US2962601A - Magnetic control system - Google Patents

Magnetic control system Download PDF

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Publication number
US2962601A
US2962601A US527493A US52749355A US2962601A US 2962601 A US2962601 A US 2962601A US 527493 A US527493 A US 527493A US 52749355 A US52749355 A US 52749355A US 2962601 A US2962601 A US 2962601A
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Prior art keywords
aperture
winding
flux
pulse
setting
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Expired - Lifetime
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US527493A
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English (en)
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Crane Hewitt David
Arthur W Lo
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RCA Corp
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RCA Corp
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Publication date
Priority to NL209388D priority Critical patent/NL209388A/xx
Priority to NL112780D priority patent/NL112780C/xx
Priority to BE550191D priority patent/BE550191A/xx
Priority to NL209696D priority patent/NL209696A/xx
Priority to US527493A priority patent/US2962601A/en
Application filed by RCA Corp filed Critical RCA Corp
Priority to DER19357A priority patent/DE1029414B/de
Priority to FR1172007D priority patent/FR1172007A/fr
Priority to GB23787/56A priority patent/GB833455A/en
Priority to CH350686D priority patent/CH350686A/de
Priority to FR1158184D priority patent/FR1158184A/fr
Priority to DK279156AA priority patent/DK112453B/da
Application granted granted Critical
Publication of US2962601A publication Critical patent/US2962601A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/80—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices
    • H03K17/82—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices the devices being transfluxors

Definitions

  • a tranfluxor includes a body of magnetic material having a rectangular hysteresis loop and having a plurality of flux paths provided therein.
  • a selected one of the flux paths has at least two portions each, respectively, in common with two other non-selected flux paths.
  • An A.C. (alternating current) signal is applied to a signal winding linking the selected path.
  • an output signal is induced in an output winding linking the selected path.
  • no signal is induced in the output winding.
  • a transfluxor can be considered to have two magnetic response conditions, namely, unblocked and blocked response conditions. The transfluxor remembers the response condition to which it is set for an indefinitely long period of time. No holding power is required.
  • Still another object of the present invention is to provide an improved magnetic control system having multiple flux paths which are substantially decoupled from each other under one response condition.
  • a further object of the present invention is to provide an improved magnetic system having a plurality of fiux paths so arranged that successive opposite polarity magnetizing forces can be applied to one flux path, wherein only the first of these magnetizing forces produces a flux change in another of the flux paths having a portion common to the one flux path.
  • Yet another object of the present invention is to provide an improved magnetic system having a plurality of fiux paths so arranged that signals can be propagated in either direction by actuating either one of two difierent flux paths.
  • the above and further objects of the present invention are carried out by providing a plurality of apertures including a blocking aperture, a setting aperture and an output aperture so arranged in magnetic material having a rectangular hysteresis loop that all setting signals subsequent to a first setting pulse are confined to a path about the setting aperture which does not enclose the other apertures.
  • the selected path is the one taken about the ouput aperture.
  • Fig. 1 is a schematic diagram of a magnetic system according to the invention, employing a transfluxor having an individual setting aperture and an individual output aperture located in the magnetic material about the blocking aperture;
  • Fig. 2 is a cross-sectional view along the line 2-2 of the transfluxor of Fig. 1;
  • Figs. 3a-3c are diagrams useful in explaining the operation of the transfluxor of Fig. l.
  • Fig. 4 is a schematic diagram of a magnetic system according to the invention, employing a transfluxor having a setting and an output aperture each position on the horizontal center-line of the transfluxor.
  • a tranfluxor 10 is made from a magnetic material having a rectangular hysteresis loop.
  • the material is in the form of an annular core, and the central aperture 12 of the core is used as a blocking aperture.
  • the material is preferably of uniform thickness, as in the transfluxor 10.
  • a setting aperture 14 and an output aperture 16 are located in the material and have their respective centers located along a horizontal and vertical center-line of the transfluxor 10, as viewed in Fig. 1.
  • the diameter of the blocking aperture 12 is made larger than that of either the setting and the output apertures, for reasons set forth hereinafter.
  • the material between the blocking aperture 12 and the setting aperture 14 forms a leg 1.
  • the material between the setting aperture 14 and the periphery of the transfluxor 10 forms a leg 2.
  • the cross-sectional areas of the legs taken through their most restricted portions, in the case of legs 3 and 4, for example, conveniently'along a centerline of the transfluxor 10, are equal.
