US3218634A - Magnetic core matrix arrangement employing readout from selected nonmagnetized cores - Google Patents

Magnetic core matrix arrangement employing readout from selected nonmagnetized cores Download PDF

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Publication number
US3218634A
US3218634A US38914A US3891460A US3218634A US 3218634 A US3218634 A US 3218634A US 38914 A US38914 A US 38914A US 3891460 A US3891460 A US 3891460A US 3218634 A US3218634 A US 3218634A
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cores
windings
row
matrix
pulses
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Expired - Lifetime
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US38914A
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English (en)
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Olsson Jons Kurt Alvar
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
    • H04M1/276—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using magnetic recording, e.g. on tape

Definitions

  • a number-sending device for calling frequently wanted subscribers to a telephone system, wherein there is generated in response to the operation of a button or a key a subscribers number-representing signal com-posed of a plurality of partial signals each of which represents a character of the subscriber number, the number-sending device comprising a storage matrix of magnetic cores, each of which cores is provided with a first winding, the first windings of all the cores in each row along one axis of the matrix being connected together for simultaneous energization, the states of the cores in each row representing a character stored in that row, and there being a respective contact actuated by means of said button or key associated with each of said rows, one side of which contact is connected to the first windings of that row, and each of which cores is provided with a second winding, the second windings of all the cores in each row along the other axis of the matrix being connected together, the device further comprising a chain of successively operated connecting stages,
  • the number-sending device shown in the figure is equipped with a set of thirty buttons, two of which are shown in the drawing and represented by K and M.
  • buttons two of which are shown in the drawing and represented by K and M.
  • the button K there are provided a number of contacts k1, k2 k6, which are actuated simultaneously by operation of the button K, and there is associated with the button K a ferromag netic memory arrangement in the form of a storage matrix of magnetic cores so arranged that the reading out of information stored in the matrix does not cause erasure of that stored information.
  • the rows of cores along the horizontal axis as shown in the figure will be hereinafter called the rows, and the rows of cores along the vertical axis will be called the columns.
  • Each core is provided with a first winding (reading winding), and the first windings of a row of cores in the matrix are connected in series to one side of a respective contact of the contacts k1 to k6.
  • the cores in the matrix are also provided each with a second winding (output winding), all the second windings of cores in one column being connected in series.
  • the embodiment shown in the figure has eight cores for each of the contacts k1 to k6.
  • the contact k2 for instance, is associated with the eight cores C21, C22 C28.
  • the first windings of the cores C21 to C28 connected in series are shown as a horizontal conductor L21, one end of which is connected to one side of the contact k2.
  • a column of series-connected second windings is schematically shown as a vertical conductor L8. These windings are wound on the cores C18, C28 C68 in the storage matrix associated with button K.
  • the second windings on the cores in the storage matrix belonging to the button M for example, Z918, Z128 I268, are connected in series with each other and the corresponding columns of the two matrices; for example, C18 to C68 and b18 to 1168 are also connected in series and to inputs of a signal-generating means G1, G2 G8 and F1, F2 F8, which means will be described later.
  • buttons K, M and also for the other buttons of the arrangement, there is provided a chain of successively operated connecting stages H, 1, 2 6 and S containing a number of stages corresponding at least to the number of characters in the subscribers number, which chain steps stage by stage during the generation of the subscribers number-representing signal, there being a respective stage associated with each row of the matrix being used, so that operation of any one stage causes the connection of its associated contact of the contacts k1, k2 k6, in the case of the button K, to a common pulse-generating means 11.
  • the connecting chain can be formed in a known way with a number of output conductors, one for each stage of the chain, which successively and during a short period of time are at a certain potential as the chain steps.
  • the contact k7 is connected in an input circuit to a starting means 10 common to all the buttons, which starting means is arranged to give a starting impulse to the common pulsegenerating means 11, which thus commences generation, and also to the initial stage H of the connecting chain H, 1, 2 6. Consequently, the chain steps first from the position S (the rest position) to the position H (the initial position), and then as pulses'are applied to it, works stage by stage through all the stages 1 to 6, and then stops again in the position S.
