US2277192A - Multiplex signal-translating system - Google Patents

Multiplex signal-translating system Download PDF

Info

Publication number
US2277192A
US2277192A US337569A US33756940A US2277192A US 2277192 A US2277192 A US 2277192A US 337569 A US337569 A US 337569A US 33756940 A US33756940 A US 33756940A US 2277192 A US2277192 A US 2277192A
Authority
US
United States
Prior art keywords
signal
channels
input
channel
tube
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
US337569A
Other languages
English (en)
Inventor
John C Wilson
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.)
BAE Systems Aerospace Inc
Original Assignee
Hazeltine 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
Priority to NL62795D priority Critical patent/NL62795C/xx
Application filed by Hazeltine Corp filed Critical Hazeltine Corp
Priority to US337569A priority patent/US2277192A/en
Priority to GB11060/41A priority patent/GB550814A/en
Application granted granted Critical
Publication of US2277192A publication Critical patent/US2277192A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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 a multiplex signal'- translating system in which a plurality of signalinput channels are successively operatively coupled through a signal-transmission channel to a plurality of signal-output channels in such a way that the signal-transmission Vchannel is used at any given instant only for connecting one of the signal-input channels to its corresponding signal-output channel.
  • Such a multiplex signal-translating system is V commonly referred to as a shared-time multiplex system, to distinguish it from the more widely-used shared-frequency system in which the frequency range of the signal-transmission vchannel is divided into sub-ranges by lters, each sub-range being continuously available for con-l nection between a pair of signal-input and signaloutput channels.
  • the transmission channel has comprised a channel having a wide transmission pass band-and the system has beenused to couple several corresponding input and output channels which translate signals of a frequency range which is narrow with respect to the pass band of the transmission channel.
  • Such an arrangement has been used in telephone and -telegraph systems so that a single transmission line or channel can be utilized to transmit a plurality of different telephonic or telcgraphic signals.
  • the system includes means for cyclically simultaneously connecting and simultaneously disconnecting the signal-input channels and corresponding signal-output channels to the signal-transmission channel in a predetermined sequence and at a frequency which is I higher: than that of the highest-frequency signal component to be transmitted from any of the signal-input channels over the Signal-transmission channel.
  • Means are further provided for controlling the fraction of an operating cycle of the rst-named means that any particular signal-input channel which is in use and its corresponding signal-output channel are connected together through the signal-transmission channel inversely in accordance with the number of signal-input channels which are in use during the operating cycle.
  • the term frequency which is higher than that of the highest-frequency signal component to be transmitted has reference to the frequency of the highest modulation frequency in case a modulated-carrier signal' transmitted and in any case has reference to the highest-frequency signal which is transmitted and reproduced.
  • Means are provided for successively and cyclically simultaneously connecting and simultaneously disconnecting the signal-input channels II-I8, inclusive, and corresponding signal-output channels Il-2i, inclusive, to the signal-transmission channel Il, I8 at a predetermined frequency which is higher than that of the highest-frequency signal component to be transmitted from any of the signal-input channels II-I8, inclusive, over the signal-transmission channel III, I0 to corresponding signal-output channels I9-28, inclusive.
  • Each of the cathode-ray tubes 21 and 28 comprises, in the order named, a conventional electron gun which may consist of a cathode and an accelerating anode 3 I ,vertical deecting plates 32, 33, horizontal deflecting plates 34, 85, a collector electrode 36, and a plurality of rectangular target electrodes, of which two are identifled as 31, 38, the letters a and b being associated with the reference numerals identifying elements of tubes 21 and 28, respectively.
  • a conventional electron gun which may consist of a cathode and an accelerating anode 3 I ,vertical deecting plates 32, 33, horizontal deflecting plates 34, 85, a collector electrode 36, and a plurality of rectangular target electrodes, of which two are identifled as 31, 38, the letters a and b being associated with the reference numerals identifying elements of tubes 21 and 28, respectively.
  • Fig. 1 of .the drawings is a circuit diagram, partly schematic, of a complete multiplex signaltranslating system embodying the invention, while Figs. 2li-5, inclusive, comprise graphs used to explain certain of the operating conditions of the system of Fig. l.
