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6972982 |
Ring-shaped prism of a holographic ROM system
A holographic system for storing data on an interference pattern in a hologram storage medium includes a light source for emitting a laser beam, a beam splitter, modulating means and a refractive...
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5072421 |
Magnetic memory and recording-reproducing method for the magnetic memory
A magnetic memory has a substrate, a magnetic film provided on the substrate including a recording medium capable of producing a recording carrier, and a light waveguide layer on the magnetic film...
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5014239 |
Magnetic bubble generator using plural conductors with common current source
In a magnetic bubble generator having an ion-implanted track (1), a conductor pattern is composed of hairpin conductor patterns (5, 6) of two layers with an insulating layer (12) interlaid, and a...
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4720814 |
Magnetic bubble generator for bubble memory in hybrid technology
The bubble memory comprises a magnetic layer in which the magnetic bubble can move under the action of a rotary field, a deposited pattern formed from a high permeability magnetic material and...
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4694424 |
Combined nucleate-replicate single wall domain generate structure
A bubble generator for use in a bubble memory device combines a nucleating generator and replicating generator in a unified structure with first and second hairpins disposed at respective first and...
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4554464 |
Propagation delay generator
A propagation delay generator is provided for controlling the duration of a bubble generate waveform of a bubble memory system. A first means is responsive to a digital input signal and provides an...
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4550389 |
Apparatus and method for switching a magnetic domain lens
A magnetic domain device has at least one post element formed from a material that exhibits magnetic domain characteristics and that is positioned on a nonmagnetic substrate material. A pair of...
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4525807 |
Magnetic bubble store with non-implanted motifs and method for controlling the same
A magnetic bubble store, using adjoining non-implanted motifs as bubble-propagating motifs, the store comprising 3n identical, electrically interconnected storage devices, n being a positive...
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4504928 |
Current ramp generator
A current ramp generator is provided for controlling the fall time of a bubble generate waveform of a bubble memory system. Gate circuitry is responsive to a digital input signal and provides an...
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4388700 |
Nucleation bubble generator for bubble domain devices
A magnetic bubble domain device nucleation source for producing magnetic bubble domains is disclosed, in which bubble domains along with possibly unwanted duplicate bubble domains are produced in...
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4257109 |
Bubble nucleator
A bubble (domain) generator comprising a pair of relatively long elements of suitable magnetic material, such as permalloy, separated by a narrow gap, near which bubbles will be generated in the...
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4152776 |
Magnetic bubble memory circuit with input swap and output replicate gates
Magnetic bubble domain memory circuit in which magnetizable overlay patterns of magnetically soft material, e.g. permalloy, are provided as bubble propagation elements on a bubble-supporting...
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4128895 |
Magnetic wall assisted bubble domain nucleator
An improved magnetic bubble domain nucleator is provided which uses a magnetic wall, such as a charged wall, Neel wall, or Bloch wall, to assist nucleation. In a preferred embodiment, a magnetic...
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4120042 |
Magnetic bubble information writing device
A magnetic bubble information writing device capable of carrying out writing without erasing old information representing either "0" or "1" at a location, where new information is to be written, by...
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4101971 |
Magnetic bubble information writing device
A magnetic bubble information writing device in which a conductor loop is disposed on the magnetic bubble propagation circuit and in which magnetic bubbles are generated by sending pulse current...
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4086661 |
Cylindrical magnetic domain element
A cylindrical magnetic domain element is disclosed which utilizes a cylindrical magnetic domain (a magnetic bubble) produced by the application of a bias magnetic field to a magnetic sheet of...
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4086571 |
Magnetic bubble domain generator and annihilator
Magnetic bubble domain generator and annihilator for use in a magnetic bubble domain memory device of the major-minor bubble propagation path type. The magnetic bubble domain generator and...
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4058799 |
Block oriented random access bubble memory
A block oriented random access memory (BORAM) magnetic bubble domain system which provides increased throughput of information and reduced access or read time for the same information as compared...
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4056812 |
Fault tolerant magnetic bubble memory
A field-access, magnetic bubble memory organized in a major-minor configuration includes an extra set of minor loops dedicated to fault correction. The loops of the extra set are coupled to a major...
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4040020 |
Bubble lattice device
A device adapted for use in a low externally applied magnetic field, for example, 15 Oe, with a bubble lattice system is described. The device has a Y shaped channel in which bubbles are propagated...
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4040038 |
Column accessing of elements in confined arrays
A technique for accessing interactive elements, such as magnetic bubble domains, which are in confined arrays where the elements are located with respect to one another in accordance with...
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4008463 |
Integrated bubble nucleator
A nucleator for producing reverse magnetized domains in an amorphous magnetic material capable of supporting such domains. The nucleator is comprised of a current carrying conductor whose current...
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4004287 |
Hollow magnetic domain recording device
A recording device in which hollow magnetic domains are produced in plates of, for example, orthoferrite by means of a magnetic field. The region within which the field can vary without said...
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4001673 |
Method of testing and repairing magnetic bubble domain chip
A method of both testing all loops of a long serial magnetic bubble domain chip, and repairing the chip for automatic bypass of defective loops. Each repair station associated with each loop is...
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3996577 |
Method and apparatus for the controlled generation of wall-encoded magnetic bubble domains
A magnetic layer is exchange coupled to a bubble medium in an area where bubble domains are nucleated, and is used together with or without an externally applied in-plane magnetic field to...