  • the crosssectional area of the most restricted portion of the annular ring which may be taken, for example, as the leg 5 at the lower portion of the material of the transfluxor 10, is at least equal to the sum of the minimum crosssectional areas of two of the legs adjacent either one of the smaller apertures.
  • a cross-sectional view of the transfluxor 10 taken along the horizontal center-line 2--2 is shown in Fig. 2.
  • the thickness 1 of the transfluxor 10 may be uniform throughout.
  • a suitable magnetic material having a substantially rectangular hysteresis loop may be, for example, manganese-magnesium ferrite.
  • a blocking winding 18 is wound through the blocking aperture 12 by threading the blocking winding 18 beginning with the terminal 18a across the top surface (the exposed surface as viewed in Fig. l) of the transfluxor 10, then downwardly through the blocking aperture 12, then along the bottom surface of the transfluxor to the terminal 181;.
  • the terminals of the blocking winding 18 are connected to a blocking pulse source 20.
  • a setting winding 24 is wound through the setting aperture 14 by threading the setting winding beginning with the terminal 24b across the top surface of the transfluxor 10, then downwardly through the setting aperture 14, thence along the bottom surface of the transfluxor It) to the terminal 24a.
  • the terminals of the setting winding 24 are connected to a setting pulse source 26.
  • An input winding 28 and an output winding 30 are wound through the output aperture 16 by threading these windings beginning with their respective terminals'28a and 39a across the top surface of the transfiuxor 10, then downwardly through the output aperture 16, then across the bottom surface to the terminals 28b and 30b, respectively.
  • An input signal source 32 is connected to the terminals 28a and 28b of the input winding 28; and a utilization device 34 is connected to the terminals 30a and 30b of the output winding 30.
  • a priming winding 36 is wound through both the output aperture 16 and the blocking aperture 12 by thread ing the priming winding beginning with a terminal 36a thereof across the bottom surface of the transfluxor 10, then upwardly through the output aperture 16, then across the top surface of the transfiuxor 10, then downwardly through the blocking aperture 12, and then across the bottom surface of the transfluxor 10 to the terminal 36b.
  • the one terminal 36a of the priming winding 36 may be connected to a priming pulse source 38.
  • the other terminal 36b of the priming winding 36 may be connected to a common conductor, indicated in the drawing by the conventional ground symbol.
  • the priming pulse source 38 is also connected to the common ground.
  • each of the sources herein are preferably constant current sources such as pentode type vacuum tube circuits.
  • the positive direction of current flow (conventional) in any source winding is indicated by the arrow adjacent the winding.
  • the blocking pulse source 20 is arranged to furnish a pulse of one polarity, for example, positive, to the blocking winding 18.
  • the setting pulse source 34 is arranged to furnish pairs of pulses comprising a first posi' tive polarity pulse and a second negative polarity pulse to the setting winding 24.
  • the input signal source 32 may be arranged to furnish pairs of pulses; one pulse of the pair is of one polarity and the other pulse of a pair is of the opposite polarity.
  • the priming pulse source 38 is arranged to furnish a positive polarity pulse to the priming winding 26.
  • the utilization device 34 may be any device responsive to the signal induced in the terminals of the output winding 30.
  • One state of saturation, with reference to a closed path, is that in which the saturated flux is oriented in a clockwise sense around the path; and the other state of saturation, with reference to that path, is that in which the saturating flux is oriented in the counter-clockwise sense (as viewed from the same side of the surface) around the closed path.
  • Fig. 1 One manner of operating the system of Fig. 1 is as follows: Assume that the blocking pulse source 20 is operated to cause a positive current pulse 38 to flow in the blocking winding 18. The amplitude of this positive current is made suflicient to establish a clockwise flux saturation throughout each of the legs 1 to 4, inclusive, with reference to the blocking aperture 12. The flux orientation in the respective legs upon the termination of the blocking current is indicated by the arrows of the diagram of Fig. 3a. A pair of arrows is placed in the leg 5 to indicate that the leg contains the sum of the fluxes in the legs 1 and 2 which is equal to the sum of the fluxes in the legs 3 and 4. Note that, with respect to the individual paths about each of the smaller apertures, the flux in either of the two adjacent legs is oriented in opposite senses with respect to the aperture bounded by the two legs.