  • a multiplex signal-translating system comprising a signal-transmission channel which may be either a radio or wire channel and is represented by lines I3, I0; a plurality of signal-input channels, represented,
  • target electrodes including electrodes 31 and 38, synchronously in the two cathode-ray tubes at a frequency which is higher than that of the highest-frequency signal component to be transmitted from any of the signal-input channels over the signal-transmission channel.
  • Input channels I4 and I1 only are illustrated as being connected, respectively, to target electrodesv 31s and 38; of cathode-ray tube 21, although it will be understood that any practicable number of target electrodes can be utilized in cathode-ray tube 21, each of which is operatively connected to an input channel of the type represented by conductors II-I8, inclusive, only the two target electrodes being shown operatively connected for the purposes of illustration herein.
  • the signal-input channel I4 is connected to target electrode 31s through an amplifier 40 while signal-input channel I1 is similarly coupled to target electrode A38 through an amplifier 4I,'this latter channel being shown in dotted lines for the sake of clarity.
  • the cathode-ray tube switching device 28 comprises also a control grid 42s and output signals, derived from collectorelectrode 36a of cathoderay tube 21, are translated through an amplifier 44, the signal-transmission channel III, III, and an amplier 45 to the control grid of cathoderay tube 28.
  • a signal-translating device 46 corresponding to signal-input channel I4, is coupled to target electrode 31h of cathode-ray tube 28, while a signal-translating device 41, corresponding to signal-input channel I1, is correspondingly coupled'to target electrode 38s of cathode-ray tube 28.
  • Switches S, 1, 8, and 9 are provided vso that any signal-input channel and its correaa'zrgica therein.
  • Each portion of a signal which is translated by the transmission channelpl, i0 is effective to vary theelectron stream oi tube 28 in accordance with the translated signals and, therefore. tovary the output derived from the target electrodes ot the tube in accordance with the translated signals. It the frequency of the operating cycle of the synchronous connecting and disconnecting means is very high and the pass band of the channel I0, I0 is adequate, the ildelityoi transmission oi' any given signal is-not unduly materially impaired.
  • a ratchet" scanning-potential generator comprising a con denser 66 and a resistor 61 to form a differentiating circuit such that the high rate of change of voltage, corresponding vto the rapid discharge o( condenser 66 through tube 64 causes a pulse voltage to appear across the resistor 61.
  • This pulse voltage across resistor 61 is applied to the input circuit of a vacuum tube 66 which has its anode-cathode circuit4 included in the charging circuit o! a condenser 58.
  • a suitable bias is provided for tube 69 by means of source 68 which, in the absence of such a voltage pulse.
  • the discharge circuit'of condenser 68 includes a gas-filled tube 1B having its anode-cathode electrodes coupled across con- -denser 58 and having a control electrode 'so means that any particular sgnal-input channel which is'in use and its corresponding signal-output channel are connected together through the signal-transmission channel I0, I0 inversely in accordance with the number of signal-input channels which are in use at the time. That is, an arrangement is provided whereby only those signal-input channels and their corresponding signal-output channels which are being utilized to translate a conversation or other'signal are caused to share the effective portion of theoperating cycle.
  • the system comprises means for scanning the target electrodes of each of cathode-ray tubes 21 and 28 at avery high frequency in the absence of any signal input to the transmission line I0, I0 and for causing the scanning of such target electrodes to which signals are applied to be very materially retarded in order that substantially the total time of a scanning cycle of the synchronous switching means he devoted only to those target electrodes which are connected to signal-input channels in use.
  • a saw-tooth scanning oscillator including con-,-
  • denser 56 adapted to be charged and discharged. to provide scanning potentials in the horizontal y direction.
  • a vacuum tube 62 through the anode-cathode circuit of which condenser 56 is coupled to the high-voltage source 60.
  • a suitable screen-voltage operating potential ior Vacuum tube 62 is provided by moans of voltage-dividing resistor 63 coupled across the high-voltage source 63.
  • a tube 64 In order to discharge condenser 58 after the voltage thereof has risen to a predetermined value, there is provided a tube 64.
  • the condenser 56 is relatively slowly charged to a predetermined voltage, as represented bydotted line 14 of Fig. 2d, through vacuum tube 62, as indicated by charging line 13 of Fig. 2a, and is rapidly discharged through tube 66. as indicated by line 15 of Fig.
