[go: up one dir, main page]

GB669458A - An improved core for electro-magnets - Google Patents

An improved core for electro-magnets

Info

Publication number
GB669458A
GB669458A GB2518/50A GB251850A GB669458A GB 669458 A GB669458 A GB 669458A GB 2518/50 A GB2518/50 A GB 2518/50A GB 251850 A GB251850 A GB 251850A GB 669458 A GB669458 A GB 669458A
Authority
GB
United Kingdom
Prior art keywords
magnets
electro
improved core
jan
recording
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
GB2518/50A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB669458A publication Critical patent/GB669458A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/23—Gap features
    • G11B5/235—Selection of material for gap filler

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

669,458. Magnetic recording and reproducing apparatus. AKSJESELSKAPET PROTON. Jan. 31, 1950. [Jan. 31, 1949] No. 2518/50. Class 40 (ii). [Also in Group XXXV] A very narrow air-gap 3 in an electromagnet for recording apparatus is produced by electrolytically coating the opposed pole faces 7 with non-magnetic material, such as. copper.
GB2518/50A 1949-01-31 1950-01-31 An improved core for electro-magnets Expired GB669458A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO669458X 1949-01-31

Publications (1)

Publication Number Publication Date
GB669458A true GB669458A (en) 1952-04-02

Family

ID=19906576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2518/50A Expired GB669458A (en) 1949-01-31 1950-01-31 An improved core for electro-magnets

Country Status (1)

Country Link
GB (1) GB669458A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866011A (en) * 1954-07-13 1958-12-23 Clevite Corp Magnetic transducer head
US2911481A (en) * 1954-02-27 1959-11-03 Luxor Industri Ab Magnetic head comprising a core of ferrite
US3079470A (en) * 1959-12-21 1963-02-26 Armour Res Found Magnetic transducer head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911481A (en) * 1954-02-27 1959-11-03 Luxor Industri Ab Magnetic head comprising a core of ferrite
US2866011A (en) * 1954-07-13 1958-12-23 Clevite Corp Magnetic transducer head
US3079470A (en) * 1959-12-21 1963-02-26 Armour Res Found Magnetic transducer head

Similar Documents

Publication Publication Date Title
GB911671A (en) Method of and apparatus for the production of elongated pulse combination sequences of very long period for enciphering machines
GB1314197A (en) Dual output ac transducer
JPS5284722A (en) Thin film magnetic head and its production
GB669458A (en) An improved core for electro-magnets
GB761219A (en) Apparatus for sensing perforated records
GB722694A (en) Improvements in or relating to circuit arrangements, each comprising a magnetron to be excited by pulses
GB749412A (en) Improvements in or relating to magnetic sound recording and sound reproducing heads
GB713371A (en) Magnet core
GB709287A (en) Improvements in or relating to magnetic heads for magnetic sound recording apparatusemploying high-frequency bias
GB888632A (en) Improvements in or relating to arrangements for the storage and transmission of signals
GB880913A (en) Yarn tensioning device
GB824469A (en) Telephone sub-station including pre-setting means for multiple symbol combinations
GB775250A (en) A magnetic system with closed magnetic circuit
ES391424A1 (en) Magnetic field monitoring devices
JPS52153716A (en) Magnetic head
ES260772A1 (en) Method of manufacturing magnetic heads
GB354618A (en) Improvements in talking heads for electro-magnetic sound recording
GB724621A (en) Improvements relating to a permanent magnetic separating apparatus
GB768399A (en) Draughtsman's drawing board and t-square
GB944293A (en) A process for the production of ferro-magnetic materials having constancy of permeability by heat treatment in a magnetic field
GB792654A (en) Improvements in or relating to apparatus for producing a magnetic field of constant strength
GB835173A (en) Improvements in or relating to permanent magnet constructions
GB906404A (en) Improvements in and relating to electrical apparatus having an eddy-current brake magnet
GB635868A (en) Improvements in or relating to gramophone records
GB675435A (en) Improvements in or relating to magnetic sound recording methods