  • Each of the windings linked by the changing flux has a voltage induced across its terminals.
  • the windings can be considered to be open-circuited when the blocking pulse is applied, and therefore no current flow is produced by the induced voltage.
  • the input signal source 32 is operated to apply a pair of pulses comprising in sequence a negative pulse 40 and a positive pulse 42 to the input winding 28.
  • Neither one of the pair of input pulses produces a flux change in the path about the output aperture 16 because the one or the other of the legs 3 and 4 is already saturated with flux oriented in the direction of the magnetizing force generated by the one or the other of the pair of pulses 40 and 42.
  • the amplitude of the negative pulse 44) is limited, as pointed out more fully hereinafter. Accordingly, the pair of input pulses does not induce any voltage across the terminals of the output winding 30 because no flux change is produced in the path about the output aperture 16.
  • An indefinite number of pairs of input pulses can be applied without producing any output signals.
  • the amplitude of the negative input pulse 40 is restricted to a value less than that required to generate sufiicient magnetizing force to produce a flux change in the longer path about both the blocking aperture 12 and the output aperture 16, including the legs 1, 4 and 5.
  • the negative pulse tends to produce a flux change from the initial clockwise to the counter-clockwise sense, with reference to the output aperture 16, in these legs. Spurious unblocking of the transfluxor by an input pulse is avoided by so restrict ing the amplitude of the negative input pulse 40.
  • the permissible amplitude of the negative input pulse 40 can be increased. Note that the amplitude of the positive input pulse 42 can be indefinitely large because each of the legs 1, 4 and 5 is already saturated in the clockwise sense with reference to the output aperture 16.
  • the transfluxor 10 can be placed in an unblocked condition by operating the setting pulse source 26 to apply a positive setting pulse 44 to the setting winding 24.
  • This positive setting pulse produces a flux change in the legs 3, 2 and 5, from the clockwise to the counter-clockwise sense, with reference to the blocking aperture 12.
  • No flux change is produced in the leg 1 by the setting pulse because the leg 1 is already saturated with flux oriented in the counter-clockwise sense with reference to the setting aperture 14.
  • the flux orientation in the various legs resultingfrom the positive settingv pulse 44 isindicated in Fig. 3b; the dotted arrows indicating the directions of flux which has changed.
  • the blocking pulse source 20 and the priming pulse source 38 may be open-circuited when the setting pulse is applied. Thus, no current flow is produced in the blocking and the priming windings 18 and 36 by the setting pulse.
  • the flux configuration in the legs 1 and 2 resulting from the negative setting pulse 46 is indicated in Fig. 3c, the dotted arrows indicating the flux just changed. No flux change is produced in the longer path about the blocking aperture 12 when the negative setting pulse is applied, because all the flux change in the leg 2 is absorbed in the equal and nearby leg 1. Consequently, the negative setting pulse 46 does not induce any voltage in the remaining windings linked to the transfiuxor 10.
  • the flux configuration thus established serves to effectively decouple the setting winding 24, and hence the setting pulse source 26, from the other windings and sources of the transfluxor 10.
  • the initial positive setting pulse 44 can be prevented from producing any current flow in the blocking winding 18 and the priming winding 36 by momentarily inserting a high impedance, or substantially disconnecting these windings by a suitable switch means.
  • a high impedance results momentarily by connecting a suitably poled unilateral conducting device (not shown) in series with the respective windings.
  • the flux orientation in the legs 3 and 4 about the output aperture 16 is still in the same clockwise sense, with reference to the output aperture. Therefore, input signals applied to the input winding 28 still induce corresponding signals in the output winding 30.
  • the transfluxor 10 can be returned to a blocked response condition by applying a new positive pulse to the blocking winding 18 to return the flux orientation in the respective legs back to the clockwise sense, with reference to the blocking aperture 12. Observe that no flux change is produced in the leg 2 by the second and subsequent blocking pulses because the flux in this leg is already oriented in the clockwise sense with respect to the blocking aperture 12. Therefore, the second and subsequent blocking pulses do not induce any voltage across the terminals of the setting winding 24.
  • the flux orientation in the respective legs following the second blocking pulse is the same as that indicated in the diagram of Fig. 3a.
  • the setting winding 24 remains decoupled from any of the other windings until after a new blocking pulse 38 is applied; and after the next pair of setting pulses succeeding the new blocking pulse, the setting winding 18 is again decoupled. It is often desirable to incorporate a transfluxor 10 arranged for such decoupling into system applications where interaction between various sources is undesired.