  • cathode-ray tube 28 at the receiving station is similarly scanned and, for this purpose,v the scanning potential applied to scanning plates 36a', 35a of tube 21 is transmitted over a channel or line 34 and applied to the input circuit of a controlled scanner 1 I.
  • suitable initial biasing potentials are provided for the scanning plates 32e and 35e of cathode-ray tube 28 in a manner similar to'that described for cathoderay tube 21.
  • the portion oi the system of Fig. 1 included within the dotted line 12 is duplicated in the lcontrolled scanner 1l in order to provide suit- It will also be understood that] able scanning potentials for application to plates 32s, 33s of cathode-ray tube 28.
  • a pulse voltage is applied to the input circuit of tube 69 through the differentiating circuit 66, 61, thereby to cause tube 69 to become conductive and partially to charge condenser 58 as represented by the voltage step 16 of Fig. 2b.
  • These steps are repeated during each discharge period of condenser 56 until the discharge potential of condenser 58, represented by the dotted line 11, is reached after which condenser 58 is discharged through tube 10, which is so'biased' that it becomes conductive when its anode-cathode potential reaches that represented by dotted line 11.
  • the circuit is sc proportioned that the discharge potential, represented by dotted line 11, is obtained during the discharge period of condenser 56 following the scanning of the last line of the target electrodes of cathode-ray tube 21.
  • cathode-ray tube 50 for the purpose of providing a control-signal output which varies in accordance with the pattern represented by the particular target electrodes of the cathoderay tube 21 which are being energized through one of signal-input channels lI-I, inclusive.
  • the cathode-ray tube 50 is generally similar to cathode-ray tube 21 and similar circuit elements have identical reference numerals with the added letter c.
  • the scanning plates of cathode-ray tube 50 are connected in parallel with those of tube 21.
  • coupled to the output circuit of amplifier 48 and, in turn, having its output circuit coupled through a limiter 52 to target electrode 31e of cathode-ray tube 50.
  • a rectifier 54 having an input circuit coupled to the output circuit of amplifier 4I andhaving its output circuit coupled through a limiter 55 to target electrode 38e of cathode-ray tube 50.
  • an amplifier 18 which is designed to be quickly responsive and having its inputcircuit coupled to a load resistor 86 in the circuit of the collector electrode 36e of tube 50 and having its output circuit coupled to a. control electrode of vacuum tube 62.
  • Tube 58 is.
  • a negative potential pulse is, therefore, developed across the load resistor 36' of collector electrode 36er of tube 50 and applied to amplifier 18 and the amplier is so proportioned that there is also derived therefrom a negative potential pulse effective to reduce the conductance of vacuum tube 62 for the duration of the pulse, thereby to retard the charging of condenser 56.
  • Figs. 3a and 3b In order to explain the effect of control tube 50 and its associated apparatus on the circuit of Fig. 1, reference is made to Figs. 3a and 3b. It 1s here assumed that only target electrode 31 or the second target electrode of the first row of targets of each of cathode-ray tubes 21, 28, and 50 is energized, which means that only the signal-input and output channels which are connected through transmission line I0, I8 and through these targets are energized by an input signal for translation. Under these conditions, the scanning potentials derived from the horizontal scanning oscillator including condenser 56 and from the vertical scanning oscillator including condenser 58 are represented by the curves of Figs. 3a and 3b, respectively.
  • the second target of the rst row, or target 31e which is the one assumedto be in use, is scanned and, during this interval, a signal output is derived from collector electrode 36e of tube 50 which is applied to tube 62 through amplifier 18 materially to lowei ⁇ its conductance, thereby to reduce the charging rate of condenser 56, as illustrated by the charging line 86.
  • This condition obtains until the voltage across condenser 56 has reached approximately two-thirds the maximum scanning voltage represented by line 14; when the scanning of the target connected to the input channel in use is completed, the control bias derived from the collector electrode of tube 50'falls and the charging'rate is again increased to its maximum value as represented by the charging line 8l.
  • Figs. 4a andfib there are shown, respectively, curves which correspond to those of Figs. 3a and 3b under the conditions that the signalinput channels are in use which Aare connected to the second target of the rst row, the i-lrst target of the third row, and the last target of the fourth row.
  • the charging line 82 represents the'charging of con-V denser 56 during the time that the flrst target of the first row is rapidly scanned
