operative.
  • An expanding channel system comprising two lanes of traffic in series relation, a plurality of signal transmitters associated with each lane, means for controlling a transmitter on the second lane in accordance with the operation of a transmitter on the first or preceding lane and means to divide a predetermined part of the lane time of each of said lanes of traflic between the operative associated transmitters irrespective of the number which are operative.
  • a lane of trailic a plurality of code telegraph transmitters, means for rendering any one or more of said transmitters operative to transmit over said lane and for dividing a predetermined part of the entire lane for rendering any one or more of said transmitters operative to transmit over said lane and for dividing a predetermined part of the entire lane time between operative transmitters, and means for operating one of said transmitters at a rate different from that at which the signals therefrom are transmitted over said lane of trafiic.
  • a lane of traffic a plurality of code telegraph transmitters, means for rendering any one or more of said transmitters operative to transmit over said lane and for dividing a predetermined part of the entire lane time between operative transmitters, and multiple-character signal storage means between one of said transmitters and said lane of trafiic.
  • a lane of traffic a plurality of printers, means for operatively associating a variable number of said printers with said lane and for dividing the entire lane time between operative printers, and multiple-character signal storage means between said lane and one of said printers.
  • a lane of trailie a plurality of printers, means for operatively associating a variable number of said printers with said lane and for dividing an invariable portion of the lane time between operative printers irrespective of number, and code signal storage means between said lane and one of said printers.
  • a signalling system comprising two lanes of traffic, a plurality of signalling sub-channels including receiving devices, means for operatively associating a variable number of said receiving devices with one of said lanes and Tor dividing an invariable portion of the lane time between operative receiving devices irrespective of number, and signal storage means between said lanes of trafiic in the subchannel to which one of said receiving devices is connected.
  • a telegraph system comprising a lane of traflic, a plurality of signal storage devices of the infinite storage type associated therewith, means for operating any one or more of said devices over said lane, means for entering any of said devices thereon, means whereby said last mentioned means is operable over said lane and means whereby the operative storage devices divide a predetermined part of the entire lane time at all times.
  • a telegraph system comprising a lane of traflic, a. plurality of signal storage devices associated therewith, a transmitter individual to each of said storage devices and arranged to repeat the signals stored therein, means for operating any one or more of said storage devices over said lane,-a sequencing device and means for operating said sequencing device through successive positions individual to each of said storage devices for determining the order of operation of said storage devices when more than one is operative at the same time.
  • a telegraph system comprising a lane of trafiic, a plurality of signal storage devices of the infinite storage type associated therewith, a transmitter individual to each of said storage devices and arranged to repeat the signals stored therein,. means for operating any one or more of said storage devices over said lane, a sequencing device, means for operating said sequencing device through successive positions individual to each of said storage devices for determining the order of operation of said storage devices when more than one is operative at the same time and means for automatically connecting a storage device to and disconnecting the same from said lane of traffic.
  • a telegraph system comprising a lane of trafiic, a plurality of tape reperforators associated therewith, a tape transmitter individual to each of said reperforators, means for operating any one or more of said tape reperforators over said lane for periods depending upon the number of channels operating and” means including said reperforators for controlling said transmitters.
  • a signalling system comprising two lanes of traffic, a plurality of signalling sub-channels including receiving devices,means for operatively associating the variable number of said receiving devices with one of said lanes and for dividing a predetermined portion of the lane time between operative receiving devices irrespective of number and a signal repeater between said lanes of trafi'ic in the sub-channel to which one of said receiving devices is connected.
  • a telegraph system comprising three offices, an expanding channel system connecting the first and second oflices, said system embodying means including code transmitters at the first oflice arranged to send a varying number of code character signals from each transmitter in a given time, receiving devices at the second ofilce arranged to receive said signals and means at the second oflice for repeating said variable rate signals to the third ofiice.
  • a telegraph system comprising a character storage device, a signalling circuit terminating in said device, and an expanding channel system including transmitting subchannels of which the transmitting capacity varies, means for varying the number of said subchannels in operation and means for causing the transmitting capacity of said operating subchannels to vary depending upon the number of operating subchannels, said expanding channel system further including a code transmitter and means for operating said transmitter under the control of said character storage device.
  • a telegraph system comprising a signal ing channel system further including transmitting means operatively associated with said signal storage device.
  • a telegraph system comprising a' signal storage device of the infinite storage type, a signalling circuit terminating in said device and an expanding channel system including transmission 'subchannels of which the transmitting capacity varies, means for varying the number "ing channel system further including transmitting means arranged to repeat the signals stored in said signal storage device.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Communication Control (AREA)
  • Mobile Radio Communication Systems (AREA)
US106904A 1936-10-21 1936-10-21 Telegraph system Expired - Lifetime US2233346A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US106904A US2233346A (en) 1936-10-21 1936-10-21 Telegraph system
GB27698/37A GB499905A (en) 1936-10-21 1937-10-12 Improvements in or relating to telegraph systems
FR828081D FR828081A (fr) 1936-10-21 1937-10-20 Perfectionnements aux systèmes télégraphiques

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US106904A US2233346A (en) 1936-10-21 1936-10-21 Telegraph system

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US2233346A true US2233346A (en) 1941-02-25

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GB499905A (en) 1939-01-31
FR828081A (fr) 1938-05-10

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