  • Asymmetrical drive may be used, if desired, by operating the priming pulse source 38 to apply a small amplitude positive priming pulse 48 before each positive input pulse 42.
  • the priming pulse 48 replaces the negative input pulse 40.
  • a relatively large power can be delivered to the utilization device 34 each time the relatively large 6 amplitude pulse 42 is applied.
  • the setting and output apertures in the material may be located at various positions about the blocking aperture 12.
  • the angular spacing between the two smaller apertures is not critical.
  • the portion of material separating the smaller apertures should contain sufficient material so that the flux path about the setting aperture is separate from the flux path about the output aperture.
  • the angle of separation may also be enlarged to For example, both small apertures 14' and 16' may be located along the horizontal center-line of an annular core, as shown in Fig. 4, for the transfluxor 10.
  • primed reference characters indicate parts similar to those indicated by like, unprimed reference characters of the transfiuxor 10 of Fig. l.
  • first pulse source 56 may be used for selectively coupling a first pulse source 56 to a first signal device 60, or a second pulse source 62 to a second signal device 68 by operating one of the signal devices to supply setting pulses.
  • a first pulse source 56 may be used for selectively coupling a first pulse source 56 to a first signal device 60, or a second pulse source 62 to a second signal device 68 by operating one of the signal devices to supply setting pulses.
  • only one of the pulse sources is operated at any given time.
  • the blocking pulse source 20 is operated to apply a positive blocking pulse to the blocking winding 18', thereby placing the transfiuxor 10' in a blocked response condition.
  • the first signal device 60 is operated to apply a positive and then a negative setting pulse to a first signal winding 58 wound through the first smaller aperture 14'.
  • the positive setting pulse produces a flux change along the path including the legs 4 and 2 and the transfiuxor 10' is unblocked.
  • the second pulse source 62 is then coupled to the second signal device 68 by means of the flux path about only the second smaller aperture 16.
  • the suc ceeding, negative setting pulse applied by the first signal device 60 produces a flux change only in the path about the first smaller aperture 14'.
  • the first signal winding 58 and the first input winding 59 are decoupled from each of the other windings due to the flux chauge produced in the legs 3 and 4 by the negative setting pulse applied by the first signal device 60.
  • a second reset pulse applied by the blocking pulse source 20' returns the transfluxor 10' to the blocked response condition.
  • the first pulse source 56 is now coupled to the first signal device 60 by operating the second signal device to apply a positive setting pulse followed by a negative setting pulse to the second signal winding 66.
  • the positive setting pulse produces a flux change along the path including the legs 1 and 3; the succeeding negative setting pulse produces a flux change along the path including the legs 1 and 2.
  • signals applied to the first input winding 59 by the first pulse source 56 induced corresponding signals in the first signal winding 53.
  • the second input and signal windings 64 and 66 are substantially decoupled from the blocking winding 18', and the first input and second signal windings 59 and 58, respectively, due to the counter-clockwise flux orientation in the path about the second smaller aperture 16'.
  • the setting is completely symmetrical with respect to the two smaller apertures.
  • first, smaller aperture 14' When the first, smaller aperture 14' is employed as a setting aperture, information is essentially propagated from left to right. That is, when setting pulses are applied to the first signal winding 58, output signals are furnished on the second signal winding 66.
  • second, smaller aperture 16 When the second, smaller aperture 16 is used as a setting aperture, information is propagated essentially from right to the left. That is, when setting signals are applied to the second signal winding 66, output signals are furnished on the first signal winding 58.
  • the setting winding and, consequently, the setting pulse source is decoupled from any other pulse sources used in operating the transfluxor.
  • the signals applied to the input winding may be pulse type signals, or may be continuous signals such as sinusoidal type signals.
  • a magnetic device comprising a core of magnetic material having two remanent states, said core having a central aperture, said core having second and third other apertures therein each through a portion of the core between the inner and outer radial dimensions thereof, said central aperture being located between said second and third apertures, separate first and second winding means wound through said second aperture, a third winding means wound through said third aperture, a first means for producing a magnetic flux in the portions of material on both sides of said central and in the portions of material on both sides of said other apertures in one sense with reference to said central aperture, and means for applying in sequence a first excitation of one polarity and a second excitation of the opposite polarity to said third winding means, said first excitation producing a flux reversal along a path including said third and central apertures, and said second excitation producing a fluxreversal around said third aperture.