  • the charging line' 83 corresponds to the relatively slow scanning of the second target of the rst row
  • the line 84 corresponds to the rapid scanning of the third target of the first row.
  • applicants system comprises means for controlling the fraction of an operating cycle that any particular signal-input channel which is in use and its corresponding signal-output channel are connected together through the transmission channel inversely in accordance' with the number of signal-input channels which are in use and that means are provided to cause only the particular signal-input channels and their corresponding signal-output channels which are in use during an operating cycle to share the eiective portion of the operating cycle.
  • this is accomplished by extending the time of each operating cycle in accordance with the number of signalinput channels which are in use.
  • the sum of all the operating-cycle fractions corresponding to input circuits which are in use is a substantial part of the operating cycle and preferably the arrangement-is so designed that the sum of all said fractions is substantially the whole of the operating cycle.
  • ay be provided in addition an arrangement for controlling the gain of ampliiier 18 inversely in accordance with the number of signal-input channels which are in use.
  • a gain-control means 93 having an input circuit coupled to collector electrode 36 ofcathode-ray tube 50 and having an output circuit from which is derived a'potential utilized to control the gain of amplifier 18.
  • the gainccntrolmeans 93 comprises a vacuum-tube amplii'ler 94 having an input circuit coupled to co1- lector electrode 36C of tube 50 and an output circuit coupled to the input electrodes of a vacuum tube 95 included in a counter circuit.
  • the output circuit of tube 95 comprises a load resistor 96 and a source 91 of unidirectional operating voltage coupled in series. -There is also coupled across the series combination a series-connected diode 98 and condenser
  • a resistor 99 is connected between a terminal common to diode 98 and condenser
  • vacuum tube 95 is so biased as to become conductive only when a target electrode of cathoderay tube is being scanned which has a signal applied thereto. It will thus be seen that condenser
  • 00 varies in accordance with the number of target electrodes of cathode-ray tube 50 which are connected to This potential is applied to one or more of thecontrol grids -of vacuum tubes in amplier T8 to decrease their amplification in accordance with the magnitude of the control voltage in a manner Well under-- stood in the art.
  • the effect of the gain-control arrangement is to cause the period of an operating cycle, when the signalinput -channels connected to a plurality of control electrodes are in use, to approach, or to become substantially equal to,the period of a scanning cycle when only one ⁇ signal-input channel is in use.
  • the scahning beams of tubes 21, 28, and 50 are caused to scan more slowly the target electrodes corresponding to signal-input and signal-output channels actually in use, that is, which are energized, by means of potentials derived from the channels in use, it will be understood that the in vention is not limited to such an arrangement but that the speed of scanning of the several target electrodes can be controlled in response to any suitable operating condition of the system.
  • a signal-transmission channel a plurality of signal-input channels, a. plurality of corresponding signal-output channels, means for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signal-output channels to said signal-transmission channel ina predetermined sequence and at a frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means for controlling the fraction of an operating cycle of said rst-named means that any-particular signal-input channel which is in use and its corresponding signal-output channel are connected together through said signal-transmission channel inversely in accordance with the number of signal-input channels which are in use during said operating cycle.
  • a modulated-carrier signal-translating system comprising, a modulated-carrier signaltransmission channel, a plurality of modulatedcarrier signal-input channels, a plurality of corresponding modulated-carrier signal-output channels, means for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signaloutput channels to said signal-transmission channel in a predetermined sequence and at a frequency which is higher than that of the highest modulation-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means for controlling the fraction of an operating cycle of said rst-named means that any particular signal-input channel which is in use and its corresponding signal-output channel are connected together through said signaltransmission.
  • channel inversely in accordance with the number of signal-input channels which are in use during said operating cycle.