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3975710 |
Character pattern recognition method and apparatus using feature enhanced magnetic domain patterns
A character pattern recognition method and apparatus for recognizing an unknown character pattern in accordance with a correlation between the unknown character pattern and each known standard...
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3967002 |
Method for making high density magnetic bubble domain system
A method for making a high density magnetic bubble domain system including the functions of read, write, storage, transfer, and annihilation. Only three masking steps are required, of which only...
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3946372 |
Characteristic temperature-derived hard bubble suppression
Normal single wall magnetic or "bubble" domains are generated in bubble domain materials without generating hard bubble domains by selecting the composition based upon a predetermined minimum...
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3938111 |
Magnetic device for producing domains
Magnetic device comprising at least one thin layer of a magnetisable material which has a preferred direction of magnetisation substantially at right angles to the surface of the layer. Magnetic...
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3938110 |
Method of controlling magnetic strip domains
A method of controlling magnetic strip domains is disclosed wherein a magnetic material having at least one ion-implanted region is placed under a bias magnetic condition which permits magnetic...
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3930244 |
Bubble domain lattice buffer arrangement
Bubble domains in an enclosed lattice are translated for data accessing and buffered by providing stripe domains on both ends of a bubble lattice parallel to the direction of the bubble domain...
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3916396 |
Bubble domain circuit
A magnetic bubble domain memory of the major loop and minor loop type is constructed of thin film elements placed on an orthoferrite or the like material for retaining bubble domains. The pattern...
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3916395 |
Cylindrical magnetic domain storage device having wave-like magnetic wall
The present invention relates to a magnetic storage device for use in an information handling system including an electronic computer. More specifically, the present invention relates to a magnetic...
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3913079 |
Magnetic bubble domain pump shift register
A propagation means for moving interactive elements, such as magnetic bubble domains in a magnetic medium, which comprises a very simple structure that can be used under many bias field conditions....
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3911411 |
Magnetic domain systems using different types of domains
A magnetic bubble domain system using dual size bubble domains which can exist in a magnetic sheet at the same time, and which can be manipulated without changing their character. Additionally,...
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3905040 |
Magnetic domain storage disk
A storage system uses a plate of magnetic material having a two-dimensional regular array of positions in which a domain can each time be written and read by light radiation. The plate rotates at a...
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3899779 |
Magnetic bubble domain system using different types of domains
A magnetic bubble domain system using different types of magnetic bubble domains for representation of information. Different domain types are characterized by different numbers of vertical Bloch...
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3899780 |
Magnetic bubble store having optical centering apparatus
A storage system comprising a plate of magnetic material with a two-dimensional regular array of positions. A domain can be written and read in each of said positions by means of electromagnetic...
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3876996 |
Method of generating cylindrical magnetic domains
There is disclosed a method and apparatus for the formation of cylindrical uniaxial domains or magnetic bubbles in a sheet of magnetic material characterized by a preferred direction of...
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3836895 |
OPTO-MAGNETIC MEMORY
A device for the magnetic storage of data which comprises a plate of a magnetizable material having a periodic structure of magnetic domains. Recording data occurs with an external magnetic field...
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3831154 |
SINGLE AND POLYCRYSTALLINE SEMICONDUCTORS
A class of either single crystal or polycrystalline ferromagnetic materials containing an iron oxide whose resistivity vs. temperature characteristic is such that the resistivity decreases...
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3824571 |
MAGNETIC BUBBLE GENERATION
A magnetic bubble generator device is provided for nucleating magnetic bubbles in a wafer of magnetic material. The device includes an arrangement of permalloy elements which generate fringing...
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3824570 |
MAGNETO-OPTICAL TRANSDUCER USING BUBBLE DOMAINS
A device for converting image information into magnetic information including a light source for projecting an image of the image information onto a plate of magnetic material capable of...
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3811119 |
METHOD FOR GENERATING HOLLOW MAGNETIC BUBBLE DOMAINS
By suitably pulsing a coil overlying a magnetic film or platelet in which magnetic bubble domains exist, the domains within the coil reverse their magnetization vectors with respect to bubble...
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3810131 |
DEVICES EMPLOYING THE INTERACTION OF LASER LIGHT WITH MAGNETIC DOMAINS
Focused laser light, when partially absorbed to cause localized heating in low coercivity magnetic layers of the type used in conventional bubble devices, is employed to manipulate bubble and strip...
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3789375 |
SINGLE WALL DOMAIN NUCLEATOR
A new mechanism for bubble domain generation permits nucleation with less power than previously expected. A nucleation pulse of a particular form enables the mechanism to be employed without...
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3786452 |
SINGLE WALL DOMAIN GENERATOR
The number of magnetic bubbles generated thermally by a pulsed laser beam has been found to be a function of the diameter of the beam leading to a useful bubble generator.
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3763477 |
MAGNETIC DOMAIN LOGIC CONTROL ARRANGEMENT
A magnetic domain logic control arrangement utilizing the timed relationship of domains along a channel is realized by a magnetically soft overlay geometry which controls the movement of single...
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3761886 |
CONTENT ADDRESSABLE DISCRETE DOMAIN MASS MEMORY
A magnetic bubble mass memory which combines a plurality of storage loops with bubble logic to provide direct interrogation and manipulation of the stored information, without the requirement for...
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3760387 |
MAGNETIC BUBBLE DOMAIN SYSTEM USING MULTIPLE MAGNETIC SHEETS
A magnetic bubble domain system in which a single magnetic sheet, or a plurality of magnetic sheets, is used only for storage of information, while another magnetic sheet (memory sheet) is used for...
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