  • a magnetic device comprising a core of magnetic material having two remanent states, said core having a central aperture, said core having second and third apertures therein each through a portion of the core between the inner and outer radial dimensions thereof, separate first and second winding means wound through said second aperture, a third winding means wound through said third aperture, means including a winding means wound through said central aperture for producing a magnetic flux in said core portions on both sides of each of said apertures in one sense with reference to said central aperture, and means for applying in sequence a first excitation of one polarity and a second excitation of the opposite polarity to said third winding means, the magnetizing force generated by said first excitation producing a flux change about said central and third apertures, and the magnetizing force generated by said second excitation producing a flux change only about said third aperture.
  • a magnetic device comprising a core of magnetic material having two remanent states, said core having a central aperture, said core having second and third apertures therein each through a portion of the core between the inner and outer radial dimensions thereof, separate first and second windings wound through said second aperture, a third winding wound through said third aperture, a fourth winding wound through said second aperture and said central aperture, a first means for producing a magnetic flux on both sides of said central aperture and on both sides of said second and third apertures in one sense, and means eifective to apply a first excitation of one polarity and a second excitation of the opposite polarity to said third winding.
  • a magnetic device comprising an annularly shaped core of magnetic material having two remanent states, said core having, in addition to its central aperture, second and third apertures therein extending through a portion of the core between the inner and outer radial dimensions thereof, said second and third apertures being so located in the material that the cross-sectional areas at the most restricted portions between the inside surfaces of the respective second and third apertures and the inner and outer radial dimensions of the core are substantially equal, separate first and second winding means wound through said second aperture, a third winding means wound through said third aperture, a first means for producing a magnetic fiux in said cross-sectional areas in one sense, and means effective to apply a first excitation of one polarity and a second excitation of the opposite polarity to said third winding means, said first excitation producing a flux change along one flux path in said core, and said second excitation producing a flux change along another flux path in said core.
  • a magnetic device comprising an annularly shaped core of magnetic material having two remanent states, said core having a central aperture, said core having second and third apertures therein each through a portion of the core between the inner and outer radial dimensions thereof, the inner radial dimension of said central aperture being substantially larger than the radial dimension of any one of said first and second apertures, separate first and second winding means wound through said second aperture, a third winding means wound through said third aperture, a first means for producing a magnetic flux completely around said core in one sense with reference to said central aperture, and means effective to apply in sequence a first excitation of one polarity and a second excitation of the opposite polarity to said third winding means, said first excitation serving to couple said first and second winding means through the magnetic material about said first aperture, and said second excitation serving to substantially decouple said third winding means from any other of the said winding means coupled to said core.
  • a magnetic device comprising a core consisting of substantially rectangular hysteresis loop magnetic material having a central aperture, said core having first and second apertures therein each through a portion of the core between the inner and outer radial dimensions thereof, separate first and second windings wound through said second aperture, a third winding wound through said third aperture, a first means for producing a magnetic flux in the portions of material on both sides of said central and in the portions of material on both sides of said first and second apertures in one sense with reference to said central aperture, means for applying a first excitation of one polarity and a second excitation of the opposite polarity to said third winding, the magnetizing force generated by said first excitation producing a flux change about said central and third apertures, and the magnetizing force generated by said second excitation producing a flux change about said third aperture only, and means for applying alternating polarity input signals to said first winding, said signals causing output signals to be induced in said second winding upon activation of said third Winding.
  • a magnetic device comprising a core of magnetic material having two remanent states, said core having a plurality of apertures therein including a central aperture and second and third apertures, said second and third apertures extending through a portion of the core between the inner and outer radial dimensions thereof, separate first and second winding means Wound through said second aperture, a third winding means exclusively wound through said third aperture, a fourth winding means wound through said second aperture and said central aperture, and means for applying signals alternately in time to said first and fourth winding means, respectively.