  • a multiplex signal-translating system comprising, a signal-transmission channel, a plurality of signal-input channels, a plurality of corresponding signal-output channels, means for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signal-output channels to said signal-transmission channel in a predetermined sequence and at a frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission-channel, and means for controlling the fraction of an operating cycle of said first-named means that any particular signal-input channel which is in use and its corresponding signaloutput channel are connected together through said signal-transmission channel inversely in accordance' with the number of signal-input channels4 which are ⁇ energized during said operating cycle and for maintaining the sum of all said fractions corresponding to signal-input circuits which are in use during said operating cycle a substantial part of the operating cycle.
  • a signal-translating system comprising, a signal-transmission channel, a plurality of signalinput channels, a plurality of corresponding signal-output channels, means for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signal-output ,channels to said signal-transmission channel in a predetermined sequence and at a frequency which is higher than that of the'highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means for controlling the fraction of an operating cycle of said first-named means that any particular signal-input channel which is in use and its corresponding signal-output channel are connected together through said signal-transmission channel inversely in accordance with the number of signal-input channels which are energized during said operating cycle and for maintaining thev sum of all said fractions corresponding to signal-input circuits which are in use during said operating cycle a major portion of the operating cycle.
  • a multiplex signal-translating system comprising, a signal-transmission channel, ⁇ a plurality of signal-input channels, a plurality of corresponding signal-output channels, means including Vsynchronously-scanned cathode-ray tubes for cyclically simultaneously connecting and simultaneously disconnecting said signalinput channels and corresponding signal-output channels to said signal-transmission channel in a predetermined sequence and at a frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means ⁇ for controlling the fraction of an operating cycle of said first-named means that any particular signalinput channel which is in use and its corresponding signal-output channel are connected together through said signal-transmission channel inversely in accordance with the number of signal-input channels which are in use during said operating cycle.
  • a multiplex signal-translating system comprising, a signal-transmission channel, a plurality of signal-input channels, a plurality.of corresponding signal-output channels, a cathoderay tube adapted to be connected with said signal-input channels, a cathode-ray tube adapted to be connected with said signal-output channels, means including said cathode-ray tubes and means for synchronously scanning said tubes for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signal-output channels to said signal-transmission channel in a predetermined sequence and at a frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-'transmission channel, ⁇ and means for controlling said scanning means to control the fraction of an operating cycle of said first-named means that any particular signal-input channel which is in use and its corresponding signal-output channel are connected together through said signal-transmission channel inversely in accordance with the number of signal-input channels which are
  • a multiplex signal-translating system comprising, a signal-transmission channel, a plurality of signal-input channels, a plurality of corresponding signal-output channels, a cathoderay tube adapted to be connected with said input channels, a cathode-ray tube adapted to be connected with said output channels, means including said cathode-ray tubes and means for synclironously scanning said tubes for cyclically simultaneously connecting and simultaneously disconnecting said input channels and corresponding signal-output channels to said signal-transmission channel in a predetermined sequence and at a frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means for instantaneously retarding the rate of scanning, only during the period said tubes are operative to connect a signal-input channel which is in use with said signal-transmission channel, whereby the fraction of an operating cycle of said rst-named means that any particular signal-input channel which is in use and its corresponding signal-out
  • a multiplex signal-translating system comprising, a signal-transmission channel, a plurality of signal-input channels, a plurality of corresponding signal-output channels, means comprising a condenser and means for charging and discharging said condenser for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signal-output channels to said signaltransmission channel in a predetermined sequence and at a frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means for controlling the rate of change of charge of said condenser to decrease the rate of scanning only during the period a signalinput channel which is in use is connected to said signal-transmission channeL'whereby the fraction of an operating cycle of said firstnamed means that any particular signal-input channel which is in use and its corresponding signal-output channel are connected together through said signal-transmission channel is controlled inversely in accordance with the number of signal-input channels which are in use