  • the stepping from position ,H to position S occurs as a result of trigger pulses from a further pulse generator PG, which provides pulses of one polarity and which is connected to all the stages 1 to 6 in the connecting chain through a make contact M81 and a gate VO opened by the starting means 10. Pulses from the pulse generator PG cause. the stepping of the stages upon reading out a stored subscribers number.
  • the signal-generating means G1 to G8 and F1 to F8 comprises eight signal generators G1 to G8, each of which provides an AC. output of a different frequency from the frequencies of the others. These generators are connected to a common output conductor L via the gates 21 to 28, respectively.
  • the gates 21 to 28 are normally held closed to the AC. outputs of the generators G1 to G8, but a gate opens when a direct voltage from One of the amplifiers F1 to F8 is fed to the gate; that is, the gate 22 passes the AC. output of the gen erator G2 to the line L when a direct voltage is applied to it from the amplifier F2.
  • Each of the amplifiers F1 to F8 is connected on the input side to one of the series connections of the previously mentioned second windings on the cores in the corresponding rows of the storage matrices. Consequently, the windings on the cores C18, C28 to C68 and M8, 1128 to 1768 are connected in series with each other (the vertical conductor L8) and to the input of the amplifier P8.
  • a device 12 which can be connected via a make contact 121 and a selector contact 122 to third windings provided on all the cores in each matrix, which third windings are all series connected.
  • the windings on all the cores in each column are series connected, and the columns are then series connected.
  • the windings n the cores C11 to C18 are indicated by the conductor L2 in the matrix associated with the button K.
  • a demagnetizing means 13 which is arranged to furnish a sinusoidal damped alternating voltage and which can be connected to one or more of a number of series connections of windings, comprising fourth windings (writing-in windings) on the cores, the fourth windings of the cores in one column of a matrix being connected in series and the corresponding columns in the matrices being also connected together.
  • One column of the seriesconnected fourth windings of the matrix of th button K is represented by the conductor L5, which is in turn connected to the fourth windings of the corresponding column of the matrix of the button M.
  • the series-connected columns of fourth windings are connected to the demagnetizing means 13 by operation of the keys J1 to 8.
  • All the cores of the storage matirx of the ferro-magnetic memory arrangement associated with the button K need first to be set at zero. This is done by setting the selector contact 122 in the position k and then closing the contact 121. Pulses from the device 12 put all the cores in the matrix into the magnetized state; that is, they are set at zero.
  • the writing in of the subscribers name now occurs digit by digit.
  • a sixfigure subscriber number can be written in.
  • the number value of each digit in the number is translated into a code, and the cores in the row of the matrix which corresponds to this digit are given conditions of mag netization in accordance with this code.
  • the code can be so arranged that 1 corresponds to XIIIXIII, where X is a demagnetized core and I is a magnetized core in the row.
  • the digit 2 corresponds to XIIIIXII
  • 3 corresponds to XIIIIIXI, and so on.
  • the chain HS is stepped forward to the stage 1 by pressing down the control button MS.
  • a glowing lamp farthest to the left in the lamp display LT shows that the stage 1 of the chain is now operated.
  • the gate VI is therefore opened, and pulses from the pulsegenerating means 11 are fed to all the cores in the row of the matrix associated with the contact k1.
  • the amplitude of the alternative positive and negative pulses from the pulse generator 11 is 1m, and this amplitude is less than that which is required to change the magnetizing condition of any core. This means that the cores of the row being fed with pulses are not influenced by the pulses from the pulse generator 11, and consequently they remain in the magnetized state.
  • the number value 1 is written in by pressing down the buttons J1 and J5.
  • the cores C11 and C15 are then influenced by the pulses of the pulse generator 11 as well as by the damped alternating current from the demagnetizing means 13; this alternating current has a maximum amplitude equal to Im.
  • the value Im is so chosen that 2Im exceeds what corresponds to the coercive force of the cores magnetized by the device 12. This means that the two cores C11 and C15 in the same upper row of the matrix are now in a substantially demagnetized stage as compared with the magnetized (set at zero) cores.
  • the chain HS is stepped forward to the stage 2 by again pressing the button MS.
  • a glowing lamp next to last at the left of the lamp display LT shows that stage 2 of the chain is now operated.
  • the gate V2 is thus opened and allows pulses from the pulse-generating means 11 to be fed to the first windings of the cores, represented by L21, associated with the contact k2.
  • the pulses are fed through the closed contact k2, and the number value 2 is Written in by pressing down the buttons J1 and J6, the changing of the states of the cores being as above described. In this way each digit is written in until the whole subscribers number is stored in the matrix.
