GB784572A - Improvements in or relating to magnetic drum recorder reading or writing heads - Google Patents

Improvements in or relating to magnetic drum recorder reading or writing heads

Info

Publication number
GB784572A
GB784572A GB1495956A GB1495956A GB784572A GB 784572 A GB784572 A GB 784572A GB 1495956 A GB1495956 A GB 1495956A GB 1495956 A GB1495956 A GB 1495956A GB 784572 A GB784572 A GB 784572A
Authority
GB
United Kingdom
Prior art keywords
core
coil
slot
hole
resin
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
GB1495956A
Inventor
George Thomas Baker
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.)
British Telecommunications PLC
British Telecommunications Research Ltd
Original Assignee
British Telecommunications PLC
British Telecommunications Research Ltd
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 British Telecommunications PLC, British Telecommunications Research Ltd filed Critical British Telecommunications PLC
Priority to GB1495956A priority Critical patent/GB784572A/en
Priority to DEB40143A priority patent/DE1061535B/en
Publication of GB784572A publication Critical patent/GB784572A/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
    • G11B5/10—Structure or manufacture of housings or shields for heads
    • 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
    • G11B5/1272—Assembling or shaping of elements
    • 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
    • G11B5/17—Construction or disposition of windings
    • 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
    • G11B5/29—Structure or manufacture of unitary devices formed of plural heads for more than one track
    • G11B5/295—Manufacture
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/56—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head support for the purpose of adjusting the position of the head relative to the record carrier, e.g. manual adjustment for azimuth correction or track centering

Landscapes

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

Abstract

784,572. Magnetic recorder reading or writing heads. BRITISH TELECOMMUNICATIONS RESEARCH, Ltd. March 17, 1955 [March 29, 1954], No. 14959/56. Divided out of 784,571, [Group XXXV]. Class 40 (2). A method of making a magnetic drum recorder reading or writing head comprises assembling an inductive coil 50 on a straight core 53 of magnetic strip material, e.g. transformer lamination material, bending round the ends of the strip, Fig. 3, so that they converge at an acute angle and the extremities are parallel to each other, inserting the coil and core in a hole 57 in a non-magnetic former 54, Fig. 4, with the parallel extremities of the core located in a slot 60 extending from the hole 57 at right angles to the coil axis, embedding the coil anp core in a casting resin by filling the hole therewith and hardening the resin, and then grinding away, Fig. 5, the former 54 resin and core 53 at the end of the slot 60 until the opposite ends of the core are separated by an appropriate gap. The coil 50 is wound with a decreasing number of turns per layer and the core 53 after being placed in the hole 57 is located therein by its ends being pulled through the slot 60 and then turned over (see Fig. 5). The resin is cast in a number of assemblies at the same time, Fig. 6, and a packing piece 63 fills the remainder of the slot 60 not occupied by the core ends. The grinding operation removes material to line Y-Y of Fig. 5 and further material to line XX is removed by a hand honing operation, the exact amount being determined by measuring the air gap with a microscope. Screws 58, 59 co-operating with oblique slots 55, 56 in the former 54 provide adjustment in the radial and circumferential directions respectively of the head with respect to the drum, not shown.
GB1495956A 1954-03-29 1954-03-29 Improvements in or relating to magnetic drum recorder reading or writing heads Expired GB784572A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1495956A GB784572A (en) 1954-03-29 1954-03-29 Improvements in or relating to magnetic drum recorder reading or writing heads
DEB40143A DE1061535B (en) 1954-03-29 1955-03-26 Process for the production of a read or write head for a magnetic drum memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1495956A GB784572A (en) 1954-03-29 1954-03-29 Improvements in or relating to magnetic drum recorder reading or writing heads

Publications (1)

Publication Number Publication Date
GB784572A true GB784572A (en) 1957-10-09

Family

ID=10050569

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1495956A Expired GB784572A (en) 1954-03-29 1954-03-29 Improvements in or relating to magnetic drum recorder reading or writing heads

Country Status (2)

Country Link
DE (1) DE1061535B (en)
GB (1) GB784572A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187315A (en) * 1960-06-21 1965-06-01 Ex Cell O Corp Postioning apparatus for magnetic heads in recording devices
US3284579A (en) * 1958-01-15 1966-11-08 Dirks Gerhard Magnetic recording and reading head mounting assembly
JPS5122372B1 (en) * 1968-09-14 1976-07-09
US4870272A (en) * 1988-10-24 1989-09-26 International Business Machines Corporation Transducer adjustment apparatus for shaft encoder
WO2002025218A1 (en) * 2000-09-20 2002-03-28 Dr. Johannes Heidenhain Gmbh Position measuring device
CN103722485A (en) * 2013-12-27 2014-04-16 天津重型装备工程研究有限公司 Automatic grinding and turnover device for sector plate of recoiling machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120728B (en) * 1960-01-09 1961-12-28 Grundig Max Method of manufacturing a magnetic head
DE1167891B (en) * 1962-04-12 1964-04-16 Telefunken Patent Method of manufacturing a magnetic head with a core made of ferrite

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1017377B (en) * 1953-09-17 1957-10-10 Rca Corp Method for manufacturing a magnetic head for recording or picking up signals, in particular television signals

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284579A (en) * 1958-01-15 1966-11-08 Dirks Gerhard Magnetic recording and reading head mounting assembly
US3187315A (en) * 1960-06-21 1965-06-01 Ex Cell O Corp Postioning apparatus for magnetic heads in recording devices
JPS5122372B1 (en) * 1968-09-14 1976-07-09
US4870272A (en) * 1988-10-24 1989-09-26 International Business Machines Corporation Transducer adjustment apparatus for shaft encoder
WO2002025218A1 (en) * 2000-09-20 2002-03-28 Dr. Johannes Heidenhain Gmbh Position measuring device
US6941240B2 (en) 2000-09-20 2005-09-06 Dr. Johannes Heidenhem Gmbh Position measuring device
CN103722485A (en) * 2013-12-27 2014-04-16 天津重型装备工程研究有限公司 Automatic grinding and turnover device for sector plate of recoiling machine
CN103722485B (en) * 2013-12-27 2016-04-27 天津重型装备工程研究有限公司 A kind of coiler sector plate automatic grinding and turning device

Also Published As

Publication number Publication date
DE1061535C2 (en) 1959-12-24
DE1061535B (en) 1959-07-16

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