  • a multiplex signal-translating system comprising, a signal-transmission channel, a plurality of signal-input channels, a plurality of corresponding signal-output channels, a cathoderaytube adapted to be connected with said signal-input channels, a cathode-ray tube adapted to be connected with said signal-output vchannels, means including said cathode-ray tubes land means for synchronously scanning said tubes, comp-rising a condenser and means for charging and discharging said condenser, for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signal-output channels to said signal-transmission channel in a predetermined sequence and at a frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means for controlling the rate of change of charge of said condenser to decrease the rate of scanning only during the period a signal-input channel which is in use is connected to said signal-transmission channel
  • a multiplex signal-translating system comprising, a signal-transmission channel, a -plurality of signal-input channels, a plurality of corresponding signal-output channels, means for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signal-output channels to said signal-transmission channel in a predetermined sequence and at a, frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means responsive to a control derived from channels in use for maintaining the time of each operating cycle of said first-named means substantially constant during periods when any of said channels are in use and for controlling the fraction of an operating cycle of said rstnamed means that anyparticular signal-input channel which is in use and its corresponding signal-output channel are connected together through said signal-transmission ychannel inversely in accordance with the number of signalinput channels which are in use during said operating cycle.
  • a multiplex signal-translating system comprising, a signal-transmission channel, a plurality of signal-input channels, a plurality of corresponding signal-output channels, a cathoderay tube adapted to be connected with said sig- 'nal-input channels, a cathode-ray tube adapted means for synchronously scanning said tubes,l
  • a multiplex signal-translating system comprising, a signal-transmission channel, a. plurality of signal-input channels, a plurality of corresponding signal-output channels, a cathoderay tube adapted to be connected with said signal-input channels, a cathode-ray tube adapted' to be connected with said signal-output channels, means, including said cathode-ray tubes and means for synchronously scanning said tubes, for cyclically simultaneously connecting and simultaneously disconnecting said signalinput channels and corresponding signal-output channels to said signal-transmission channel in a predetermined sequence and at a frequency which is higher than that of the highest-irequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means for extending the time of each operating cycle of said rstnamed means in accordance with the number of signal-input channels which arein use and for controlling the fraction of an operating cycle that any particular signal-input channel which is in use and its corresponding signal-output channel are connected together
  • a multiplex signal-translating system comprising, a signal-transmission channel, a plurality of signal-input channels, a plurality of corresponding ⁇ signal-output channels, means for cyclically simultaneously connecting and simultaneously disconnecting said signal-input channels and corresponding signal-output channels -to said signal-transmission channel in a pre-1 determined sequence and at a, frequency which is higher than that of the highest-frequency signal component to be transmitted from any of said signal-input channels over said signal-transmission channel, and means for controlling said rst-naied means to cause only the particular signal-input channels and their corresponding signal-output channels which are in use during an operating cycle-of said rst-named means to be connected together simultaneously and to share the effective portionV of said operating cycle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Television Systems (AREA)
US337569A 1940-05-28 1940-05-28 Multiplex signal-translating system Expired - Lifetime US2277192A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL62795D NL62795C (en(2012)) 1940-05-28
US337569A US2277192A (en) 1940-05-28 1940-05-28 Multiplex signal-translating system
GB11060/41A GB550814A (en) 1940-05-28 1941-08-29 Multiplex signal-translating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US337569A US2277192A (en) 1940-05-28 1940-05-28 Multiplex signal-translating system