  • a magnetic device comprising an annularly shaped core consisting of magnetic material characterized by having a substantially rectangular hysteresis loop having a central aperture, said core having second and third other apertures each through a portion of the core between the inner and outer radial dimensions thereof, separate first and second windings wound through said second aperture, a third winding wound through said third aperture, an additional winding wound through said central aperture, means for applying an excitation of one polarity to said additional winding for producing a magnetic flux in one sense completely around said core, and
  • a magnetic device comprising a body of magnetic material having a central aperture and second and third other apertures, said other apertures being located in said body adjacent to said central aperture, the material around said central aperture being characterized by having a substantially rectangular hysteresis loop, separate first and second windings wound through said second aperture, a third winding wound through said third aperture, means including an additional winding wound through said central aperture for producing a magnetic flux encompassing said central and other apertures in one sense, with reference to said central aperture, and means for applying in sequence a first excitation of one polarity 10 and a second excitation of the opposite polarity to said third Winding, said first excitation producing a flux change along one flux path in said body, and said second excitation producing a flux change along another flux path in 5 said body.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Magnetic Treatment Devices (AREA)
US527493A 1955-08-10 1955-08-10 Magnetic control system Expired - Lifetime US2962601A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
NL209388D NL209388A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1955-08-10
NL112780D NL112780C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1955-08-10
BE550191D BE550191A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1955-08-10
NL209696D NL209696A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1955-08-10
US527493A US2962601A (en) 1955-08-10 1955-08-10 Magnetic control system
FR1172007D FR1172007A (fr) 1955-08-10 1956-07-31 Dispositifs logiques à noyaux magnétiques
DER19357A DE1029414B (de) 1955-08-10 1956-07-31 Magnetische Einrichtung
GB23787/56A GB833455A (en) 1955-08-10 1956-08-01 A magnetic device of the transfluxor type
CH350686D CH350686A (de) 1955-08-10 1956-08-07 Transfluxor
FR1158184D FR1158184A (fr) 1955-08-10 1956-08-07 Dispositif magnétique, notamment pour la commande, la conservation ou la commutation de signaux électriques
DK279156AA DK112453B (da) 1955-08-10 1956-08-08 Elektronisk register med magnetiske lagerelementer.

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US527493A US2962601A (en) 1955-08-10 1955-08-10 Magnetic control system

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US2962601A true US2962601A (en) 1960-11-29

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US (1) US2962601A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE550191A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH350686A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1029414B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DK (1) DK112453B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (2) FR1172007A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB833455A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (3) NL112780C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869112A (en) 1955-11-10 1959-01-13 Ibm Coincidence flux memory system
DE1234262B (de) 1956-10-30 1967-02-16 Ibm Deutschland Anordnung zum Realisieren der logischen ODER-ABER-Funktion
NL112900C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1956-10-31
DE1146532B (de) * 1960-02-06 1963-04-04 Standard Elektrik Lorenz Ag Schaltungsanordnung zur Bestimmung der Polaritaet eines in einem Ferritkern-speicher eingespeicherten Markierimpulses

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US2284406A (en) * 1940-03-01 1942-05-26 Gen Electric Transformer
US2519429A (en) * 1947-04-22 1950-08-22 Carl S Brandvold Bumper for automotive vehicles
US2682632A (en) * 1949-05-20 1954-06-29 Gen Electric Magnetic amplifier circuit
US2708219A (en) * 1952-06-25 1955-05-10 Cgs Lab Inc Electrically variable reactance keying or switching apparatus
US2802953A (en) * 1955-04-25 1957-08-13 Magnavox Co Magnetic flip-flop
US2820109A (en) * 1952-03-22 1958-01-14 Cgs Lab Inc Magnetic amplifier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284406A (en) * 1940-03-01 1942-05-26 Gen Electric Transformer
US2519429A (en) * 1947-04-22 1950-08-22 Carl S Brandvold Bumper for automotive vehicles
US2682632A (en) * 1949-05-20 1954-06-29 Gen Electric Magnetic amplifier circuit
US2820109A (en) * 1952-03-22 1958-01-14 Cgs Lab Inc Magnetic amplifier
US2708219A (en) * 1952-06-25 1955-05-10 Cgs Lab Inc Electrically variable reactance keying or switching apparatus
US2802953A (en) * 1955-04-25 1957-08-13 Magnavox Co Magnetic flip-flop

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Publication number Publication date
FR1158184A (fr) 1958-06-11
FR1172007A (fr) 1959-02-04
DE1029414B (de) 1958-05-08
NL209388A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB833455A (en) 1960-04-27
NL112780C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH350686A (de) 1960-12-15
DK112453B (da) 1968-12-16
BE550191A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL209696A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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