  • Other subscribers numbers may be stored in the number-sending device by preparing other matrices in the same Way as has been described for the matrix associated with the button K.
  • a calling subscriber makes use of the described arrangement, the following occurs. If he calls a subscriber whose numebr is stored, for instance, in the matrix associated with the button M, when he presses button M the starting means emits a starting impulse to the pulse generator 11 and a starting impulse to the position H, and opens the gate V0.
  • the first pulse from PG steps the chain H-S to step 1, which opens the gate V1.
  • Pulses from the generator 11 can now pass V1 to the row of cores at the top of the memory (with cores I118, I228 Z168) belonging to the button M. Pulses are transmitted to the amplifiers F1, F2 F8 in accordance with a code corresponding to the first digit of the desired number, which digit previously was written in the memory circuit.
  • this arrangement is such that the application of the reading pulses to the cores in order to release the stored information does not erase the stored information, and hence rewriting in of a subscribers number is not necessary after reading out.
  • Apparatus for generating a coded combination of signals comprising a plurality of magnetizable cores, means for initially magnetizing each of said cores to a given state of magnetization, means for selectively demagnetizing selected cores of said plurality of cores magnetized to a given state of magnetization, means for exciting each of said cores with pulses of alternate magnetization of an amplitude insufiicient to overcome the coercive forces of any magnetized core but suflicient to cause an alternating magnetization in the selected demagnetized cores, and signal output means coupled to each of said cores for generating signals in response to the alternating magnetization.
  • each of said numbers being represented by a coded combination of signals comprising a storage matrix of magnetic cores arrayed in rows and columns, a common winding inductively coupled to every core of said matrix, a plurality of row windings, each of said row windings being inductively coupled to all the magnetic cores in one row of cores, respectively, a plurality of column windings, each of said column windings being inductivety coupled to all of the magnetic cores in one column of cores, respectively, a plurality of output windings, each of said output windings being inductively coupled to all of the magnetic cores in one of said columns, respectively, unidirectional current pulse-generating means selectively connectible to said common winding for generating a unidirectional current pulse of sufficient amplitude to magnetize all of said magnetic cores to a given state of residual magnetization with a given coercive force, alternate polarity current pulse-generating means for generating a current pulse of a first polarity followed by a current pulse of a second
  • said connecting means includes a plurality of gating means each including a signal output, a signal input and a control input, each of said gating means transmitting from its output the signal present at its input only when a control signal is present at its control input, means for connecting the signal output of each gating means to one of said row windings, respectively, means for connecting all the signal inputs of all of said gating means to said alternate polarity current pulse source, a chain of successively operating stages wherein only one stage operates at a time and the stages successively operate in response to stepping pulses, each stepping pulse causing the succeeding stage to operate and transmit a control signal, and means for connecting each stage to the control input of one of said gating means.
  • each of said gating means including a signal input, a signal output and a control input, each of said gating means transmitting from its signal output a signal present at its signal input only when a control signal is present at its control input, a plurality of tone signal generators, means for connecting each tone signal generator to the signal input of one of said gating means, respectively, and means for connecting each of said output windings to the control input of one of said gating means, respectively.
  • Apparatus for storing a plurality of numbers represented by coded combinations of states of magnetization comprising a storage matrix of magnetic cores arrayed in rows and columns, a common winding inductively coupled to every core of said matrix, a plurality of row windings, each of said row windings being inductively coupled to all the magnetic cores in one row of cores, respectively, a plurality of column windings, each of said column windings being inductively coupled to all of the magnetic cores in one column of cores, respectively, unidirectional current pulse-generating means selectively connectible to said common winding for generating a unidirectional current pulse of sufiicient amplitude to magnetize all of said magnetic cores to a given state of residual magnetization, alternating polarity current pulse-generating means for generating a current pulse of a first polarity followed by a current pulse of a second polarity, connecting means for connecting said alternating polarity current pulse-generating means sequentially to said row windings, damped alternating
US38914A 1960-04-13 1960-06-27 Magnetic core matrix arrangement employing readout from selected nonmagnetized cores Expired - Lifetime US3218634A (en)