Publications (1)

Publication Number Publication Date
US2277192A true US2277192A (en) 1942-03-24

Family

ID=23321062

Family Applications (1)

Application Number Title Priority Date Filing Date
US337569A Expired - Lifetime US2277192A (en) 1940-05-28 1940-05-28 Multiplex signal-translating system

Country Status (3)

Country Link
US (1) US2277192A (en(2012))
GB (1) GB550814A (en(2012))
NL (1) NL62795C (en(2012))

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437027A (en) * 1943-01-12 1948-03-02 John H Homrighous Time division multiplex communication system
US2447233A (en) * 1943-04-07 1948-08-17 Standard Telephones Cables Ltd Pulse time modulation multiplex receiver
US2472774A (en) * 1945-10-17 1949-06-07 Farnsworth Res Corp Irregular interlace scanning system
US2506612A (en) * 1946-01-25 1950-05-09 Fed Telecomm Lab Inc Electronic communication system
US2517365A (en) * 1946-04-10 1950-08-01 Patelhold Patentverwertung Multiplex communication system with channels of different band widths
US2524708A (en) * 1947-02-06 1950-10-03 Gen Electric Co Ltd Pulse multiplex receiving system
US2541932A (en) * 1948-05-19 1951-02-13 Bell Telephone Labor Inc Multiplex speech interpolation system
US2546935A (en) * 1945-09-28 1951-03-27 Rca Corp High fidelity pulse multiplex system
US2548661A (en) * 1949-02-10 1951-04-10 Bell Telephone Labor Inc Elastic time division multiplex system
US2559603A (en) * 1946-10-05 1951-07-10 Int Standard Electric Corp Electrical pulse train selecting system
US2564419A (en) * 1947-04-14 1951-08-14 Bell Telephone Labor Inc Time division multiplex system for signals of different band width
US2565102A (en) * 1941-03-15 1951-08-21 Products & Licensing Corp System for connecting a single channel with a plurality of channels in periodical succession
US2589460A (en) * 1948-06-18 1952-03-18 Melpar Inc Electronic commutator
US2605360A (en) * 1947-03-10 1952-07-29 Rca Corp Time division multiplex system utilizing a step-wave generator in the distributor circuit
US2638505A (en) * 1947-03-26 1953-05-12 Int Standard Electric Corp Pulse electronic switching system
US2649505A (en) * 1946-10-04 1953-08-18 Int Standard Electric Corp Pulse time position switching system
US2695974A (en) * 1950-02-24 1954-11-30 Nat Union Radio Corp Two-dimensional pulse counting or registering tube
US2700700A (en) * 1948-09-14 1955-01-25 France Henri Georges De Television system
US2784251A (en) * 1950-08-24 1957-03-05 Eastman Kodak Co Apparatus for translating into legible form characters represented by signals
US2798114A (en) * 1950-10-12 1957-07-02 Motorola Inc Dot-arresting, television scanning system
US2881251A (en) * 1953-12-31 1959-04-07 Strip Joseph Apparatus for time multiplexing speech and short bursts of information
US2892186A (en) * 1953-03-05 1959-06-23 Gen Dynamics Corp Analogue data converter
US3124652A (en) * 1960-12-02 1964-03-10 Multiplex signal demodulator
US3459984A (en) * 1966-12-07 1969-08-05 Dale R Koehler Multiplier logic tube

