GB840749A - Improvements in or relating to ferromagnetic devices - Google Patents

Improvements in or relating to ferromagnetic devices

Info

Publication number
GB840749A
GB840749A GB12718/57A GB1271857A GB840749A GB 840749 A GB840749 A GB 840749A GB 12718/57 A GB12718/57 A GB 12718/57A GB 1271857 A GB1271857 A GB 1271857A GB 840749 A GB840749 A GB 840749A
Authority
GB
United Kingdom
Prior art keywords
core
magnetic
hysteresis loop
windings
april
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
Application number
GB12718/57A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB840749A publication Critical patent/GB840749A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/06—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element
    • G11C11/06007—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element using a single aperture or single magnetic closed circuit
    • G11C11/06078—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element using a single aperture or single magnetic closed circuit using two or more such elements per bit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds
    • H01F1/0315—Ferrites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

840,749. Magnetic storage devices; magnetic compositions. STANDARD TELEPHONES & CABLES Ltd. April 18, 1957 [April 27, 1956], No. 12718/57. Class 38 (2). A magnetic device for storage or similar purposes comprises a magnetic core A 1 having a moderately rectangular hysteresis loop C 1 and a core A 2 having a "round" hysteresis loop C 4 which are associated with input windings n 1 , n 2 in series or parallel and output windings N 1 , N 2 in series opposition such that the combination exhibits a very square hysteresis loop C 2 . Over-compensation C 3 is also shown. The resultant loop is dependent upon the materials and dimensions of the cores, and the numbers of turns of the windings. The use of two cores having different temperature coefficients of inductance provides an arrangement wherein this coefficient for the combination is small. The core A 1 may be a ferrite containing oxides of Fe and some of the metals Mn, Cu, Al, and Ni, or a ferro-nickel alloy tape. The core A 2 may be a ferrite including oxides of metals from the group Mn, Zn and Ni and may be produced by grinding the mixture in distilled water, drying, shaping under a pressure of 1-10 tons/cm.<SP>2</SP> sintering at 1100-1400‹ C. and cooling in atmospheres of N 2 , O 2 or O 2 and N 2 .
GB12718/57A 1956-04-27 1957-04-18 Improvements in or relating to ferromagnetic devices Expired GB840749A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1150096T 1956-04-27

Publications (1)

Publication Number Publication Date
GB840749A true GB840749A (en) 1960-07-13

Family

ID=9647116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12718/57A Expired GB840749A (en) 1956-04-27 1957-04-18 Improvements in or relating to ferromagnetic devices

Country Status (4)

Country Link
BE (1) BE556989A (en)
FR (1) FR1150096A (en)
GB (1) GB840749A (en)
NL (1) NL216725A (en)

Also Published As

Publication number Publication date
BE556989A (en)
NL216725A (en)
FR1150096A (en) 1958-01-07

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