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US (1) US3218634A (ja)
BE (1) BE601340A (ja)
DE (1) DE1142192B (ja)
GB (1) GB908870A (ja)
NL (1) NL260659A (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291917A (en) * 1963-06-13 1966-12-13 Nippon Comm Ind Co Ltd Automatic dialer for telephones having a magnetic memory
US3342943A (en) * 1963-04-23 1967-09-19 Int Standard Electric Corp Repertoire dialing system
CN113992303A (zh) * 2017-05-05 2022-01-28 中兴通讯股份有限公司 序列确定方法及装置、设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1184809C2 (de) * 1963-06-13 1973-07-26 Nippon Comm Ind Company Ltd Vorrichtung zum selbsttaetigen Waehlen von Zahlen
DE1288156B (de) * 1966-01-21 1969-01-30 Nippon Comm Ind Company Ltd Magnetkernnummernspeicher, insbesondere fuer Fernsprechnummern mit matrixartig angeordneten Magnetkernen und mit je einem Rangierdraht fuer jede gespeicherte Nummer alsLesedraht

Citations (15)

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US2499606A (en) * 1948-07-16 1950-03-07 Bell Telephone Labor Inc Preset type telephone dialer with pulse generating transformers
US2594325A (en) * 1950-08-09 1952-04-29 Bell Telephone Labor Inc Spaced pulse impulse sender
US2708267A (en) * 1953-12-31 1955-05-10 Ibm Record conversion system
US2861130A (en) * 1952-08-23 1958-11-18 Yanagida Yoichiro Automatic telephone calling apparatus
US2880278A (en) * 1954-10-18 1959-03-31 Albert F Vandenberg Automatic pulser
US2904636A (en) * 1955-12-22 1959-09-15 Bell Telephone Labor Inc Telephone circuit using magnetic cores
US2992416A (en) * 1957-01-09 1961-07-11 Sperry Rand Corp Pulse control system
US3008128A (en) * 1956-03-06 1961-11-07 Ncr Co Switching circuit for magnetic core memory
US3015813A (en) * 1958-05-02 1962-01-02 Gen Dynamics Corp Binary information decoder
US3048827A (en) * 1955-01-14 1962-08-07 Int Standard Electric Corp Intelligence storage equipment with independent recording and reading facilities
US3052872A (en) * 1956-11-05 1962-09-04 Zuse Kg Information storage device
US3069658A (en) * 1956-04-04 1962-12-18 Emi Ltd Matrix storage devices
US3074059A (en) * 1956-08-16 1963-01-15 Jr David B Flavan Multi-sequence pulse code transmitter
US3134967A (en) * 1960-11-04 1964-05-26 Honeywell Regulator Co Electrical apparatus
US3144640A (en) * 1957-03-21 1964-08-11 Int Standard Electric Corp Ferrite matrix storage

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499606A (en) * 1948-07-16 1950-03-07 Bell Telephone Labor Inc Preset type telephone dialer with pulse generating transformers
US2594325A (en) * 1950-08-09 1952-04-29 Bell Telephone Labor Inc Spaced pulse impulse sender
US2861130A (en) * 1952-08-23 1958-11-18 Yanagida Yoichiro Automatic telephone calling apparatus
US2708267A (en) * 1953-12-31 1955-05-10 Ibm Record conversion system
US2880278A (en) * 1954-10-18 1959-03-31 Albert F Vandenberg Automatic pulser
US3048827A (en) * 1955-01-14 1962-08-07 Int Standard Electric Corp Intelligence storage equipment with independent recording and reading facilities
US2904636A (en) * 1955-12-22 1959-09-15 Bell Telephone Labor Inc Telephone circuit using magnetic cores
US3008128A (en) * 1956-03-06 1961-11-07 Ncr Co Switching circuit for magnetic core memory
US3069658A (en) * 1956-04-04 1962-12-18 Emi Ltd Matrix storage devices
US3074059A (en) * 1956-08-16 1963-01-15 Jr David B Flavan Multi-sequence pulse code transmitter
US3052872A (en) * 1956-11-05 1962-09-04 Zuse Kg Information storage device
US2992416A (en) * 1957-01-09 1961-07-11 Sperry Rand Corp Pulse control system
US3144640A (en) * 1957-03-21 1964-08-11 Int Standard Electric Corp Ferrite matrix storage
US3015813A (en) * 1958-05-02 1962-01-02 Gen Dynamics Corp Binary information decoder
US3134967A (en) * 1960-11-04 1964-05-26 Honeywell Regulator Co Electrical apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3342943A (en) * 1963-04-23 1967-09-19 Int Standard Electric Corp Repertoire dialing system
US3291917A (en) * 1963-06-13 1966-12-13 Nippon Comm Ind Co Ltd Automatic dialer for telephones having a magnetic memory
CN113992303A (zh) * 2017-05-05 2022-01-28 中兴通讯股份有限公司 序列确定方法及装置、设备

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Publication number Publication date
NL260659A (ja)
GB908870A (en) 1962-10-24
BE601340A (fr) 1961-07-03
DE1142192B (de) 1963-01-10

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