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565102A (en) * 1941-03-15 1951-08-21 Products & Licensing Corp System for connecting a single channel with a plurality of channels in periodical succession
US2437027A (en) * 1943-01-12 1948-03-02 John H Homrighous Time division multiplex communication system
US2447233A (en) * 1943-04-07 1948-08-17 Standard Telephones Cables Ltd Pulse time modulation multiplex receiver
US2546935A (en) * 1945-09-28 1951-03-27 Rca Corp High fidelity pulse multiplex system
US2472774A (en) * 1945-10-17 1949-06-07 Farnsworth Res Corp Irregular interlace scanning system
US2506612A (en) * 1946-01-25 1950-05-09 Fed Telecomm Lab Inc Electronic communication system
US2517365A (en) * 1946-04-10 1950-08-01 Patelhold Patentverwertung Multiplex communication system with channels of different band widths
US2649505A (en) * 1946-10-04 1953-08-18 Int Standard Electric Corp Pulse time position switching system
US2559603A (en) * 1946-10-05 1951-07-10 Int Standard Electric Corp Electrical pulse train selecting system
US2524708A (en) * 1947-02-06 1950-10-03 Gen Electric Co Ltd Pulse multiplex receiving system
US2605360A (en) * 1947-03-10 1952-07-29 Rca Corp Time division multiplex system utilizing a step-wave generator in the distributor circuit
US2638505A (en) * 1947-03-26 1953-05-12 Int Standard Electric Corp Pulse electronic switching system
US2564419A (en) * 1947-04-14 1951-08-14 Bell Telephone Labor Inc Time division multiplex system for signals of different band width
US2541932A (en) * 1948-05-19 1951-02-13 Bell Telephone Labor Inc Multiplex speech interpolation system
US2589460A (en) * 1948-06-18 1952-03-18 Melpar Inc Electronic commutator
US2700700A (en) * 1948-09-14 1955-01-25 France Henri Georges De Television system
US2548661A (en) * 1949-02-10 1951-04-10 Bell Telephone Labor Inc Elastic time division multiplex system
US2695974A (en) * 1950-02-24 1954-11-30 Nat Union Radio Corp Two-dimensional pulse counting or registering tube
US2784251A (en) * 1950-08-24 1957-03-05 Eastman Kodak Co Apparatus for translating into legible form characters represented by signals
US2798114A (en) * 1950-10-12 1957-07-02 Motorola Inc Dot-arresting, television scanning system
US2892186A (en) * 1953-03-05 1959-06-23 Gen Dynamics Corp Analogue data converter
US2881251A (en) * 1953-12-31 1959-04-07 Strip Joseph Apparatus for time multiplexing speech and short bursts of information
US3124652A (en) * 1960-12-02 1964-03-10 Multiplex signal demodulator
US3459984A (en) * 1966-12-07 1969-08-05 Dale R Koehler Multiplier logic tube

Also Published As

Publication number Publication date
GB550814A (en) 1943-01-26
NL62795C (en(2012))

Similar Documents

Publication Publication Date Title
US2277192A (en) Multiplex signal-translating system
US2172354A (en) Multiplex signaling system
US2211942A (en) Circuit arrangement for separating electrical signal pulses
US2255484A (en) Automatic background control for television systems
US2256336A (en) Pulse modulation system
US2165028A (en) Television and the like system employing cathode ray tubes
US2498081A (en) Electronic counting
US2472779A (en) Cathode-ray tube amplifier
US2311021A (en) Multiplex receiving system
US2175573A (en) Electron beam converter
US2532747A (en) Circuit arrangement comprising a cathode-ray tube
US2465364A (en) Oscillograph system
US2436393A (en) Cathode-ray tube with discharge to deflecting plates
US2587006A (en) Signal conversion system
US2670408A (en) Coupling stage for distributed amplifier stages
US2302311A (en) Electronic system
US2219188A (en) Cathode ray oscillograph control circuits
US2284085A (en) Electric signal transmission system
US2941074A (en) Time division multiplex communication systems
US2608617A (en) Television converter system
US2735988A (en) fyler
US2309744A (en) Television system
US2280695A (en) Television circuits
US2431488A (en) Electron beam deflection system
US2077126A (en) Volume control arrangement